Printed in JapanMarch 2003-0.5 × 1 !63V-28199-16(9.9FMH, 15FMH)(E)

Printed on recycled paper

9.9C15C

OWNER’S MANUAL

U.S.A.EditionLIT-18626-05-34

63V-9-16 Hyoshi 2/18/03 13:52 Page 1

63V-9-16 Hyoshi 2/18/03 13:52 Page 2

Thank you for choosing a Yamaha out-board motor. This Owner’s manual con-tains information needed for proper oper-ation, maintenance and care. A thoroughunderstanding of these simple instruc-tions will help you obtain maximumenjoyment from your new Yamaha. If youhave any question about the operation ormaintenance of your outboard motor,please consult a Yamaha dealer.

In this Owner’s Manual particularlyimportant information is distinguished inthe following ways.

QThe Safety Alert Symbol meansATTENTION! BECOME ALERT!YOUR SAFETY IS INVOLVED!

wFailure to follow WARNING instructions

could result in severe injury or death to

the machine operator, a bystander, or a

person inspecting or repairing the out-

board motor.

cCA CAUTION indicates special precautions

that must be taken to avoid damage to

the outboard motor.

NOTE:

A NOTE provides key information to makeprocedures easier or clearer.

* Yamaha continually seeks advance-ments in product design and quality.Therefore, while this manual containsthe most current product informationavailable at the time of printing, theremay be minor discrepancies betweenyour machine and this manual. If thereis any question concerning this manual,please consult your Yamaha dealer.

NOTE:

The 15MH and its standard accessoriesare used as a base for the explanationsand illustrations in this manual. There-fore, some items may not apply to everymodel.

EMU01448

TO THE OWNER

EMU01446

9.9C, 15C

OWNER'S MANUAL

©2003 by Yamaha Motor Corporation, USA

1st Edition, March 2003

All rights reserved.

Any reprinting or unauthorized use

without the written permission of

Yamaha Motor Corporation, USA

is expressly prohibited.

Printed in Japan

P/N LIT-18626-05-34

E

63V-9-16-1 2/18/03 13:56 Page 1

GENERAL INFORMATION

BASIC COMPONENTS

OPERATION

MAINTENANCE

TROUBLE RECOVERY

INDEX

CONTENTS

READ THIS OWNER’S MANUAL CAREFULLY

BEFORE OPERATING YOUR OUTBOARD MOTOR.

E

1

2

3

4

5

6

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2

3

4

5

6

EMB00010

Chapter 1

GENERAL

INFORMATION

IDENTIFICATION NUMBERS

RECORD ....................................................1-1Outboard motor serial number...........1-1

EMISSION CONTROL INFORMATION...1-2

SAFETY INFORMATION..........................1-3

IMPORTANT LABELS ..............................1-5

BASIC BOATING RULES .........................1-6

FUELING INSTRUCTIONS.....................1-10Gasoline ..............................................1-11Engine oil ............................................1-11

PROPELLER SELECTION .......................1-12

START-IN-GEAR PROTECTION ............1-13

1

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EMU00005

IDENTIFICATION NUMBERS

RECORD

EMU00007

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 num-ber in the spaces provided to assist you inordering spare parts from your Yamahadealer or for reference in case your out-board motor is stolen.

1 Outboard motor serial number

E

1

401012

YAMAHA MOTOR CO., LTD.MADE IN JAPANPAYS D'ORIGINE JAPON

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q

w 108015*

EMU01385

EMISSION CONTROL

INFORMATION

EMU01386

NORTH AMERICAN MODELS

This engine conforms to U.S. Environ-mental Protection Agency (EPA) regula-tions for marine SI engines. See the labelaffixed to your engine for details.

Approval label of Emission control

certificate

This label is attached to the bottom cowl-ing.

1 Emission control information label

Existing Technology ; N/A

Manufactured date label

This label is attached to the clamp bracketor the swivel bracket.

2 Manufactured date label

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 EX

cmkw

g/kw-hr rpm IN NEUTRAL

3

Manufactured:

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8 This product emits exhaust gases whichcontain carbon monoxide, a colorless,odorless gas which may cause braindamage or death when inhaled. Symp-toms include nausea, dizziness, anddrowsiness. Keep cockpit and cabinareas well ventilated. Avoid blockingexhaust outlets.8 Check throttle, shift, and steering for

proper operation before starting theengine.8 Attach the engine stop switch lanyard

to a secure place on your clothing, oryour arm or leg while operating. If youaccidentally leave the helm, the lanyardwill pull from the switch, stopping theengine.8 Know the marine laws and regulations

where you will be boating - and obeythem. Refer to the “RULES OF THEROAD” section for basic boating rules.8 Stay informed about the weather.

Check weather forecasts before boating.Avoid boating in hazardous weather.8 Tell someone where you are going:

leave a Float Plan with a responsibleperson. Be sure to cancel the Float Planwhen you return.8 Use common sense and good judgment

when boating. Know your abilities, andbe sure you understand how your boathandles under the different boatingconditions you may encounter. Operatewithin your limits, and the limits of yourboat. Always operate at safe speeds,and keep a careful watch for obstaclesand other traffic.8 Always watch carefully for swimmers

during the engine operation.8 Stay away from swimming areas.8When a swimmer is in the water near

you shift into neutral and shut off theengine.

EMU00917

SAFETY

INFORMATION

8 Before mounting or operating the out-board motor, read this entire manual.Reading it should give you an under-standing of the motor and its operation.8 Before operating the boat, read any

owner’s or operator’s manuals suppliedwith it and all labels. Be sure you under-stand each item before operating.8 Do not overpower the boat with this

outboard motor. Overpowering theboat could result in loss of control. Therated power of the outboard should beequal to or less than the rated horse-power capacity of the boat. If the ratedhorsepower capacity of the boat isunknown, consult the dealer or boatmanufacturer.8 Do not modify the outboard. Modifica-

tions could make the motor unfit orunsafe to use.8 Never operate after drinking alcohol or

taking drugs. About 50% of all boatingfatalities involve intoxication.8 Have an approved personal flotation

device (PFD) on board for every occu-pant. It is a good idea to wear a PFDwhenever boating. At a minimum, chil-dren and non-swimmers should alwayswear PFDs, and everyone should wearPFDs when there are potentially haz-ardous boating conditions.8 Gasoline is highly flammable, and its

vapors are flammable and explosive.Handle and store gasoline carefully.Make sure there are no gas fumes orleaking fuel before starting the engine.

Q

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8 Be informed about boating safety. Addi-tional publications and information canbe obtained from many organizations,including the following:

United States Coast Guard

Consumer Affairs Staff (G-BC)Office of Boating, Public, and ConsumerAffairsU.S. Coast Guard HeadquartersWashington, D.C. 20593-0001Boating Safety Hotline: 1-800-368-5647

National Marine Manufacturers

Association (NMMA)

401 N. Michigan Ave.Chicago, Il 60611

Marine Retailers Association of America

155 N. Michigan Ave.Chicago, Il 60601

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EMB30010

IMPORTANT LABELSWARNING LABELS

1

2

202012*

q

w

WARNINGThis engine is equipped with a neutral starting device. The engine will not start unless the shift control isin neutral position.

6E0-83627-41

WARNING�Be sure shift control is in neutral before starting engine. (except 2HP)�Do not touch or remove electrical parts when starting or during operation.�Keep hands,hair,