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OWNER’S MANUAL
63B-28199-1F
U.S.A.EditionLIT-18626-06-94
63B-9-1F Hyoshi 06.2.16 9:21 ページ 1
©2019 Yamaha M
otor Corporation, U.S.A.
EMU25060
ZMU01690
Read this owner’s manual carefully before operating your outboard motor.
63B-9-1F Hyoshi 06.2.16 9:21 ページ 2
©2019 Yamaha M
otor Corporation, U.S.A.
Important manual information
EMU31280
To the owner
Thank you for choosing a Yamaha outboardmotor. This Owner’s Manual contains infor-mation needed for proper operation, mainte-nance and care. A thorough understandingof these simple instructions will help you ob-tain maximum enjoyment from your newYamaha. If you have any question about theoperation or maintenance of your outboardmotor, please consult a Yamaha dealer.In this Owner’s Manual particularly importantinformation is distinguished in the followingways.
The Safety Alert Symbol meansATTENTION! BECOME ALERT! YOURSAFETY IS INVOLVED!
WARNING
EWM00780
Failure to follow WARNING instructionscould result in severe injury or death tothe machine operator, a bystander, or aperson inspecting or repairing the out-
board motor.
CAUTION:
ECM00700
A CAUTION indicates special precautionsthat must be taken to avoid damage to the
outboard motor.
NOTE:
A NOTE provides key information to make
procedures easier or clearer.
Yamaha continually seeks advancements inproduct design and quality. Therefore, whilethis manual contains the most current prod-uct information available at the time of print-ing, there may be minor discrepanciesbetween your machine and this manual. Ifthere is any question concerning this manu-
al, please consult your Yamaha dealer.
NOTE:
The 50TR and the standard accessories areused as a base for the explanations and illus-trations in this manual. Therefore some
items may not apply to every model.
EMU25110
50OWNER’S MANUAL
©2006 by Yamaha Motor Corporation, USA1st edition, February 2006
All rights reserved.Any reprinting or unauthorized usewithout the written permission ofYamaha Motor Corporation, USA
is expressly prohibited.Printed in Japan
P/N LIT-18626-06-94
©2019 Yamaha M
otor Corporation, U.S.A.
Table of contents
General information .......................... 1
Identification numbers record.......... 1
Outboard motor serial number .......... 1Key number....................................... 1
Emission control information ........... 1
North American models..................... 1
Safety information ........................... 2Important labels............................... 3
Warning labels .................................. 3
Basic boating rules (Rules of the road) ........................ 4
Steering and sailing rules and sound signals.................................. 4
Rules when encountering vessels .... 4Other special situations..................... 5
Fueling instructions ......................... 7
Gasoline............................................ 8Engine oil .......................................... 8
Battery requirement......................... 8
Battery specifications ........................ 8
Propeller selection........................... 8Start-in-gear protection ................... 9
Basic components .......................... 10
Main components.......................... 10
Fuel tank ......................................... 10Fuel joint ......................................... 11Fuel gauge ...................................... 11Fuel tank cap .................................. 11Air vent screw ................................. 11Remote control................................ 11Remote control lever ....................... 11Neutral interlock trigger ................... 12Neutral throttle lever........................ 12Tiller handle .................................... 12Gear shift lever................................ 12Throttle grip ..................................... 13Throttle indicator ............................. 13Throttle friction adjuster................... 13Engine stop lanyard switch ............. 14Engine stop button .......................... 14Main switch ..................................... 15Power trim and tilt switch on
remote control or tiller handle ....... 15Power trim and tilt switch on bottom
engine cowling .............................. 16
Trim tab with anode.........................16Trim rod (tilt pin) ..............................17Tilt support lever for power trim and
tilt or hydro tilt model.....................17Top cowling lock lever(s)
(turn type)......................................17Tachometer .....................................18Digital tachometer ...........................18Oil level indicators
(three indicators 2) ........................18Oil level indicator (digital type) ........18Overheat warning indicator (digital
type) ..............................................19Trim meter .......................................19Trim meter (digital type) ..................19Hour meter (digital type)..................19
Warning system ............................ 20
Overheat warning............................20Oil level warning and oil filter
clogging warning ...........................21
Operation ......................................... 23
Installation..................................... 23
Mounting the outboard motor ..........23Clamping the outboard motor..........24
Breaking in engine ........................ 25
Gasoline and engine oil mixing chart (50:1)....................................25
Procedure for oil injection models ...25
Preoperation checks ..................... 26
Fuel .................................................26Oil ....................................................26Controls...........................................26Engine .............................................26Operation after a long period of
storage ..........................................26
Filling fuel and engine oil .............. 27
Filling fuel for portable tank .............27Ring Free Fuel Additive...................27Filling oil for electric start models ....28Oil level indicator operation.............29
Operating engine .......................... 29
Feeding fuel (portable tank) ............29Starting engine ................................30
Warming up engine....................... 33
Electric start and prime start
©2019 Yamaha M
otor Corporation, U.S.A.
Table of contents
models .......................................... 33
Shifting .......................................... 33
Forward (tiller handle and remote control models) ............................. 33
Reverse (automatic reverse lock and power trim and tilt models)..... 34
Stopping engine ............................ 34
Procedure ....................................... 35
Trimming outboard motor.............. 35
Adjusting trim angle ........................ 36Adjusting boat trim .......................... 37
Tilting up and down ....................... 37
Procedure for tilting up (power trim and tilt models / power tilt models) ......................................... 38
Procedure for tilting down (power trim and tilt models / power tilt models) ......................................... 39
Cruising in shallow water .............. 40
Power trim and tilt models / power tilt models........................... 40
Cruising in other conditions........... 41
Maintenance..................................... 42
Specifications ................................ 42Transporting and storing outboard
motor ........................................... 43
Clamp screw mounting models ....... 43Storing outboard motor ................... 43Procedure ....................................... 44Lubrication (oil injection models)..... 45Cleaning and anticorrosion
measures ...................................... 45Battery care..................................... 45Cleaning the outboard motor .......... 46Checking painted surface of
motor............................................. 46
Periodic maintenance.................... 46
Replacement parts .......................... 46Maintenance chart .......................... 47Greasing ......................................... 49Cleaning and adjusting spark
plug ............................................... 49Checking fuel system...................... 50Inspecting fuel filter ......................... 51Cleaning fuel filter ........................... 51
Inspecting idling speed....................52Checking water in engine oil tank ...52Checking wiring and connectors .....52Exhaust leakage..............................53Water leakage .................................53Checking power trim and tilt /
power tilt system ...........................53Checking propeller ..........................53Removing the propeller ...................54Installing the Propeller.....................55Changing gear oil ............................55Cleaning fuel tank ...........................56Inspecting and replacing
anode(s)........................................57Checking battery (for electric start
models) .........................................57Connecting the battery ....................58Disconnecting the battery................59Checking top cowling ......................59Coating the boat bottom..................59
Trouble Recovery............................ 60
Troubleshooting ............................ 60Temporary action in emergency ... 63
Impact damage ...............................63Replacing fuse ................................63Power trim and tilt / power tilt will
not operate....................................64Starter will not operate ....................64Emergency starting engine .............65
Engine fails to operate .................. 66
Cold engine fails to start..................66
Treatment of submerged motor .... 67
Procedure........................................67
Consumer information ................... 69
Important warranty information for U.S.A. and Canada ..................... 69
YAMAHA MOTOR CORPORATION, U.S.A. OUTBOARD MOTOR TWO YEAR LIMITED WARRANTY ..... 71
IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA ...................... 74
©2019 Yamaha M
otor Corporation, U.S.A.
1
General information
EMU25170
Identification numbers record
EMU25183
Outboard motor serial number
The outboard motor serial number isstamped on the label attached to the portside of the clamp bracket.Record your outboard motor serial number inthe spaces provided to assist you in orderingspare parts from your Yamaha dealer or forreference in case your outboard motor is sto-len.
EMU25190
Key number
If a main key switch is equipped with the mo-tor, the key identification number is stampedon your key as shown in the illustration.Record this number in the space provided forreference in case you need a new key.
EMU25221
Emission control information
EMU25230
North American models
This engine conforms to U.S. EnvironmentalProtection Agency (EPA) regulations for ma-rine SI engines. See the label affixed to yourengine for details.
EMU30390
Approval label of emission control certif-icate
This label is attached to the bottom cowling.Existing Technology; N/A
1. Outboard motor serial number location
1
ZMU02931
1. Key number
1. Approval label location
1
ZMU05002
©2019 Yamaha M
otor Corporation, U.S.A.
General information
2
EMU25262
Manufactured date label
This label is attached to the clamp bracket orthe swivel bracket.
EMU25362
Safety information
�
Before mounting or operating the outboardmotor, read this entire manual. Reading it
should give you an understanding of themotor and its operation.
�
Before operating the boat, read any own-er’s or operator’s manuals supplied with itand all labels. Be sure you understandeach item before operating.
�
Do not overpower the boat with this out-board motor. Overpowering the boat couldresult in loss of control. The rated power ofthe outboard should be equal to or lessthan the rated horsepower capacity of theboat. If the rated horsepower capacity ofthe boat is unknown, consult the dealer orboat manufacturer.
�
Do not modify the outboard. Modificationscould make the motor unfit or unsafe touse.
�
Incorrect propeller selection and incorrectuse may not only cause engine damage,but also adversely affect fuel consumption.Consult your dealer for correct use.
�
Never operate after drinking alcohol or tak-ing drugs. About 50% of all boating fatali-ties involve intoxication.
�
Have an approved personal flotation de-vice (PFD) on board for every occupant. Itis a good idea to wear a PFD wheneverboating. At a minimum, children and non-swimmers should always wear PFDs, andeveryone should wear PFDs when thereare potentially hazardous boating condi-tions.
�
Gasoline is highly flammable, and its va-pors are flammable and explosive. Handleand store gasoline carefully. Make surethere are no gas fumes or leaking fuel be-fore starting the engine.
�
This product emits exhaust gases whichcontain carbon monoxide, a colorless,odorless gas which may cause brain dam-age or death when inhaled. Symptoms in-
1. Manufactured date label location
EMISSION CONTROL INFORMATIONENGINE FAMILY : THIS ENGINE CONFORMS TO 2001 U.S. EPA REGULATIONS FOR MARINE SI ENGINES.REFER TO THE OWNERS MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.FELs :SPARK PLUG :DISPLACEMENT :ADVERTISED POWER :
IDLE SPEED :SPARK PLUG GAP (mm) :FUEL : GASOLINEVALVE LASH (mm) : IN : N/A EX : N/A
cmkW
g/kW-hr rpm IN NEUTRAL
3
ZMU05230
1 ZMU04129
©2019 Yamaha M
otor Corporation, U.S.A.
General information
3
clude nausea, dizziness, and drowsiness.Keep cockpit and cabin areas well ventilat-ed. Avoid blocking exhaust outlets.
�
Check throttle, shift, and steering for prop-er operation before starting the engine.
�
Attach the engine stop switch lanyard cordto a secure place on your clothing, or yourarm or leg while operating. If you acciden-tally leave the helm, the cord will pull fromthe switch, stopping the engine.
�
Know the marine laws and regulationswhere you will be boating—and obeythem. For basic boating rules, see “Rulesof the road” on page 4.
�
Stay informed about the weather. Checkweather forecasts before boating. Avoidboating in hazardous weather.
�
Tell someone where you are going: leavea Float Plan with a responsible person. Besure to cancel the Float Plan when you re-turn.
�
Use common sense and good judgmentwhen boating. Know your abilities, and besure you understand how your boat han-dles under the different boating conditionsyou may encounter. Operate within yourlimits, and the limits of your boat. Alwaysoperate at safe speeds, and keep a carefulwatch for obstacles and other traffic.
�
Always watch carefully for swimmers dur-ing the engine operation.
�
Stay away from swimming areas.
�
When a swimmer is in the water near youshift into neutral and shut off the engine.
�
Do not illegally discard empty containersused to replace or replenish oil. For thecorrect processing of empty containers,consult the dealer where you purchasedthe oil.
�
When replacing oils used to lubricate theproduct (engine or gear oil), be sure to
wipe away any spilt oil. Never pour oil with-out using a funnel or similar device. If nec-essary, verify the necessary replacementprocedure with the dealer.
�
Never illegally discard (dump) the product.Yamaha recommends consulting the deal-er on discarding the product.
Be informed about boating safety. Additionalpublications and information can be obtainedfrom many organizations, including the fol-lowing:
United States Coast Guard
Consumer Affairs Staff (G-BC) Office of Boating, Public, and Consumer Af-fairs U.S. Coast Guard Headquarters Washington, D.C. 20593-0001 Boating Safety Hotline: 1-800-368-5647
National Marine Manufacturers Associa-tion (NMMA)
401 N. Michigan Ave. Chicago, Il 60611
Marine Retailers Association of America
155 N. Michigan Ave. Chicago, Il 60601
EMU25382
Important labels
EMU25395
Warning labels
ZMU03342
©2019 Yamaha M
otor Corporation, U.S.A.
General information
4
EMU25401
Label
WARNING
EWM01260
�
Be sure shift control is in neutral beforestarting engine. (except 2HP)
�
Do not touch or remove electrical partswhen starting or during operation.
�
Keep hands, hair, and clothes awayfrom flywheel and other rotating parts
while engine is running.
EMU25500
Basic boating rules (Rules of the road)
Just as there are rules which apply when youare driving on streets and high ways, thereare waterway rules which apply when youare driving your boat. These rules are usedinternationally, and are also enforced by theUnited States Coast Guard and local agen-cies. You should be aware of these rules,and follow them whenever you encounteranother vessel on the water.Several sets of rules prevail according togeographic location, but are all basically thesame as the International Rules of the Road.The rules presented here in your Owner’sManual are condensed, and have been pro-vided for your convenience only. Consultyour local U.S. Coast Guard Auxiliary or De-partment of Motor Vehicles for a completeset of rules governing the waters in whichyou will be using your boat.
EMU25510
Steering and sailing rules and sound signals
Whenever two vessels on the water meetone another, one vessel has the right-of-way; it is called the “stand-on” vessel. Thevessel which does not have the right-of-wayis called the “give-way” or “burdened” vessel.
These rules determine which vessel has theright-of-way, and what each vessel shoulddo.
Stand-on vessel
The vessel with the right-of-way has the dutyto continue its course and speed, except toavoid an immediate collision. When youmaintain your direction and speed, the othervessel will be able to determine how best toavoid you.
Give-way vessel
The vessel which does not have the right-of-way has the duty to take positive and timelyaction to stay out of the way of the Stand-Onvessel. Normally, you should not cross infront of the vessel with the right-of-way. Youshould slow down or change directions brief-ly and pass behind the other vessel. Youshould always move in such a way that theoperator of the other vessel can see whatyou are doing.
“The general prudential rule”
This rule is called Rule 2 in the InternationalRules and says,“In obeying and construing these rules dueregard shall be had to all dangers of naviga-tion and collision, and to any special circum-stances, which may render a departure fromthe above rules necessary in order to avoidimmediate danger.”In other words, follow the standard rules ex-cept when a collision will occur unless bothvessels try to avoid each other. If that is thecase, both vessels become “Give-Way” ves-sels.
EMU25520
Rules when encountering vessels
There are three main situations which youmay encounter with other vessels whichcould lead to a collision unless the SteeringRules are followed:
Meeting:
(you are approaching another ves-
©2019 Yamaha M
otor Corporation, U.S.A.
General information
5
sel head-on)
Crossing:
(you are traveling across the oth-er vessel’s path)
Overtaking:
(you are passing or beingpassed by another vessel)In the following illustration, your boat is in thecenter. You should give the right-of-way toany vessels shown in white area (you are theGive-Way vessel). Any vessels in the shad-ed area must yield to you (they are the Give-Way vessels). Both you and the meetingvessel must alter course to avoid each other.
Meeting
If you are meeting another power vesselhead on, and are close enough to run the riskof collision, neither of you has the right-of-way! Both of you should alter course to avoidan accident. You should keep the other ves-sel on your port (left) side. This rule doesn’tapply if both of you will clear one another ifyou continue on your set course and speed.
Crossing
When two power driven vessels are crossingeach other’s path close enough to run therisk of collision, the vessel which has the oth-er on the starboard (right) side must keep outof the way of the other. If the other vessel ison your right, you must keep out of its way;you are the Give-Way vessel. If the othervessel is on your port (left) side, rememberthat you should maintain course and direc-tion, provided the other vessel gives you theright-of-way as it should.
Overtaking
If you are passing another vessel, you arethe “Give-Way” vessel. This means that theother vessel is expected to maintain itscourse and speed. You must stay out of itsway until you are clear of it. Likewise, if an-other vessel is passing you, you shouldmaintain your speed and direction so that theother vessel can steer itself around you.
EMU25530
Other special situations
There are three other rules you should beaware of when driving your boat around oth-er vessels.
Narrow channels and bends
When navigating in narrow channels, youshould keep to the right when it is safe andpractical to do so. If the operator of a power-driven vessel is preparing to go around a
©2019 Yamaha M
otor Corporation, U.S.A.
General information
6
bend that may obstruct the view of other wa-ter vessels, the operator should sound a pro-longed blast on the whistle (4 to 6 seconds).If another vessel is around the bend, it tooshould sound the whistle. Even if no reply isheard, however, the vessel should still pro-ceed around the bend with caution. If younavigate such waters with your boat, you willneed to carry a portable air horn, availablefrom local marine supply stores.
Fishing vessel right-of-way
All vessels which are fishing with nets, linesor trawls are considered to be “fishing ves-sels” under the International Rules. Vesselswith trolling lines are not considered fishingvessels. Fishing vessels have the right-of-way regardless of position. Fishing vesselscannot, however, impede the passage ofother vessels in narrow channels.
Sailing vessel right-of-way
Sailing vessels should normally be given theright-of-way. The exceptions to this are:1. When the sailing vessel is overtaking
the power-driven vessel, the power-driv-en vessel has the right-of-way.
2. Sailing vessels should keep clear of anyfishing vessel.
3. In a narrow channel, a sailing vesselshould not hamper the safe passage ofa power-driven vessel which can navi-gate only in such a channel.
Reading buoys and other markers
The waters of the United states are markedfor safe navigation by the lateral system ofbuoyage. Simply put, buoys and markershave an arrangement of shapes, colors,numbers and lights to show which side of thebuoy a boater should pass on when navigat-ing in a particular direction. The markings onthese buoys are oriented from the perspec-tive of being entered from seaward (the boat-
er is going towards the port). This means thatred buoys are passed on the starboard(right) side when proceeding from open wa-ter into port, and black buoys are to port (left)side. When navigating out of port, your posi-tion with respect to the buoys should be re-versed; red buoys should be to port andblack buoys to starboard.Many bodies of water used by boaters areentirely within the boundaries of a particularstate. The Uniform State Waterway MarkingSystem has been devised for these waters.This system uses buoys and signs with dis-tinctive shapes and colors to show regulato-ry or advisory information. These markersare white with black letters and orangeboarders. They signify speed zones, restrict-ed areas, danger areas, and general infor-mation.Remember, markings may vary by geo-graphic location. Always consult local boat-ing authorities before driving your boat inunfamiliar waters.
©2019 Yamaha M
otor Corporation, U.S.A.
General information
7
EMU25540
Fueling instructions
WARNING
EWM00010
GASOLINE AND ITS VAPORS ARE HIGH-LY FLAMMABLE AND EXPLOSIVE!
�
Do not smoke when refueling, and keep
away from sparks, flames, or othersources of ignition.
�
Stop engine before refueling.
�
Refuel in a well-ventilated area. Refuelportable fuel tanks off the boat.
�
Take care not to spill gasoline. If gaso-line spills, wipe it up immediately with
ZMU01708
©2019 Yamaha M
otor Corporation, U.S.A.
General information
8
dry rags.
�
Do not overfill the fuel tank.
�
Tighten the filler cap securely after re-fueling.
�
If you should swallow some gasoline,inhale a lot of gasoline vapor, or getgasoline in your eyes, get immediatemedical attention.
�
If any gasoline spills onto your skin, im-mediately wash with soap and water.Change clothing if gasoline spills on it.
�
Touch the fuel nozzle to the filler open-ing or funnel to help prevent electro-
static sparks.
CAUTION:
ECM00010
Use only new clean gasoline which hasbeen stored in clean containers and is notcontaminated with water or foreign mat-
ter.
EMU25570
Gasoline
If knocking or pinging occurs, use a differentbrand of gasoline or premium unleaded fuel.
Gasohol
There are two types of gasohol: gasohol con-taining ethanol and that containing metha-nol. Gasohol containing ethanol can be usedif ethanol content does not exceed 10% andthe fuel meets minimum octane ratings.Yamaha does not recommended gasoholcontaining methanol because it can causefuel system damage or engine performanceproblems.
EMU25650
Engine oil
If the recommended engine oil is not avail-able, another 2-stroke engine oil with anNMMA-certified TC-W3 rating may be used.
EMU25690
Battery requirement
CAUTION:
ECM01060
Do not use a battery that does not meetthe specified capacity. If a battery whichdoes not meet specifications is used, theelectric system could perform poorly orbe overloaded, causing electric system
damage.
For electric start models, choose a batterywhich meets the following specifications.
EMU25711
Battery specifications
EMU25742
Propeller selection
The performance of your outboard motor willbe critically affected by your choice of propel-ler, as an incorrect choice could adverselyaffect performance and could also seriouslydamage the motor. Engine speed dependson the propeller size and boat load. If engine
Recommended gasoline:Regular unleaded gasoline with a min-imum octane rating of 86 (Pump Oc-tane Number) = (R+M)/2
Recommended engine oil:YAMALUBE 2-stroke outboard motor oil
Minimum cold cranking amps (CCA/SAE):
245.0 AMinimum marine cranking amps (MCA/ABYC):
323.0 AMinimum reserve capacity (RC/SAE):
52 minutes
©2019 Yamaha M
otor Corporation, U.S.A.
General information
9
speed is too high or too low for good engineperformance, this will have an adverse effecton the engine.Yamaha outboard motors are fitted with pro-pellers chosen to perform well over a rangeof applications, but there may be uses wherea propeller with a different pitch would bemore appropriate. For a greater operatingload, a smaller-pitch propeller is more suit-able as it enables the correct engine speedto be maintained. Conversely, a larger-pitchpropeller is more suitable for a smaller oper-ating load.Yamaha dealers stock a range of propellers,and can advise you and install a propeller onyour outboard that is best suited to your ap-plication.
NOTE:
Select a propeller which will allow the engineto reach the middle or upper half of the oper-ating range at full throttle with the maximumboat load. If operating conditions such aslight boat loads then allow the engine r/min torise above the maximum recommendedrange, reduce the throttle setting to maintain
the engine in the proper operating range.
For instructions on propeller removal and in-stallation, see page 53.
EMU25770
Start-in-gear protection
Yamaha outboard motors or Yamaha-ap-proved remote control units are equippedwith start-in-gear protection device(s). Thisfeature permits the engine to be started onlywhen it is in neutral. Always select neutralbefore starting the engine.
1. Propeller diameter in inches2. Propeller pitch in inches3. Type of propeller (propeller mark)
ZMU04606
-x1 2 3
©2019 Yamaha M
otor Corporation, U.S.A.
10
Basic components
EMU25799
Main componentsNOTE:
* May not be exactly as shown; also may not be included as standard equipment on all mod-
els.
50
EMU25802
Fuel tank
If your model was equipped with a portablefuel tank, its function is as follows.
WARNING
EWM00020
The fuel tank supplied with this engine isits dedicated fuel reservoir and must notbe used as a fuel storage container. Com-mercial users should conform to relevantlicensing or approval authority regula-
11
14 15
12 131
2
43
562
7
89
10
ZMU05014
1. Battery cable2. Anode(s)3. Propeller*4. Cooling water inlet5. Trim tab (anode)6. Anti-cavitation plate7. Trim rod8. Clamp bracket9. Tilt support lever10. Top cowling11. Remote control box (side mount type)*12. Digital tachometer*13. Tachometer*14. Trim meter*
15. Fuel tank*
©2019 Yamaha M
otor Corporation, U.S.A.
Basic components
11
tions.
EMU25830
Fuel joint
This joint is used to connect the fuel line.
EMU25841
Fuel gauge
This gauge is located on either the fuel tankcap or on the fuel joint base. It shows the ap-proximate amount of fuel remaining in thetank.
EMU25850
Fuel tank cap
This cap seals the fuel tank. When removed,the tank can be filled with fuel. To remove thecap, turn it counterclockwise.
EMU25860
Air vent screw
This screw is on the fuel tank cap. To loosenthe screw, turn it counterclockwise.
EMU26180
Remote control
The remote control lever actuates both theshifter and the throttle. The electrical switch-es are mounted on the remote control box.
EMU26190
Remote control lever
Moving the lever forward from the neutral po-sition engages forward gear. Pulling the le-ver back from neutral engages reverse. Theengine will continue to run at idle until the le-ver is moved about 35° (a detent can be felt).Moving the lever farther opens the throttle,and the engine will begin to accelerate.
1. Fuel joint2. Fuel gauge3. Fuel tank cap4. Air vent screw
ZMU03157
1 3 4 2
1. Power trim and tilt switch2. Remote control lever3. Neutral interlock trigger4. Neutral throttle lever5. Main switch / choke switch6. Engine stop lanyard switch7. Throttle friction adjuster
1. Neutral “ ”
2. Forward “ ”
3. Reverse “ ”4. Shift5. Fully closed
©2019 Yamaha M
otor Corporation, U.S.A.
Basic components
12
EMU26201
Neutral interlock trigger
To shift out of neutral, first pull the neutral in-terlock trigger up.
EMU26211
Neutral throttle lever
To open the throttle without shifting into ei-ther forward or reverse, put the remote con-trol lever in the neutral position and lift theneutral throttle lever.
NOTE:
The neutral throttle lever will operate onlywhen the remote control lever is in neutral.The remote control lever will operate onlywhen the neutral throttle lever is in the closed
position.
EMU25911
Tiller handle
To change direction, move the tiller handle tothe left or right as necessary.
EMU25922
Gear shift lever
Pulling the gear shift lever towards you putsthe engine in forward gear so that the boatmoves ahead. Pushing the lever away fromyou puts the engine in reverse gear so thatthe boat moves astern.
6. Throttle7. Fully open
1. Neutral interlock trigger
1. Fully open2. Fully closed
©2019 Yamaha M
otor Corporation, U.S.A.
Basic components
13
EMU25941
Throttle grip
The throttle grip is on the tiller handle. Turnthe grip counterclockwise to increase speedand clockwise to decrease speed.
EMU25961
Throttle indicator
The fuel consumption curve on the throttleindicator shows the relative amount of fuelconsumed for each throttle position. Choosethe setting that offers the best performanceand fuel economy for the desired operation.
EMU25971
Throttle friction adjuster
A friction device provides adjustable resis-tance to movement of the throttle grip or theremote control lever, and can be set accord-ing to operator preference.To increase resistance, turn the adjusterclockwise. To decrease resistance, turn theadjuster counterclockwise.
WARNING
EWM00031
Do not overtighten the friction adjuster. Ifthere is too much resistance, it could bedifficult to move the remote control leveror throttle grip, which could result in an
accident.
1. Forward “ ”
2. Neutral “ ”
3. Reverse “ ”
1. Throttle indicator
ZMU03095
©2019 Yamaha M
otor Corporation, U.S.A.
Basic components
14
When constant speed is desired, tighten theadjuster to maintain the desired throttle set-ting.
EMU25990
Engine stop lanyard switch
The lock plate must be attached to the en-gine stop switch for the engine to run. Thelanyard should be attached to a secure placeon the operator’s clothing, or arm or leg.Should the operator fall overboard or leavethe helm, the lanyard will pull out the lockplate, stopping ignition to the engine. Thiswill prevent the boat from running away un-der power.
WARNING
EWM00120
�
Attach the engine stop switch lanyardto a secure place on your clothing, oryour arm or leg while operating.
�
Do not attach the lanyard to clothingthat could tear loose. Do not route thelanyard where it could become entan-gled, preventing it from functioning.
�
Avoid accidentally pulling the lanyardduring normal operation. Loss of en-gine power means the loss of moststeering control. Also, without enginepower, the boat could slow rapidly. Thiscould cause people and objects in the
boat to be thrown forward.
NOTE:
The engine cannot be started with the lock
plate removed.
EMU26001
Engine stop button
To open the ignition circuit and stop the en-gine, push this button.
1. Lanyard2. Lock plate
1. Lanyard2. Lock plate
©2019 Yamaha M
otor Corporation, U.S.A.
Basic components
15
EMU26090
Main switch
The main switch controls the ignition system;its operation is described below.
�
“ ”
(off)
With the main switch in the “ ” (off) posi-tion, the electrical circuits are off, and the keycan be removed.
�
“ ”
(on)
With the main switch in the “ ” (on) posi-tion, the electrical circuits are on, and the keycannot be removed.
�
“ ”
(start)
With the main switch in the “ ” (start) po-sition, the starter motor turns to start the en-gine. When the key is released, it returnsautomatically to the “ ” (on) position.
EMU26141
Power trim and tilt switch on remote control or tiller handle
The power trim and tilt system adjusts theoutboard motor angle in relation to the tran-som. Pressing the switch “ ” (up) trims theoutboard motor up, then tilts it up. Pressingthe switch “ ” (down) tilts the outboard mo-tor down and trims it down. When the switchis released, the outboard motor will stop in itscurrent position.
NOTE:
For instructions on using the power trim and
tilt switch, see pages 35 and 37.
©2019 Yamaha M
otor Corporation, U.S.A.
Basic components
16
EMU26151
Power trim and tilt switch on bottom engine cowling
The power trim and tilt switch is located onthe side of the bottom engine cowling. Press-ing the switch “ ” (up) trims the outboardmotor up, then tilts it up. Pressing the switch“ ” (down) tilts the outboard motor downand trims it down. When the switch is re-leased, the outboard motor will stop in itscurrent position.
WARNING
EWM01030
Use the power trim and tilt switch locatedon the bottom engine cowling only whenthe boat is at a complete stop with the en-gine off. Attempting to use this switchwhile the boat is moving could increasethe risk of falling overboard and coulddistract the operator, increasing the riskof collision with another boat or an obsta-
cle.
NOTE:
For instructions on using the power trim and
tilt switch, see page 37.
EMU26241
Trim tab with anode
The trim tab should be adjusted so that thesteering control can be turned to either theright or left by applying the same amount offorce.
WARNING
EWM00840
An improperly adjusted trim tab couldcause difficult steering. Always test runafter the trim tab has been installed or re-placed to be sure steering is correct. Besure you have tightened the bolt after ad-
justing the trim tab.
If the boat tends to veer the left (port side),turn the trim tab rear end to the port side “A”in the figure. If the boat tends to veer the right(starboard side), turn the trim tab end to thestarboard side “B” in the figure.
CAUTION:
ECM00840
The trim tab also serves as an anode toprotect the engine from electrochemicalcorrosion. Never paint the trim tab as it
will become ineffective as an anode.
DOWN
UP
ZMU03096
©2019 Yamaha M
otor Corporation, U.S.A.
Basic components
17
EMU26261
Trim rod (tilt pin)
The position of the trim rod determines theminimum trim angle of the outboard motor inrelation to the transom.
EMU26340
Tilt support lever for power trim and tilt or hydro tilt model
To keep the outboard motor in the tilted upposition, lock the tilt support lever to theclamp bracket.
EMU26372
Top cowling lock lever(s) (turn type)
To remove the engine top cowling, turn thelock lever(s) and lift off the cowling. When in-stalling the cowling, check to be sure it fitsproperly in the rubber seal. Then lock thecowling again by returning the lever(s) to thelock position.
1. Trim tab2. Bolt
A
B
ZMU03097
1
2
ZMU03357
1. Top cowling lock lever(s)
1. Top cowling lock lever(s)
ZMU03194
ZMU03827
1
ZMU025961
©2019 Yamaha M
otor Corporation, U.S.A.
Basic components
18
EMU26470
Tachometer
This gauge shows the engine speed and hasthe following functions.
EMU26491
Digital tachometer
The tachometer shows the engine speedand has the following functions.
NOTE:
All segments of the display will light momen-tarily after the main switch is turned on and
will return to normal thereafter.
NOTE:
The water separator and engine troublewarning indicators only operate when the en-gine is equipped with the appropriate func-
tions.
EMU26540
Oil level indicators (three indicators 2)
The indicators on the gauge show the statusof the oil level. For details on how to read theindicators, see page 29.
CAUTION:
ECM00030
Do not operate the engine without oil. Se-
rious engine damage will occur.
EMU26550
Oil level indicator (digital type)
This indicator shows the engine oil level. Ifthe oil level falls below the lower limit, thewarning indicator will start to blink. For fur-ther information, see page 21.
CAUTION:
ECM00030
Do not operate the engine without oil. Se-
1. Tachometer2. Oil level indicator
1. Tachometer2. Trim meter3. Hour meter4. Oil level indicator5. Overheat warning indicator6. Water separator warning indicator
ZMU04577
1
2
67
2
498
5
3
1
ZMU01958
7. Engine trouble warning indicator8. Set button9. Mode button
1. Oil level indicators
ZMU04580
1
©2019 Yamaha M
otor Corporation, U.S.A.
Basic components
19
rious engine damage will occur.
EMU26581
Overheat warning indicator (digital type)
If the engine temperature rises too high, thewarning indicator will start to blink. For fur-ther information on reading the indicator, seepage 20.
CAUTION:
ECM00050
Do not continue to run the engine if theoverheat warning indicator is on. Serious
engine damage will occur.
EMU26610
Trim meter
This gauge shows the trim angle of your out-board motor.
NOTE:
Memorize the trim angles that work best foryour boat under different conditions. Adjustthe trim angle to the desired setting with the
power trim and tilt switch.
EMU26620
Trim meter (digital type)
This meter shows the trim angle of your out-board motor.
NOTE:
�
Memorize the trim angles that work bestfor your boat under different conditions.Adjust the trim angle to the desired usingthe power trim and tilt switch.
�
If the trim angle of your motor exceeds thetrim operating range, the top segment on
the trim meter display will blink.
EMU26650
Hour meter (digital type)
This meter shows the number of hours the
1. Oil level indicator
1. Overheat warning indicator
1ZMU01867
1
ZMU01868
ZMU04581
ZMU01869
©2019 Yamaha M
otor Corporation, U.S.A.
Basic components
20
engine has been run. It can be set to showthe total number of hours or the number ofhours for the current trip. The display canalso be turned on and off.
�
Changing the display format
�
Pressing the “ ” (mode) button chang-es the display format in the following pat-tern:
�
Total hours
→
Trip hours
→
Display off
�
Resetting the trip hours
�
Simultaneously pressing the “ ” (set)and “ ” (mode) buttons for more than1 second while the trip hours are displayedresets the trip counter to 0 (zero).
NOTE:
The total number of hours the engine has
been run cannot be reset.
EMU26801
Warning system
CAUTION:
ECM00090
Do not continue to operate the engine if awarning device has activated. Consultyour Yamaha dealer if the problem can-
not be located and corrected.
EMU26816
Overheat warning
This engine has an overheat warning device.If the engine temperature rises too high, thewarning device will activate.
Activation of warning device
�
The engine speed will automatically de-crease to about 2000 r/min.
�
If equipped with an overheat warning indi-cator, it will light or blink.
�
The buzzer will sound (if equipped on thetiller handle, remote control box, or mainswitch panel).
If the warning system has activated, stop theengine and check the cooling water inlet forclogging.
ZMU01870
ZMU04766
ZMU01757
ZMU03025
©2019 Yamaha M
otor Corporation, U.S.A.
Basic components
21
EMU26846
Oil level warning and oil filter clogging warning
Oil injection models
This engine has an oil level warning system.If the oil level falls below the lower limit, thewarning system will activate.
Activation of warning device
�
Engine speed will automatically decreaseto about 2000 r/min.
�
The oil level warning indicator will light orblink.
�
The buzzer will sound (if equipped on thetiller handle, remote control box, or mainswitch panel).
If the warning system has been activated,stop the engine and check for the cause.
NOTE:
The warning for oil filter clogging is similar tothe warnings for low oil level and overheat-ing. To make troubleshooting easier, checkfor engine overheating first, then oil level,
ZMU03026
ZMU04586
ZMU03363
ZMU03942
©2019 Yamaha M
otor Corporation, U.S.A.
Basic components
22
and finally oil filter clogging.
1. Oil filter
ZMU03366
1
©2019 Yamaha M
otor Corporation, U.S.A.
23
Operation
EMU26901
Installation
CAUTION:
ECM00110
Incorrect engine height or obstructionsto smooth water flow (such as the designor condition of the boat, or accessoriessuch as transom ladders or depth findertransducers) can create airborne waterspray while the boat is cruising. Severeengine damage may result if the motor isoperated continuously in the presence of
airborne water spray.
NOTE:
During water testing check the buoyancy ofthe boat, at rest, with its maximum load.Check that the static water level on the ex-haust housing is low enough to prevent wa-ter entry into the powerhead, when waterrises due to waves when the outboard is not
running.
EMU26910
Mounting the outboard motor
WARNING
EWM00820
�
Overpowering a boat could cause se-vere instability. Do not install an out-board motor with more horsepowerthan the maximum rating on the capac-ity plate of the boat. If the boat does nothave a capacity plate, consult the boatmanufacturer.
�
The information presented in this sec-tion is intended as reference only. It isnot possible to provide complete in-structions for every possible boat andmotor combination. Proper mountingdepends in part on experience and the
specific boat and motor combination.
WARNING
EWM00830
Improper mounting of the outboard mo-tor could result in hazardous conditionssuch as poor handling, loss of control, orfire hazards. Observe the following:
�
For permanently mounted models, yourdealer or other person experienced inproper rigging should mount the motor.If you are mounting the motor yourself,you should be trained by an experi-enced person.
�
For portable models, your dealer or oth-er person experienced in proper out-board motor mounting should show
you how to mount your motor.
Mount the outboard motor on the center line(keel line) of the boat, and ensure that theboat itself is well balanced. Otherwise theboat will be hard to steer. For boats withouta keel or which are asymmetrical, consultyour dealer.
EMU26930
Mounting height (boat bottom)
To run your boat at optimum efficiency, thewater resistance (drag) of the boat and out-board motor must be made as little as possi-ble. The mounting height of the outboard
1. Center line (keel line)
ZMU017601
©2019 Yamaha M
otor Corporation, U.S.A.
Operation
24
motor greatly affects the water resistance. Ifthe mounting height is too high, cavitationtends to occur, thus reducing the propulsion;and if the propeller tips cut the air, the enginespeed will rise abnormally and cause the en-gine to overheat. If the mounting height is toolow, the water resistance will increase andthereby reduce engine efficiency. Mount theoutboard motor so that the anti-cavitationplate is in alignment with the bottom of theboat.
NOTE:
�
The optimum mounting height of the out-board motor is affected by the boat/motorcombination and the desired use. Testruns at different heights can help deter-mine the optimum mounting height. Con-sult your Yamaha dealer or boatmanufacturer for further information on de-termining the proper mounting height.
�
For instructions on setting the trim angle of
the outboard motor, see page 35.
EMU26970
Clamping the outboard motor
1. Place the outboard motor on the tran-som so that it is positioned as close tothe center as possible. Tighten the tran-som clamp screws evenly and securely.Occasionally check the clamp screwsfor tightness during operation of the out-board motor because they could be-
come loose due to engine vibration.
WARNING
EWM00640
Loose clamp screws could allow the out-board motor to fall off or move on thetransom. This could cause loss of controland serious injury. Make sure the tran-som screws are tightened securely. Oc-casionally check the screws for tightness
during operation.
2. If the engine restraint cable attachmentis equipped on your engine, an enginerestraint cable or chain should be used.Attach one end to the engine restraintcable attachment and the other to a se-cure mounting point on the boat. Other-wise the engine could be completely lostif it accidentally falls off the transom.
3. Secure the clamp bracket to the transomusing the bolts provided with the out-
ZMU01762ZMU02012
ZMU02013
©2019 Yamaha M
otor Corporation, U.S.A.
Operation
25
board (if packed). For details, consultyour Yamaha dealer.
WARNING
EWM00650
Avoid using bolts, nuts or washers otherthan those contained in the engine pack-aging. If used, they must be of at least thesame quality of material and strength andmust be tightened securely. After tighten-ing, test run the engine and check their
tightness.
EMU27020
Breaking in engine
Your new engine requires a period of break-in to allow mating surfaces of moving parts towear in evenly. Correct break-in will help en-sure proper performance and longer enginelife.
CAUTION:
ECM00140
�
Failure to follow the break-in procedurecould result in reduced engine life oreven severe engine damage.
�
Premix fuel must be used during break-in in addition to oil in the oil injection
system.
EMU27060
Gasoline and engine oil mixing chart (50:1)
CAUTION:
ECM00150
Be sure to mix gasoline and oil complete-ly, otherwise the engine may be dam-
aged.
EMU30311
Procedure for oil injection models
Run the engine under load (in gear with apropeller installed) for 10 hours as follows.1. First 10 minutes:
Run the engine at the lowest possiblespeed. A fast idle in neutral is best.
2. Next 50 minutes:Do not exceed half throttle (approxi-mately 3000 r/min). Vary engine speedoccasionally. If you have an easy-plan-ing boat, accelerate at full throttle ontoplane, then immediately reduce thethrottle to 3000 r/min or less.
3. Next two hours:Accelerate at full throttle onto plane,then reduce engine speed to three-quar-ter throttle (approximately 4000 r/min).Vary engine speed occasionally. Run atfull throttle for one minute, then allowabout 10 minutes of operation at three-quarter throttle or less to let the engine
1. Bolts
ZMU03185
1 1
1. : Gasoline
2. : Engine oil
©2019 Yamaha M
otor Corporation, U.S.A.
Operation
26
cool.4. Remaining seven hours:
Run the engine at any speed. However,avoid operating at full throttle for morethan 5 minutes at a time.
5. After the first 10 hours:Operate the engine normally. Use onlystraight gasoline in the fuel tank. TheYamaha oil injection system providesproper lubrication for normal operation.
EMU27102
Preoperation checks
WARNING
EWM00080
If any item in the preoperation check isnot working properly, have it inspectedand repaired before operating the out-board motor. Otherwise an accident
could occur.
CAUTION:
ECM00120
Do not start the engine out of water. Over-heating and serious engine damage can
occur.
EMU27111
Fuel
�
Check to be sure you have plenty of fuelfor your trip.
�
Make sure there are no fuel leaks or gaso-line fumes.
�
Check fuel line connections to be sure theyare tight (if equipped Yamaha fuel tank orboat tank).
�
Be sure the fuel tank is positioned on a se-cure, flat surface, and that the fuel line isnot twisted or flattened, or likely to contactsharp objects (if equipped Yamaha fueltank or boat tank).
EMU27120
Oil
�
Check to be sure you have plenty of oil for
your trip.
EMU27130
Controls
�
Check throttle, shift, and steering for prop-er operation before starting the engine.
�
The controls should work smoothly, with-out binding or unusual free play.
�
Look for loose or damaged connections.
�
Check operation of the starter and stopswitches when the outboard motor is in thewater.
EMU27140
Engine
�
Check the engine and engine mounting.
�
Look for loose or damaged fasteners.
�
Check the propeller for damage.
EMU27170
Operation after a long period of storage
When operating the engine after a long peri-od (12 months) of storage, proceed as fol-lows:1. Use a 50:1 gasoline-oil mixture to start
the engine.2. Start the engine. Leave it idling.
WARNING
EWM00090
�
Do not touch or remove electrical partswhen starting or during operation.
�
Keep hands, hair, and clothes awayfrom the flywheel and other rotating
parts while the engine is running.
3. Watch for oil flowing through the oil feedpipes. After any air in the oil lines hasbeen expelled, the oil injection systemshould supply oil normally. If no oil isflowing after 10 minutes of idling, consultyour Yamaha dealer.
©2019 Yamaha M
otor Corporation, U.S.A.
Operation
27
CAUTION:
ECM00130
Be sure to take the above steps when op-erating the engine after a long period ofstorage. Otherwise engine seizure could
occur.
EMU27233
Filling fuel and engine oil
EMU27242
Filling fuel for portable tank
WARNING
EWM00060
Gasoline and its vapors are highly flam-mable and explosive. Keep away fromsparks, cigarettes, flames, or other
sources of ignition.
1. Remove the fuel tank cap.2. Fill the fuel tank carefully.3. Close the cap securely after refueling.
Wipe up any spilled fuel.
EMU27270
Ring Free Fuel Additive
Gasoline is a precise blend of many differentsubstances, each chosen to give certaincharacteristics. Gasoline blends have beenchanging in recent years in response to con-cerns about pollution and resulting emis-sions regulations. One of the most obviouschanges has been the elimination of leadfrom most fuels.As gasoline has changed, the amount of ad-ditives such as aromatics and oxygenateshas increased. These additives are impor-tant for the engines in passenger cars, butthey can have detrimental effects in marineengines, because of increased deposits inthe combustion chamber. When enough de-posits collect, piston rings begin sticking.Performance drops and engine wear in-creases dramatically.While many additives available may reducedeposits, Yamaha recommends the use of
Ring Free Fuel Additive
, available fromyour Yamaha dealer.
Ring Free Fuel Addi-tive
has repeatedly proven its ability to cleancombustion deposits from inside the engine,notably the critical piston-ring-land area, andfuel system components. Follow product la-beling for use instructions.
Fuel tank capacity (if equipped Yamaha fuel tank):
25 L (6.60 US gal) (5.50 Imp.gal)
ZMU03367 ZMU03012
©2019 Yamaha M
otor Corporation, U.S.A.
Operation
28
EMU27311
Filling oil for electric start models
WARNING
EWM00530
Do not add gasoline into the oil tank. Fire
or explosion could result.
This engine uses the Yamaha oil injectionsystem, which provides superior lubricationby ensuring the proper oil ratio for all operat-ing conditions. No fuel premixing is needed.Simply pour gasoline into the fuel tank andoil into the oil tank. Convenient indicator seg-ments indicate the status of the oil supply.For details on reading the indicator seg-ments, see page 29.To fill the engine oil tank, proceed as follows:
1. Turn the oil filler access cap on the topcowling counterclockwise and open it.
2. Open the oil tank filler cap by pulling thetab on the cap.
3. Slowly pour the engine oil into the en-gine oil tank.
4. After filling, replace the all caps secure-ly.
Engine oil tank capacity: 1.5 L (1.59 US qt) (1.32 Imp.qt)
ZMU03369
1. Oil filler access cap2. Oil tank filler cap
ZMU03370
ZMU03371
21
©2019 Yamaha M
otor Corporation, U.S.A.
Operation
29
EMU27321
Oil level indicator operation
The various functions of the oil level system are as follows:
EMU27350
Electric start models
EMU27450
Operating engine
EMU27461
Feeding fuel (portable tank)
WARNING
EWM00420
�
Before starting the engine, make surethat the boat is tightly moored and thatyou can steer clear of any obstructions.Be sure there are no swimmers in thewater near you.
�
When the air vent screw is loosened,gasoline vapor will be released. Gaso-line is highly flammable, and its vapors
are flammable and explosive. Refrainfrom smoking, and keep away fromopen flames and sparks while loosen-ing the air vent screw.
�
This product emits exhaust gaseswhich contain carbon monoxide, a col-orless, odorless gas which could causebrain damage or death when inhaled.Symptoms include nausea, dizziness,and drowsiness. Keep cockpit and cab-in areas well ventilated. Avoid blocking
exhaust outlets.
1. If there is an air vent screw on the fuel
Oil level warning indicator (digital
tachometer)
Oil level warning indicator (analog
tachometer/bottom
cowling)
Engine oil tank Remarks
Greenmore than 450
cm
3
(0.48 US qt, 0.40 Imp qt)
No refilling necessary.
Yellow from 450 cm
3
(0.48 US qt, 0.40 Imp qt) down to
200 cm
3
(0.21 US qt, 0.18 Imp qt)
Add oil; see page 28.
Red
200 cm
3
(0.21 US qt, 0.18 Imp qt) or less
�
Buzzer sounds in remote control box and engine speed is limited to about 2000 r/min to help con-serve oil.
�
Check oil filter for clogging.
©2019 Yamaha M
otor Corporation, U.S.A.
Operation
30
tank cap, loosen it 2 or 3 turns.
2. If there is a fuel joint on the motor, firmlyconnect the fuel line to the joint. Thenfirmly connect the other end of the fuelline to the joint on the fuel tank.
3. If a steering friction adjuster is providedon your outboard motor, securely attachthe fuel line to the fuel line clamp.
NOTE:
During engine operation place the tank hori-
zontally, otherwise fuel cannot be drawn
from the fuel tank.
4. Squeeze the primer pump with the outletend up until you feel it become firm.
EMU27490
Starting engine
EMU27592
Electric start / prime start models
1. Place the gear shift lever in neutral.
NOTE:
The start-in-gear protection device preventsthe engine from starting except when in neu-
tral.
2. Attach the engine stop switch lanyard toa secure place on your clothing, or yourarm or leg. Then install the lock plate onthe other end of the lanyard into the en-
ZMU02295
ZMU03100
ZMU02024
ZMU02025
©2019 Yamaha M
otor Corporation, U.S.A.
Operation
31
gine stop switch.
WARNING
EWM00120
�
Attach the engine stop switch lanyardto a secure place on your clothing, oryour arm or leg while operating.
�
Do not attach the lanyard to clothingthat could tear loose. Do not route thelanyard where it could become entan-gled, preventing it from functioning.
�
Avoid accidentally pulling the lanyardduring normal operation. Loss of en-gine power means the loss of moststeering control. Also, without enginepower, the boat could slow rapidly. Thiscould cause people and objects in the
boat to be thrown forward.
3. Place the throttle grip in the “ ”(start) position. After the engine starts,return the throttle to the fully closed po-sition.
4. Turn the main switch to “ ” (start),and hold it for a maximum of 5 seconds.
5. Immediately after the engine starts, re-lease the main switch and allow it to re-turn to “ ” (on).
CAUTION:
ECM00191
�
Never turn the main switch to “ ”(start) while the engine is running.
�
Do not keep the starter motor turningfor more than 5 seconds. If the startermotor is turned continuously for morethan 5 seconds, the battery will bequickly discharged, thus making it im-possible to start the engine. The startercan also be damaged. If the engine willnot start after 5 seconds of cranking,return the main switch to “ ” (on), wait10 seconds, then crank the engine
again.
NOTE:
�
When the engine is cold, it needs to bewarmed up. For further information, seepage 33.
�
If the engine is warm and fails to start,open the throttle slightly and try to start theengine again. If the engine still fails to
start, see page 60.
©2019 Yamaha M
otor Corporation, U.S.A.
Operation
32
EMU27662
Electric start and remote control models
1. Place the remote control lever in neutral.
NOTE:
The start-in-gear protection device preventsthe engine from starting except when in neu-
tral.
2. Attach the engine stop switch lanyard toa secure place on your clothing, or yourarm or leg. Then install the lock plate onthe other end of the lanyard into the en-gine stop switch.
WARNING
EWM00120
�
Attach the engine stop switch lanyardto a secure place on your clothing, oryour arm or leg while operating.
�
Do not attach the lanyard to clothingthat could tear loose. Do not route thelanyard where it could become entan-gled, preventing it from functioning.
�
Avoid accidentally pulling the lanyardduring normal operation. Loss of en-gine power means the loss of moststeering control. Also, without enginepower, the boat could slow rapidly. Thiscould cause people and objects in the
boat to be thrown forward.
3. Turn the main switch to “ ” (on).4. Turn the main switch to “ ” (start),
and hold it for a maximum of 5 seconds.
5. Immediately after the engine starts, re-lease the main switch and allow it to re-turn to “ ” (on).
CAUTION:
ECM00191
�
Never turn the main switch to “ ”(start) while the engine is running.
�
Do not keep the starter motor turningfor more than 5 seconds. If the startermotor is turned continuously for morethan 5 seconds, the battery will bequickly discharged, thus making it im-possible to start the engine. The startercan also be damaged. If the engine willnot start after 5 seconds of cranking,return the main switch to “ ” (on), wait10 seconds, then crank the engine
©2019 Yamaha M
otor Corporation, U.S.A.
Operation
33
again.
NOTE:
�
When the engine is cold, it needs to bewarmed up. For further information, seepage 33.
�
If the engine is warm and fails to start,open the throttle slightly and try to start theengine again. If the engine still fails to
start, see page 60.
EMU27670
Warming up engine
EMU27702
Electric start and prime start models
1. After starting the engine, allow it to idlefor 3 minutes to warm up. Failure to doso will shorten engine life.
2. Check for a steady flow of water from thecooling water pilot hole.
CAUTION:
ECM00511
A continuous flow of water from the cool-ing water pilot hole shows that the waterpump is pumping water through the cool-ing passages. If water is not flowing outof the hole at all times while the engine isrunning, overheating and serious dam-age could occur. Stop the engine andcheck whether the cooling water inlet onthe lower case or the cooling water pilothole is blocked. Consult your Yamahadealer if the problem cannot be located
and corrected.
EMU27740
Shifting
WARNING
EWM00180
Before shifting, make sure there are noswimmers or obstacles in the water near
you.
CAUTION:
ECM00220
To change the boat direction or shiftingposition from forward to reverse or vice-versa, first close the throttle so that the
engine idles (or runs at low speeds).
EMU27764
Forward (tiller handle and remote control models)
Tiller handle models1. Place the throttle grip in the fully closed
position.
2. Move the gear shift lever quickly and
ZMU03391
©2019 Yamaha M
otor Corporation, U.S.A.
Operation
34
firmly from neutral to forward.
Remote control models1. Pull up the neutral interlock trigger (if
equipped) and move the remote controllever quickly and firmly from neutral toforward.
EMU27785
Reverse (automatic reverse lock and power trim and tilt models)
WARNING
EWM00190
When operating in reverse, go slowly. Donot open the throttle more than half. Oth-erwise the boat could become unstable,which could result in loss of control and
an accident.
Tiller handle models1. Place the throttle grip in the fully closed
position.
2. Move the gear shift lever quickly andfirmly from neutral to reverse.
Remote control models1. Pull up the neutral interlock trigger (if
equipped) and move the remote controllever quickly and firmly from neutral toreverse.
EMU27820
Stopping engine
Before stopping the engine, first let it cool offfor a few minutes at idle or low speed. Stop-
©2019 Yamaha M
otor Corporation, U.S.A.
Operation
35
ping the engine immediately after operatingat high speed is not recommended.
EMU27844
Procedure
1. Push and hold the engine stop button orturn the main switch to “ ” (off).
2. After stopping the engine, disconnectthe fuel line if there is a fuel joint on theoutboard motor.
3. Tighten the air vent screw on the fueltank cap (if equipped).
4. Remove the key if the boat will be leftunattended.
NOTE:
The engine can also be stopped by pullingthe lanyard and removing the lock plate fromthe engine stop switch, then turning the main
switch to “ ” (off).
EMU27861
Trimming outboard motor
The trim angle of the outboard motor helpsdetermine the position of the bow of the boatin the water. Correct trim angle will help im-prove performance and fuel economy whilereducing strain on the engine. Correct trimangle depends upon the combination ofboat, engine, and propeller. Correct trim isalso affected by variables such as the load inthe boat, sea conditions, and running speed.
WARNING
EWM00740
Excessive trim for the operating condi-tions (either trim up or trim down) cancause boat instability and can makesteering the boat more difficult. This in-creases the possibility of an accident. Ifthe boat begins to feel unstable or is hardto steer, slow down and/or readjust the
trim angle.ZMU03108
ZMU02301
©2019 Yamaha M
otor Corporation, U.S.A.
Operation
36
EMU27882
Adjusting trim angle
Power trim and tilt models
WARNING
EWM00751
�
Be sure all people are clear of the out-board motor when adjusting the tilt an-gle, also be careful not to pinch anybody parts between the drive unit andclamp bracket.
�
Use caution when trying a trim positionfor the first time. Increase speed gradu-ally and watch for any signs of instabil-ity or control problems. Improper trimangle can cause loss of control.
�
If equipped with a power trim and tiltswitch located on the bottom cowling,use the switch only when the boat is ata complete stop with the engine off. Donot adjust the trim angle with this
switch while the boat is moving.
Adjust the outboard motor trim angle usingthe power trim and tilt switch.
To raise the bow (trim-out), press the switch“ ” (up).To lower the bow (trim-in), press the switch
1. Trim operating angle
ZMU03109
1
1. Power trim and tilt switch
1. Power trim and tilt switch
UPDN
ZMU03110
1
DOWN
UP
ZMU03096
©2019 Yamaha M
otor Corporation, U.S.A.
Operation
37
“ ” (down).Make test runs with the trim set to differentangles to find the position that works best foryour boat and operating conditions.
EMU27911
Adjusting boat trim
When the boat is on plane, a bow-up attituderesults in less drag, greater stability and effi-ciency. This is generally when the keel line ofthe boat is up about 3 to 5 degrees. With thebow up, the boat may have a greater tenden-cy to steer to one side or the other. Compen-sate for this as you steer. The trim tab canalso be adjusted to help offset this effect.When the bow of the boat is down, it is easierto accelerate from a standing start ontoplane.
Bow Up
Too much trim-out puts the bow of the boattoo high in the water. Performance and econ-omy are decreased because the hull of theboat is pushing the water and there is moreair drag. Excessive trim-out can also causethe propeller to ventilate, which reduces per-formance further, and the boat may “por-poise” (hop in the water), which could throwthe operator and passengers overboard.
Bow Down
Too much trim-in causes the boat to “plow”through the water, decreasing fuel economyand making it hard to increase speed. Oper-ating with excessive trim-in at higher speedsalso makes the boat unstable. Resistance atthe bow is greatly increased, heightening thedanger of “bow steering” and making opera-tion difficult and dangerous.
NOTE:
Depending on the type of boat, the outboardmotor trim angle may have little effect on the
trim of the boat when operating.
EMU27933
Tilting up and down
If the engine will be stopped for some time orif the boat is moored in shallows, the out-board motor should be tilted up to protect thepropeller and casing from damage by colli-sion with obstructions, and also to reduce
©2019 Yamaha M
otor Corporation, U.S.A.
Operation
38
salt corrosion.
WARNING
EWM00220
Be sure all people are clear of the out-board motor when tilting up and down,also be careful not to pinch any bodyparts between the drive unit and engine
bracket.
WARNING
EWM00250
Leaking fuel is a fire hazard. If there is afuel joint on the outboard motor, discon-nect the fuel line or close the fuel cock ifthe engine will be tilted for more than a
few minutes. Otherwise fuel may leak.
CAUTION:
ECM00241
�
Before tilting the outboard motor, stopthe engine by following the procedureon page 34. Never tilt the outboard mo-tor while the engine is running. Severedamage from overheating can result.
�
Do not tilt up the engine by pushing thetiller handle (if equipped) because this
could break the handle.
EMU28007
Procedure for tilting up (power trim and tilt models / power tilt models)
1. Place the remote control lever / gearshift lever in neutral.
2. Disconnect the fuel line from the out-board motor or close the fuel cock.
3. Press the power trim and tilt switch /power tilt switch “ ” (up) until the out-board motor has tilted up completely.
ZMU03108
UP
ZMU01935
UP
DN
©2019 Yamaha M
otor Corporation, U.S.A.
Operation
39
4. Push the tilt support knob into the clampbracket or pull the tilt support lever to-ward you to support the engine.
WARNING
EWM00260
After tilting the outboard motor, be sureto support it with the tilt support knob ortilt support lever. Otherwise the outboardmotor could fall back down suddenly if oilin the power trim and tilt unit loses pres-
sure.
5. Models equipped with trim rods: Oncethe outboard motor is supported with thetilt support lever, press the power trimand tilt switch / power tilt switch “ ”(down) to retract the trim rods.
CAUTION:
ECM00250
Be sure to retract the trim rods complete-ly during mooring. This protects the rodsfrom marine growth and corrosion whichcould damage the power trim and tilt
mechanism.
EMU28055
Procedure for tilting down (power trim and tilt models / power tilt models)
1. Push the power trim and tilt switch / pow-er tilt switch “ ” (up) until the outboardmotor is supported by the tilt rod and thetilt support lever / tilt support knob be-comes free.
2. Release the tilt support lever or pull outthe tilt support knob.
3. Push the power trim and tilt switch / pow-er tilt switch “ ” (down) to lower the out-board motor to the desired position.
UP
ZMU04993
ZMU03115
ZMU02569
©2019 Yamaha M
otor Corporation, U.S.A.
Operation
40
EMU28060
Cruising in shallow water
The outboard motor can be tilted up partiallyto allow operation in shallow water.
EMU28090
Power trim and tilt models / power tilt models
The outboard motor can be tilted up partially
to allow operation in shallow water.
WARNING
EWM00660
�
Place the gear shift in neutral beforesetting up for shallow water cruising.
�
Return the outboard motor to its normalposition as soon as the boat is back in
deeper water.
CAUTION:
ECM00260
Do not tilt the outboard motor up so thatthe cooling water inlet on the lower unit isabove the surface of the water when set-ting up for and cruising in shallow water.Otherwise severe damage from overheat-
ing can result.
EMU28185
Procedure for power trim and tilt / powertilt models
1. Place the remote control lever / gearshift lever in neutral.
DN
ZMU01936
UP
DN
DOWNZMU03410
©2019 Yamaha M
otor Corporation, U.S.A.
Operation
41
2. Slightly tilt the outboard motor up to thedesired position using the power trimand tilt switch / power tilt switch.
3. To return the outboard motor to the nor-mal running position, press the powertrim and tilt switch / power tilt switch andslowly tilt the outboard motor down.
EMU28192
Cruising in other conditions
Cruising in salt water
After operating in salt water, flush the cooling
water passages with fresh water to preventthem from becoming clogged with salt de-posits.
NOTE:
For cooling system flushing instructions, see
page 43.
Cruising in turbid water
Yamaha strongly recommends that you usethe optional chromium-plated water pump kit(not available for some models) if you usethe outboard motor in turbid or muddy waterconditions.
UP
ZMU01935
UP
DN
UP
ZMU03412
©2019 Yamaha M
otor Corporation, U.S.A.
42
Maintenance
EMU31480
SpecificationsNOTE:
“(AL)” stated in the specification data belowrepresents the numerical value for the alumi-num propeller installed.Likewise, “(SUS)” represents the value forstainless steel propeller installed and “(PL)”
for plastic propeller installed.
EMU28218
Dimension:
Overall length: 670 mm (26.4 in)
Overall width: 360 mm (14.2 in)
Overall height L: 1319 mm (51.9 in)
Transom height L: 533 mm (21.0 in)
Weight (without propeller) L: 86.0 kg (190 lb)
Performance:
Full throttle operating range: 4500–5500 r/min
Maximum output: 36.8 kW@5000 r/min (50 HP@5000 r/min)
Idling speed (in neutral): 800
±
50 r/min
Engine:
Type: 2-stroke L
Displacement: 698.0 cm
3
(42.59 cu.in)Bore
×
stroke: 67.0
×
66.0 mm (2.64
×
2.60 in)Ignition system:
CDISpark plug (NGK):
B8HS-10
Spark plug gap: 0.9–1.0 mm (0.035–0.039 in)
Control system: Remote control
Starting system: Electric
Starting carburetion system: Prime start
Min. cold cranking amps (CCA/SAE): 245.0 A
Min. marine cranking amps (MCA/ABYC): 323.0 A
Min. reserve capacity (RC/SAE): 52 minutes
Alternator output for battery DC: 6.0 A
Drive unit:
Gear positions: Forward-neutral-reverse
Gear ratio: 1.85 (24/13)
Trim and tilt system: Power trim and tilt
Propeller mark: G
Fuel and oil:
Recommended fuel: Regular unleaded gasoline
Min. pump octane: 86
Fuel tank capacity: 25 L (6.60 US gal) (5.50 Imp.gal)
Recommended engine oil: YAMALUBE 2-stroke outboard motor oil
Lubrication: Oil injection
Engine oil tank capacity: 1.5 L (1.59 US qt) (1.32 Imp.qt)
Recommended gear oil: Hypoid gear oil SAE#90
©2019 Yamaha M
otor Corporation, U.S.A.
Maintenance
43
Gear oil quantity: 430.0 cm
3
(14.54 US oz) (15.17 Imp.oz)
Tightening torque for engine:
Spark plug: 25.0 Nm (18.4 ft-lb) (2.55 kgf-m)
Propeller nut: 35.0 Nm (25.8 ft-lb) (3.57 kgf-m)
EMU28222
Transporting and storing outboard motor
WARNING
EWM00690
�
Leaking fuel is a fire hazard. Whentransporting and storing the outboardmotor, close the air vent screw and fuelcock to prevent fuel from leaking.
�
USE CARE when transporting fuel tank,whether in a boat or car.
�
DO NOT fill fuel container to maximumcapacity. Gasoline will expand consid-erably as it warms up and can build uppressure in the fuel container. This cancause fuel leakage and a potential fire
hazard.
WARNING
EWM00700
Never get under the lower unit while it istilted, even if a motor support bar is used.Severe injury could occur if the outboard
motor accidentally falls.
CAUTION:
ECM00660
Do not use the tilt support lever or knobwhen trailering the boat. The outboardmotor could shake loose from the tilt sup-port and fall. If the motor cannot be trail-ered in the normal running position, usean additional support device to secure it
in the tilt position.
The outboard motor should be trailered andstored in the normal running position. If thereis insufficient road clearance in this position,then trailer the outboard motor in the tilt po-sition using a motor support device such asa transom saver bar. Consult your Yamahadealer for further details.
EMU28235
Clamp screw mounting models
When transporting or storing the outboardmotor while removed from a boat, keep theoutboard motor in the attitude shown.
NOTE:
Place a towel or something similar under the
outboard motor to protect it from damage.
EMU30272
Storing outboard motor
When storing your Yamaha outboard motorfor prolonged periods of time (2 months orlonger), several important procedures mustbe performed to prevent excessive damage.It is advisable to have your outboard motorserviced by an authorized Yamaha dealerprior to storage. However, you, the owner,with a minimum of tools, can perform the fol-lowing procedures.
CAUTION:
ECM01411
�
Do not place the outboard motor on itsside before the cooling water hasdrained from it completely, otherwise
ZMU03122
©2019 Yamaha M
otor Corporation, U.S.A.
Maintenance
44
water may enter the cylinder throughthe exhaust port and cause engine trou-ble.
�
Store the outboard motor in a dry, well-
ventilated place, not in direct sunlight.
EMU28302
Procedure
EMU28372
Flushing in a test tank
1. Wash the outboard motor body usingfresh water. For further information, seepage 46.
2. Fill the fuel tank with fresh fuel and addone ounce of “Yamaha Fuel Conditionerand Stabilizer” (Part No. LUB-FUELC-12-00) to each gallon of fuel.
NOTE:
The use of “Yamaha Fuel Conditioner andStabilizer” eliminates the need to drain thefuel system. Consult your Yamaha dealer orother qualified mechanic if the fuel system is
to be drained instead.
3. Remove the engine top cowling and si-lencer cover.
4. Install the outboard motor on the testtank.
5. Fill the tank with fresh water to above the
level of the anti-cavitation plate.
CAUTION:
ECM00300
Do not run the engine without supplyingit with cooling water. Either the enginewater pump will be damaged or the en-gine will be damaged from overheating.Before starting the engine, be sure tosupply water to the cooling water passag-
es.
CAUTION:
ECM00290
If the fresh water level is below the levelof the anti-cavitation plate, or if the watersupply is insufficient, engine seizure may
occur.
6. Cooling system flushing is essential toprevent the cooling system from clog-ging up with salt, sand, or dirt. In addi-tion, fogging of the engine is mandatoryto prevent excessive engine damagedue to rust. Perform the flushing andfogging at the same time.
WARNING
EWM00090
�
Do not touch or remove electrical partswhen starting or during operation.
�
Keep hands, hair, and clothes awayfrom the flywheel and other rotating
parts while the engine is running.
7. Run the engine at a fast idle for 10–15minutes in neutral position.
8. Just prior to turning off the engine, quick-ly spray “Yamaha Stor-Rite EngineFogging Oil” (Part No. LUB-STRRT-12-00) alternately into each carburetor orthe fogging hole of the silencer cover, ifequipped. When properly done, the en-gine will smoke excessively and almoststall.
1. Water surface2. Lowest water level
ZMU02051
1
2
©2019 Yamaha M
otor Corporation, U.S.A.
Maintenance
45
9. Remove the outboard motor from thetest tank.
10. Drain the cooling water completely outof the motor. Clean the body thoroughly.
11. Install the silencer cover/cap and topcowling.
EMU28410
Lubrication (oil injection models)
1. Grease the spark plug threads and in-stall the spark plug(s) and torque toproper specification. For information onspark plug installation, see page 49.
2. Fill the oil tanks. This prevents the for-mation of condensation. For models witha remote oil tank, it may be necessary tomanually override the control unit tocompletely fill the engine oil tank.
3. Change the gear oil. For instructions,see page 55. Inspect the oil for the pres-ence of water which indicates a leakyseal. Seal replacement should be per-formed by an authorized Yamaha dealerprior to use.
4. Grease all grease fittings. For further de-tails, see page 49.
EMU28421
Cleaning and anticorrosion measures
1. Wash down the exterior of the outboardmotor with fresh water and dry off com-pletely.
2. Spray the outboard motor exterior with“Yamaha Silicone Protectant” (Part No.LUB-SILCNE-13-00).
3. Wax the cowling with a non-abrasivewax such as “Yamaha Silicone Wax”(Part No. ACC-11000-15-02).
EMU28430
Battery care
WARNING
EWM00330
Battery electrolytic fluid is dangerous; it
contains sulfuric acid and therefore ispoisonous and highly caustic.Always follow these preventive mea-sures:
�
Avoid bodily contact with electrolyticfluid as it can cause severe burns orpermanent eye injury.
�
Wear protective eye gear when han-dling or working near batteries.
Antidote (EXTERNAL):
�
SKIN - Flush with water.
�
EYES - Flush with water for 15 minutesand get immediate medical attention.
Antidote (INTERNAL):
�
Drink large quantities of water or milkfollowed by milk of magnesia, beatenegg, or vegetable oil. Get immediatemedical attention.
Batteries also generate explosive hydro-gen gas; therefore, you should alwaysfollow these preventive measures:
�
Charge batteries in a well-ventilated ar-ea.
�
Keep batteries away from fire, sparks,or open flames (for example: weldingequipment, lighted cigarettes, and soon.)
�
DO NOT SMOKE when charging or han-dling batteries.
KEEP BATTERIES AND ELECTROLYTIC
FLUID OUT OF REACH OF CHILDREN.
Batteries vary among manufacturers. There-fore the following procedures may not al-ways apply. Consult your batterymanufacturer’s instructions.Procedure1. Disconnect and remove the battery from
the boat. Always disconnect the blacknegative cable first to prevent the risk ofshorting.
2. Clean the battery casing and terminals.
©2019 Yamaha M
otor Corporation, U.S.A.
Maintenance
46
Fill each cell to the upper level with dis-tilled water.
3. Store the battery on a level surface in acool, dry, well-ventilated place out of di-rect sunlight.
4. Once a month, check the specific gravityof the electrolyte and recharge as re-quired to prolong battery life.
EMU28450
Cleaning the outboard motor
After use, wash the exterior of the outboardmotor with fresh water. Flush the coolingsystem with fresh water.
NOTE:
For cooling system flushing instructions, see
page 43.
EMU28460
Checking painted surface of motor
Check the motor for scratches, nicks, or flak-ing paint. Areas with damaged paint aremore likely to corrode. If necessary, cleanand paint the areas. A touch-up paint is avail-able from your Yamaha dealer.
EMU28486
Periodic maintenance
WARNING
EWM01070
Be sure to turn off the engine when youperform maintenance unless otherwisespecified. If you or the owner is not famil-iar with machine servicing, this work
should be done by your Yamaha dealer or
other qualified mechanic.
Maintenance, replacement, or repair ofthe emission control devices and sys-tems may be performed by any marineengine repair establishment or individual.All warranty repairs, however, includingthose to the emission control system,must be performed by an authorizedYamaha marine dealership.
A service manual is available for purchasethrough your Yamaha dealer for owners whohave the mechanical skills, tools, and otherequipment necessary to perform mainte-nance not covered by this owner’s manual.
EMU28510
Replacement parts
If replacement parts are necessary, use onlygenuine Yamaha parts or parts of the sametype and of equivalent strength and materi-als. Any part of inferior quality may malfunc-tion, and the resulting loss of control couldendanger the operator and passengers.Yamaha genuine parts and accessories areavailable from your Yamaha dealer.
ZMU03223
©2019 Yamaha M
otor Corporation, U.S.A.
Maintenance
47
EMU28522
Maintenance chart
Frequency of maintenance operations may be adjusted according to the operating condi-tions, but the following table gives general guidelines. Refer to the sections in this chapter forexplanations of each owner-specific action.
NOTE:
When operating in salt water, turbid or muddy water, the engine should be flushed with clean
water after each use.
The “ ” symbol indicates the check-ups which you may carry out yourself.The “ ” symbol indicates work to be carried out by your Yamaha dealer.
Item Actions
Initial Every
10 hours (1 month)
50 hours (3
months)
100 hours (6 months)
200 hours (1
year)
Anode(s) (external)Inspection / replace-ment
Anode(s) (internal)Inspection / replace-ment
Battery Inspection / charging
Cooling water pas-sages
Cleaning
Cowling clamp Inspection
Fuel filter (can be dis-assembled)
Inspection / cleaning
Fuel system Inspection
Fuel tank (Yamaha por-table tank)
Inspection / cleaning
Gear oil Change
Greasing points Greasing
Idling speed (carbure-tor models)
Inspection
Power trim and tilt unit Inspection
Propeller and cotter pinInspection / replace-ment
Shift link / shift cable Inspection / adjustment
ThermostatInspection / replace-ment
Throttle link / throttle cable / throttle pick-up timing
Inspection / adjustment
©2019 Yamaha M
otor Corporation, U.S.A.
Maintenance
48
Water pumpInspection / replace-ment
Oil pump Inspection / adjustment
Oil tank water drain Inspection / cleaning
Spark plug(s)Cleaning / adjustment / replacement
Item Actions
Initial Every
10 hours (1 month)
50 hours (3
months)
100 hours (6 months)
200 hours (1
year)©2019 Yamaha M
otor Corporation, U.S.A.
Maintenance
49
EMU28931
Greasing
Yamaha marine grease (Water resistant grease)
50
EMU28952
Cleaning and adjusting spark plug
WARNING
EWM00560
When removing or installing a spark plug,be careful not to damage the insulator. Adamaged insulator could allow externalsparks, which could lead to explosion or
fire.
The spark plug is an important engine com-ponent and is easy to inspect. The conditionof the spark plug can indicate somethingabout the condition of the engine. For exam-ple, if the center electrode porcelain is verywhite, this could indicate an intake air leak orcarburetion problem in that cylinder. Do notattempt to diagnose any problems yourself.Instead, take the outboard motor to a
ZMU03414
©2019 Yamaha M
otor Corporation, U.S.A.
Maintenance
50
Yamaha dealer. You should periodically re-move and inspect the spark plug becauseheat and deposits will cause the spark plugto slowly break down and erode. If electrodeerosion becomes excessive, or if carbon andother deposits are excessive, you should re-place the spark plug with another of the cor-rect type.
Before fitting the spark plug, measure theelectrode gap with a wire thickness gauge;adjust the gap to specification if necessary.
When fitting the plug, always clean the gas-ket surface and use a new gasket. Wipe offany dirt from the threads and screw in thespark plug to the correct torque.
NOTE:
If a torque-wrench is not available when you
are fitting a spark plug, a good estimate ofthe correct torque is 1/4 to 1/2 a turn past fin-ger-tight. Have the spark plug adjusted to thecorrect torque as soon as possible with a
torque-wrench.
EMU28962
Checking fuel system
WARNING
EWM00060
Gasoline and its vapors are highly flam-mable and explosive. Keep away fromsparks, cigarettes, flames, or other
sources of ignition.
WARNING
EWM00910
Leaking fuel can result in fire or explo-sion.
�
Check for fuel leakage regularly.
�
If any fuel leakage is found, the fuelsystem must be repaired by a qualifiedmechanic. Improper repairs can make
the outboard unsafe to operate.
Check the fuel lines for leaks, crack, or mal-function. If a problem is found, your Yamahadealer or other qualified mechanic should re-pair it immediately.
Standard spark plug:B8HS-10
1. Spark plug gap2. Spark plug I.D. mark (NGK)3. Spark plug part number
Spark plug gap:0.9–1.0 mm (0.035–0.039 in)
Spark plug torque:25.0 Nm (18.4 ft-lb) (2.55 kgf-m)
©2019 Yamaha M
otor Corporation, U.S.A.
Maintenance
51
Checkpoints
�
Fuel system parts leakage
�
Fuel line joint leakage
�
Fuel line cracks or other damage
�
Fuel connector leakage
EMU28980
Inspecting fuel filter
WARNING
EWM00310
Gasoline is highly flammable, and its va-pors are flammable and explosive.
�
If you have any question about properlydoing this procedure, consult yourYamaha dealer.
�
Do not perform this procedure on a hotor running engine. Allow the engine tocool.
�
There will be fuel in the fuel filter. Keepaway from sparks, cigarettes, flames orother sources of ignition.
�
This procedure will allow some fuel tospill. Catch fuel in a rag. Wipe up any
spilled fuel immediately.
�
The fuel filter must be reassembledcarefully with the O-ring, filter cup, andhoses in place. Improper assembly orreplacement could result in a fuel leak,which could result in a fire or explosion
hazard.
EMU29001
Cleaning fuel filter
1. Remove the nut holding the fuel filter as-sembly if equipped.
2. Unscrew the filter cup, catching anyspilled fuel in a rag.
3. Remove the filter element, and wash it insolvent. Allow it to dry. Inspect the filterelement and O-ring to make sure theyare in good condition. Replace them ifnecessary. If any water is found in thefuel, the Yamaha portable fuel tank orother fuel tanks should be checked andcleaned.
ZMU03126
1. Nut
ZMU03127
1
©2019 Yamaha M
otor Corporation, U.S.A.
Maintenance
52
4. Reinstall the filter element in the cup.Make sure the O-ring is in position in thecup. Firmly screw the cup onto the filterhousing.
5. Attach the filter assembly to the bracketso that the fuel hoses are attached to thefilter assembly.
6. Run the engine and check the filter andlines for leaks.
EMU29041
Inspecting idling speed
WARNING
EWM00451
�
Do not touch or remove electrical partswhen starting or during operation.
�
Keep hands, hair, and clothes awayfrom the flywheel and other rotating
parts while the engine is running.
CAUTION:
ECM00490
This procedure must be performed whilethe outboard motor is in the water. Aflushing attachment or test tank can be
used.
A diagnostic tachometer should be used forthis procedure. Results may vary depending
on whether testing is conducted with theflushing attachment, in a test tank, or with theoutboard motor in the water.1. Start the engine and allow it to warm up
fully in neutral until it is running smooth-ly.
NOTE:
Correct idling speed inspection is only possi-ble if the engine is fully warmed up. If notwarmed up fully, the idle speed will measurehigher than normal. If you have difficulty ver-ifying the idle speed, or the idle speed re-quires adjustment, consult a Yamaha dealer
or other qualified mechanic.
2. Verify whether the idle speed is set tospecification. For idle speed specifica-tions, see page 42.
EMU29061
Checking water in engine oil tank
A translucent water drain hose is connectedfrom the bottom of the oil tank to the fillerneck. If water or foreign matter collects in thishose, consult a Yamaha dealer.
EMU29112
Checking wiring and connectors
�
Check that each grounding wire is properlysecured.
�
Check that each connector is engaged se-
1. Filter cup2. Filter element3. Filter housing4. O-ring
ZMU02079
1
4
23
1. Drain hose2. Filler neck side
1
2
ZMU04989
©2019 Yamaha M
otor Corporation, U.S.A.
Maintenance
53
curely.
EMU29120
Exhaust leakage
Start the engine and check that no exhaustleaks from the joints between the exhaustcover, cylinder head, and body cylinder.
EMU29130
Water leakage
Start the engine and check that no waterleaks from the joints between the exhaustcover, cylinder head, and body cylinder.
EMU29163
Checking power trim and tilt / power tilt system
WARNING
EWM00430
�
Never get under the lower unit while itis tilted, even when the tilt support leveris locked. Severe injury could occur ifthe outboard motor accidentally falls.
�
Make sure no one is under the outboard
motor before performing this test.
1. Check the power trim and tilt unit / powertilt unit for any sign of oil leaks.
2. Operate each of the power trim and tiltswitches / power tilt switches to checkthat all switches work.
3. Tilt the outboard motor up and checkthat the trim and tilt rod / the tilt rod ispushed out completely.
4. Check that the trim and tilt rod / the tiltrod is free of corrosion or other flaws.
5. Tilt the outboard motor down. Checkthat the trim and tilt rod / the tilt rod oper-ates smoothly.
NOTE:
Consult your Yamaha dealer if any operation
is abnormal.
EMU29171
Checking propeller
WARNING
EWM00321
You could be seriously injured if the en-gine accidentally starts when you arenear the propeller.
�
Before inspecting, removing, or install-ing the propeller, remove the sparkplug caps from the spark plugs. Also,place the shift control in neutral, turnthe main switch to “ ” (off) and re-move the key, and remove the lanyardfrom the engine stop switch. Turn off
ZMU03240
1. Trim and tilt rod2. Tilt support lever
1
2
ZMU03417
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otor Corporation, U.S.A.
Maintenance
54
the battery cut-off switch if your boathas one.
�
Do not use your hand to hold the pro-peller when loosening or tightening thepropeller nut. Put a wood block be-tween the anti-cavitation plate and thepropeller to prevent the propeller from
turning.
Checkpoints
�
Check each of the propeller blades forwear, erosion from cavitation or ventila-tion, or other damage.
�
Check the propeller shaft for damage.
�
Check the splines / shear pin for wear ordamage.
�
Check for fish line tangled around the pro-peller shaft.
�
Check the propeller shaft oil seal for dam-age.
NOTE:
If the shear pin equipped: it is designed tobreak if the propeller hits a hard underwaterobstacle to help protect the propeller anddrive mechanism. The propeller will thenspin freely on the shaft. If this happens, the
shear pin must be replaced.
EMU30660
Removing the propeller
EMU29194
Spline models
1. Straighten the cotter pin and pull it outusing a pair of pliers.
2. Remove the propeller nut, washer, andspacer (if equipped).
ZMU01896
ZMU01897
1. Cotter pin2. Propeller nut3. Washer4. Spacer
ZMU03131
1
23
56
4
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otor Corporation, U.S.A.
Maintenance
55
3. Remove the propeller and thrust wash-er.
EMU30670
Installing the Propeller
EMU29231
Spline models
CAUTION:
ECM00340
�
Be sure to install the thrust washer be-fore installing the propeller, otherwisethe lower case and propeller bosscould be damaged.
�
Be sure to use a new cotter pin andbend the ends over securely. Otherwisethe propeller could come off during op-
eration and be lost.
1. Apply Yamaha marine grease or a cor-rosion resistant grease to the propellershaft.
2. Install the spacer (if equipped), thrustwasher, and propeller on the propellershaft.
3. Install the spacer (if equipped) and thewasher. Tighten the propeller nut to thespecified torque.
4. Align the propeller nut with the propellershaft hole. Insert a new cotter pin in thehole and bend the cotter pin ends.
NOTE:
If the propeller nut does not align with thepropeller shaft hole after tightening to thespecified torque, tighten the nut further to
align it with the hole.
EMU29282
Changing gear oil
WARNING
EWM00800
�
Be sure the outboard motor is securelyfastened to the transom or a stablestand. You could be severely injured ifthe outboard motor falls on you.
�
Never get under the lower unit while itis tilted, even when the tilt support leveror knob is locked. Severe injury couldoccur if the outboard motor accidental-
ly falls.
1. Tilt the outboard motor so that the gearoil drain screw is at the lowest point pos-sible.
2. Place a suitable container under thegear case.
3. Remove the gear oil drain screw andgasket.
NOTE:
�
If a magnetic gear oil drain screw is
5. Propeller6. Thrust washer
1. Gear oil drain screw2. Oil level plug
ZMU03133
2
1
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otor Corporation, U.S.A.
Maintenance
56
equipped, remove all metal particles fromthe screw before installing it.
�
Always use new gaskets. Do not reuse the
removed gaskets.
4. Remove the oil level plug and gasket toallow the oil to drain completely.
CAUTION:
ECM00710
Inspect the used oil after it has beendrained. If the oil is milky, water is gettinginto the gear case which can cause geardamage. Consult a Yamaha dealer for re-
pair of the lower unit seals.
NOTE:
For disposal of used oil, consult your
Yamaha dealer.
5. With the outboard motor in a vertical po-sition, and using a flexible or pressur-ized filling device, inject the gear oil intothe gear oil drain screw hole.
6. Put a new gasket on the oil level plug.When the oil begins to flow out of the oillevel plug hole, insert and tighten the oil
level plug.7. Put a new gasket on the gear oil drain
screw. Insert and tighten the gear oildrain screw.
EMU29302
Cleaning fuel tank
WARNING
EWM00920
Gasoline is highly flammable, and its va-pors are flammable and explosive.
�
If you have any question about properlydoing this procedure, consult yourYamaha dealer.
�
Keep away from sparks, cigarettes,flames, or other sources of ignitionwhen cleaning the fuel tank.
�
Remove the fuel tank from the boat be-fore cleaning it. Work only outdoors inan area with good ventilation.
�
Wipe up any spilled fuel immediately.
�
Reassemble the fuel tank carefully. Im-proper assembly can result in a fuelleak, which could result in a fire or ex-plosion hazard.
�
Dispose of old gasoline according to lo-
cal regulations.
1. Empty the fuel tank into an approvedcontainer.
2. Pour a small amount of suitable solventinto the tank. Install the cap and shakethe tank. Drain the solvent completely.
3. Remove the screws holding the fuel jointassembly. Pull the assembly out of thetank.
Recommended gear oil:Hypoid gear oil SAE#90
Gear oil quantity:430.0 cm
3
(14.54 US oz) (15.17 Imp.oz)
ZMU03132
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otor Corporation, U.S.A.
Maintenance
57
4. Clean the filter (located on the end of thesuction pipe) in a suitable cleaning sol-vent. Allow the filter to dry.
5. Replace the gasket with a new one. Re-install the fuel joint assembly and tightenthe screws firmly.
EMU29312
Inspecting and replacing anode(s)
Yamaha outboard motors are protected fromcorrosion by sacrificial anodes. Inspect theexternal anodes periodically. Remove scalesfrom the surfaces of the anodes. Consult aYamaha dealer for replacement of externalanodes.
CAUTION:
ECM00720
Do not paint anodes, as this would render
them ineffective.
NOTE:
Inspect ground leads attached to externalanodes on equipped models. Consult aYamaha dealer for inspection and replace-ment of internal anodes attached to the pow-
er unit.
EMU29320
Checking battery (for electric start models)
WARNING
EWM00330
Battery electrolytic fluid is dangerous; itcontains sulfuric acid and therefore ispoisonous and highly caustic.Always follow these preventive mea-sures:
�
Avoid bodily contact with electrolytic
ZMU03232 ZMU03134
ZMU03135
ZMU03418
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otor Corporation, U.S.A.
Maintenance
58
fluid as it can cause severe burns orpermanent eye injury.
�
Wear protective eye gear when han-dling or working near batteries.
Antidote (EXTERNAL):
�
SKIN - Flush with water.
�
EYES - Flush with water for 15 minutesand get immediate medical attention.
Antidote (INTERNAL):
�
Drink large quantities of water or milkfollowed by milk of magnesia, beatenegg, or vegetable oil. Get immediatemedical attention.
Batteries also generate explosive hydro-gen gas; therefore, you should alwaysfollow these preventive measures:
�
Charge batteries in a well-ventilated ar-ea.
�
Keep batteries away from fire, sparks,or open flames (for example: weldingequipment, lighted cigarettes, and soon.)
�
DO NOT SMOKE when charging or han-dling batteries.
KEEP BATTERIES AND ELECTROLYTIC
FLUID OUT OF REACH OF CHILDREN.
CAUTION:
ECM00360
�
A poorly maintained battery will quicklydeteriorate.
�
Ordinary tap water contains mineralsharmful to a battery, and should not be
used for topping up.
1. Check the electrolyte level at least oncea month. Fill to the manufacturer’s rec-ommended level when necessary. Topup only with distilled water (or pure de-ionized water suitable to use in batter-ies).
2. Always keep the battery in a good stateof charge. Installing a voltmeter will helpyou monitor your battery. If you will notuse the boat for a month or more, re-move the battery from the boat and storeit in a cool, dark place. Completely re-charge the battery before using it.
3. If the battery will be stored for longerthan a month, check the specific gravityof the fluid at least once a month and re-charge the battery when it is low.
NOTE:
Consult a Yamaha dealer when charging or
re-charging batteries.
EMU29331
Connecting the battery
WARNING
EWM00570
Mount the battery holder securely in adry, well-ventilated, vibration-free loca-tion in the boat. Install a fully charged bat-
tery in the holder.
CAUTION:
ECM01121
�
Make sure the main switch (on applica-ble models) is “ ” (off) before work-ing on the battery.
�
Reversal of the battery cables will dam-age the electrical parts.
�
Connect the red battery cable first
©2019 Yamaha M
otor Corporation, U.S.A.
Maintenance
59
when installing the battery and discon-nect the black battery cable first whenremoving it. Otherwise, the electricalparts can be damaged.
�
The electrical contacts of the batteryand cables must be clean and properlyconnected, or the battery will not start
the engine.
Connect the red battery cable to the POSI-TIVE (+) terminal first. Then connect theblack battery cable to the NEGATIVE (-) ter-minal.
EMU29370
Disconnecting the battery
Disconnect the BLACK cable from the NEG-ATIVE (-) terminal first. Then disconnect theRED cable from the POSITIVE (+) terminal.
EMU29390
Checking top cowling
Check the fitting of the top cowling by push-ing it with both hands. If it is loose have it re-paired by your Yamaha dealer.
EMU29400
Coating the boat bottom
A clean hull improves boat performance. Theboat bottom should be kept as clean of ma-rine growth as possible. If necessary, theboat bottom can be coated with an anti-foul-ing paint approved for your area to inhibitmarine growth.Do not use anti-fouling paint which includescopper or graphite. These paints can causemore rapid engine corrosion.
1. Red cable2. Black cable3. Battery
ZMU04678
ZMU01943
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otor Corporation, U.S.A.
60
Trouble Recovery
EMU29424
Troubleshooting
A problem in the fuel, compression, or igni-tion systems can cause poor starting, loss ofpower, or other problems. This section de-scribes basic checks and possible remedies,and covers all Yamaha outboard motors.Therefore some items may not apply to yourmodel.If your outboard motor requires repair, bringit to your Yamaha dealer.If the engine trouble warning indicator isflashing, consult your Yamaha dealer.
Starter will not operate.
Q. Is battery capacity weak or low?A. Check battery condition. Use battery ofrecommended capacity.
Q. Are battery connections loose or corrod-ed?A. Tighten battery cables and clean batteryterminals.
Q. Is fuse for electric start relay or electric cir-cuit blown?A. Check for cause of electric overload andrepair. Replace fuse with one of correct am-perage.
Q. Are starter components faulty?A. Have serviced by a Yamaha dealer.
Q. Is shift lever in gear?A. Shift to neutral.
Engine will not start (starter operates).
Q. Is fuel tank empty?A. Fill tank with clean, fresh fuel.
Q. Is fuel contaminated or stale?
A. Fill tank with clean, fresh fuel.
Q. Is fuel filter clogged?A. Clean or replace filter.
Q. Is starting procedure incorrect?A. See page 30.
Q. Has fuel pump malfunctioned?A. Have serviced by a Yamaha dealer.
Q. Are spark plug(s) fouled or of incorrecttype?A. Inspect spark plug(s). Clean or replacewith recommended type.
Q. Are spark plug cap(s) fitted incorrectly?A. Check and re-fit cap(s).
Q. Is ignition wiring damaged or poorly con-nected?A. Check wires for wear or breaks. Tightenall loose connections. Replace worn or bro-ken wires.
Q. Are ignition parts faulty?A. Have serviced by a Yamaha dealer.
Q. Is engine stop switch lanyard not at-tached?A. Attach lanyard.
Q. Are engine inner parts damaged?A. Have serviced by a Yamaha dealer.
Engine idles irregularly or stalls.
Q. Are spark plug(s) fouled or of incorrecttype?A. Inspect spark plug(s). Clean or replacewith recommended type.
©2019 Yamaha M
otor Corporation, U.S.A.
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61
Q. Is fuel system obstructed?A. Check for pinched or kinked fuel line orother obstructions in fuel system.
Q. Is fuel contaminated or stale?A. Fill tank with clean, fresh fuel.
Q. Is fuel filter clogged?A. Clean or replace filter.
Q. Have ignition parts failed?A. Have serviced by a Yamaha dealer.
Q. Has warning system activated?A. Find and correct cause of warning.
Q. Is spark plug gap incorrect?A. Inspect and adjust as specified.
Q. Is ignition wiring damaged or poorly con-nected?A. Check wires for wear or breaks. Tightenall loose connections. Replace worn or bro-ken wires.
Q. Is specified engine oil not being used?A. Check and replace oil as specified.
Q. Is thermostat faulty or clogged?A. Have serviced by a Yamaha dealer.
Q. Are carburetor adjustments incorrect?A. Have serviced by a Yamaha dealer.
Q. Is fuel pump damaged?A. Have serviced by a Yamaha dealer.
Q. Is air vent screw on fuel tank closed?A. Open air vent screw.
Q. Is choke knob pulled out?
A. Return to home position.
Q. Is motor angle too high?A. Return to normal operating position. Q. Is carburetor clogged?A. Have serviced by a Yamaha dealer.
Q. Is fuel joint connection incorrect?A. Connect correctly.
Q. Is throttle valve adjustment incorrect?A. Have serviced by a Yamaha dealer.
Q. Is battery cable disconnected?A. Connect securely.
Warning buzzer sounds or indicatorlights.
Q. Is cooling system clogged?A. Check water intake for restriction.
Q. Is engine oil level low?A. Fill oil tank with specified engine oil.
Q. Is heat range of spark plug incorrect?A. Inspect spark plug and replace it with rec-ommended type.
Q. Is specified engine oil not being used?A. Check and replace oil with specified type.
Q. Is engine oil contaminated or deteriorat-ed?A. Replace oil with fresh, specified type.
Q. Is oil filter clogged?A. Have serviced by a Yamaha dealer.
Q. Has oil feed/injection pump malfunc-tioned?
©2019 Yamaha M
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Trouble Recovery
62
A. Have serviced by a Yamaha dealer.
Q. Is load on boat improperly distributed?A. Distribute load to place boat on an evenplane.
Q. Is water pump or thermostat faulty?A. Have serviced by a Yamaha dealer.
Q. Is there excess water in fuel filter cup?A. Drain filter cup.
Engine power loss.
Q. Is propeller damaged?A. Have propeller repaired or replaced.
Q. Is propeller pitch or diameter incorrect?A. Install correct propeller to operate out-board at its recommended speed (r/min)range.
Q. Is trim angle incorrect?A. Adjust trim angle to achieve most efficientoperation.
Q. Is motor mounted at incorrect height ontransom?A. Have motor adjusted to proper transomheight.
Q. Has warning system activated?A. Find and correct cause of warning.
Q. Is boat bottom fouled with marine growth?A. Clean boat bottom.
Q. Are spark plug(s) fouled or of incorrecttype?A. Inspect spark plug(s). Clean or replacewith recommended type.
Q. Are weeds or other foreign matter tangledon gear housing?A. Remove foreign matter and clean lowerunit.
Q. Is fuel system obstructed?A. Check for pinched or kinked fuel line orother obstructions in fuel system.
Q. Is fuel filter clogged?A. Clean or replace filter.
Q. Is fuel contaminated or stale?A. Fill tank with clean, fresh fuel.
Q. Is spark plug gap incorrect?A. Inspect and adjust as specified.
Q. Is ignition wiring damaged or poorly con-nected?A. Check wires for wear or breaks. Tightenall loose connections. Replace worn or bro-ken wires.
Q. Have electrical parts failed?A. Have serviced by a Yamaha dealer.
Q. Is specified fuel not being used?A. Replace fuel with specified type.
Q. Is specified engine oil not being used?A. Check and replace oil with specified type.
Q. Is thermostat faulty or clogged?A. Have serviced by a Yamaha dealer.
Q. Is air vent screw closed?A. Open the air vent screw.
Q. Is fuel pump damaged?A. Have serviced by a Yamaha dealer.
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otor Corporation, U.S.A.
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63
Q. Is fuel joint connection incorrect?A. Connect correctly.
Q. Is heat range of spark plug incorrect?A. Inspect spark plug and replace it with rec-ommended type.
Q. Is high pressure fuel pump drive belt bro-ken?A. Have serviced by a Yamaha dealer.
Q. Is engine not responding properly to shiftlever position?A. Have serviced by a Yamaha dealer.
Engine vibrates excessively.
Q. Is propeller damaged?A. Have propeller repaired or replaced.
Q. Is propeller shaft damaged?A. Have serviced by a Yamaha dealer.
Q. Are weeds or other foreign matter tangledon propeller?A. Remove and clean propeller.
Q. Is motor mounting bolt loose?A. Tighten bolt.
Q. Is steering pivot loose or damaged?A. Tighten or have serviced by a Yamahadealer.
EMU29433
Temporary action in emergency
EMU29440
Impact damage
WARNING
EWM00870
The outboard motor can be seriously
damaged by a collision while operating ortrailering. Damage could make the out-
board motor unsafe to operate.
If the outboard motor hits an object in the wa-ter, follow the procedure below.
1. Stop the engine immediately.2. Inspect the control system and all com-
ponents for damage. Also inspect theboat for damage.
3. Whether damage is found or not, returnto the nearest harbor slowly and careful-ly.
4. Have a Yamaha dealer inspect the out-board motor before operating it again.
EMU29462
Replacing fuse
If the fuse has blown on an electric startmodel, open the fuse holder and replace thefuse with a new one of the proper amperage.
WARNING
EWM00630
Be sure to use the specified fuse. An in-correct fuse or a piece of wire could allowexcessive current flow. This could cause
electric system damage and a fire hazard.
©2019 Yamaha M
otor Corporation, U.S.A.
Trouble Recovery
64
NOTE:
Consult your Yamaha dealer if the new fuse
immediately blows again.
EMU29522
Power trim and tilt / power tilt will not operate
If the engine cannot be tilted up or down withthe power trim and tilt / the power tilt becauseof a discharged battery or a failure with thepower trim and tilt unit / the power tilt unit, theengine can be tilted manually.1. Loosen the manual valve screw by turn-
ing it counterclockwise until it stops.
2. Put the engine in the desired position,
then tighten the manual valve screw byturning it clockwise.
EMU29532
Starter will not operate
If the starter mechanism does not operate(the engine cannot be cranked with the start-er), the engine can be started with an emer-gency starter rope.
WARNING
EWM01021
�
Use this procedure only in an emergen-cy to return to the nearest port for re-pairs.
�
When the emergency starter rope isused to start the engine, the start-in-gear protection device does not oper-ate. Make sure the remote control leveris in neutral. Otherwise the boat couldunexpectedly start to move, whichcould result in an accident.
�
Attach the engine stop switch lanyardto a secure place on your clothing, oryour arm or leg while operating theboat.
�
Do not attach the lanyard to clothingthat could tear loose. Do not route thecord where it could become entangled,preventing it from functioning.
�
Avoid accidentally pulling the lanyardduring normal operation. Loss of en-gine power means the loss of moststeering control. Also, without enginepower, the boat could slow rapidly. Thiscould cause people and objects in theboat to be thrown forward.
�
Make sure no one is standing behindyou when pulling the starter rope. Itcould whip behind you and injuresomeone.
�
An unguarded, rotating flywheel is verydangerous. Keep loose clothing and
1. Fuse holder2. Fuse (20 A)3. Spare fuse (20 A)
1. Manual valve screw
1 2
3 ZMU03421
1
ZMU03422
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Trouble Recovery
65
other objects away when starting theengine. Use the emergency starter ropeonly as instructed. Do not touch the fly-wheel or other moving parts when theengine is running. Do not install thestarter mechanism or top cowling afterthe engine is running.
�
Do not touch the ignition coil, sparkplug wire, spark plug cap, or other elec-trical components when starting or op-erating the motor. You could get an
electrical shock.
EMU29573
Emergency starting engine
1. Remove the top cowling.2. Disconnect the start-in-gear protection
cable from the starter, if equipped.
3. Remove the starter/flywheel cover afterremoving the bolt(s).
4. Prepare the engine for starting. For fur-ther information, see page 30. Be sure
the engine is in neutral and that the en-gine stop switch lanyard lock plate is at-tached to the engine stop switch. Themain switch must be “ ” (on), ifequipped.
5. Insert the knotted end of the emergencystarter rope into the notch in the flywheelrotor and wind the rope several turnsaround the flywheel clockwise.
6. Pull the rope slowly until resistance isfelt.
7. Give a strong pull straight out to crankand start the engine. Repeat if neces-sary.
ZMU03425
ZMU03139
ZMU03140
OFF
ZMU03541
ON
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otor Corporation, U.S.A.
Trouble Recovery
66
NOTE:
When the engine does not start with this pro-
cedure, see page 66.
EMU29670
Engine fails to operate
EMU29704
Cold engine fails to start
If the engine fails to start when it is cold, usethe following procedure.
WARNING
EWM00410
When starting or operating the engine, donot touch the ignition coil, spark plugwire, spark plug cap, or other electricalparts carrying high voltage. Keep looseclothing and other objects away from theengine when starting it. Do not touch theflywheel or other moving parts when the
engine is running.
1. Adjust the trim angle so that the driveshaft is at right angles to the water sur-face or is trimmed in.
2. On models equipped with an emergencystarter valve, open it. The valve is locat-ed behind the silencer cover on the frontof the engine.
3. Squeeze the primer pump two or threetimes to feed fuel.
4. Open the throttle slightly without shiftingusing the throttle grip, neutral throttle le-ver or free accelerator. It is necessary tochange the throttle opening slightly de-pending on the engine temperature. Af-ter the engine starts, return the throttle toits original position.
5. Turn the main switch to “ ” (on).
ZMU03429 ZMU03141
OPEN
CLOSE
ZMU03142
N
ZMU03143
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otor Corporation, U.S.A.
Trouble Recovery
67
6. Turn the main switch to “ ” (start).
CAUTION:
ECM00191
�
Never turn the main switch to “ ”(start) while the engine is running.
�
Do not keep the starter motor turningfor more than 5 seconds. If the startermotor is turned continuously for morethan 5 seconds, the battery will bequickly discharged, thus making it im-possible to start the engine. The startercan also be damaged. If the engine willnot start after 5 seconds of cranking,return the main switch to “ ” (on), wait10 seconds, then crank the engine
again.
7. After the engine starts, close the emer-gency starter valve (if used), then returnthe throttle to its original position.
NOTE:
When the starter mechanism malfunctions,
see page 64.
EMU29760
Treatment of submerged motor
If the outboard motor is submerged, immedi-ately take it to a Yamaha dealer. Otherwisesome corrosion may begin almost immedi-ately.If you cannot immediately take the outboardmotor to a Yamaha dealer, follow the proce-dure below in order to minimize engine dam-age.
EMU29771
Procedure
1. Thoroughly wash away mud, salt, sea-weed, and so on, with fresh water.
2. Remove the spark plugs and face thespark plug holes downward to allow anywater, mud, or contaminants to drain.
ON STARTOFF
ZMU03144
ZMU03335
ON STARTOFF
ZMU03145
OPENCLOSE
ZMU01909
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68
3. Drain the fuel from the carburetor, fuelfilter, and fuel line.
4. Feed fogging oil or engine oil throughthe carburetor(s) and spark plug holeswhile cranking with the manual starter oremergency starter rope.
5. Take the outboard motor to a Yamahadealer as soon as possible.
CAUTION:
ECM00400
Do not attempt to run the outboard motor
until it has been completely inspected.
ZMU01910
ZMU01911
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otor Corporation, U.S.A.
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Consumer information
EMU29811
Important warranty information for U.S.A. and Canada
©2019 Yamaha M
otor Corporation, U.S.A.
Consumer information
70
©2019 Yamaha M
otor Corporation, U.S.A.
Consumer information
71
EMU29820
YAMAHA MOTOR CORPORATION, U.S.A. OUTBOARD MOTOR TWO YEAR LIMITED WARRANTY
©2019 Yamaha M
otor Corporation, U.S.A.
Consumer information
72
©2019 Yamaha M
otor Corporation, U.S.A.
Consumer information
73
©2019 Yamaha M
otor Corporation, U.S.A.
Consumer information
74
EMU29841
IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA
©2019 Yamaha M
otor Corporation, U.S.A.
63B-9-1F Hyoshi 06.2.16 9:21 ページ 3
©2019 Yamaha M
otor Corporation, U.S.A.
63B-9-1F Hyoshi 06.2.16 9:21 ページ 3
©2019 Yamaha M
otor Corporation, U.S.A.
Printed in JapanApril 2006–0.8 × 1 ! Printed on recycled paper
63B-9-1F Hyoshi 06.2.16 9:21 ページ 4
©2019 Yamaha M
otor Corporation, U.S.A.
YAMAHA MOTOR CO., LTD.MADE IN JAPANPAYS D'ORIGINE JAPON
OUTBOARD MOTOR WARRANTY REGISTRATION
ENREGISTREMENT DE LA GARANTIE DU MOTEUR HORS-BORD
Please complete and mail this card. This information is necessary to accurately register your unit for warranty.Veuillez signer ci-dessous pour attester que le montage et l’inspection ont été faits dans le respect des directives d’inspection et
que la marche à suivre pour la garantie et l’entretien a été expliquée à l’acheteur au détail.
OUTBOARD MOTOR MODEL AND SERIAL NUMBER (From I.D. label on clamp bracket)MODÉLE ET NO. DE SÉRIE DU MOTEUR HORS-BORD (sur l’étiquette d’identification de la presse de fixation)
(For Dealer Use Only)(A l’usage du concessionnaire)YAMAHA DEALER NUMBERNO. DU CONCESSIONNAIRE YAMAHA
DEALER NAMENOM DU CONCESSIONNAIRE
DATE SOLDDATE DELIVRAISON
OWNER’S NAMENOM DUPROPRIÉTAIRE
ADDRESSADRESSE
PHONE NUMBER ( )NUMÉRO DE TÉLÉPHONE
USAGE(Check One)UTILISATION(En cocher un.)
PLEASURELOISIRCOMMERCIALCOMMERCIAL
MONTH DAY YEARMOIS JOUR ANNÉE
FIRST LASTPRÉNOM NOM DE FAMILLE
STREETRUE
CITY STATE/PROVINCE ZIPVILLE PROVINCE CODE POSTAL
Warranty card-04 2/17/03 2:41 PM Page 1©2019 Yamaha M
otor Corporation, U.S.A.
PLACEPOSTAGEHERE
ATTN: WARRANTY DEPARTMENT
Warranty card-04 2/17/03 2:41 PM Page 2©2019 Yamaha M
otor Corporation, U.S.A.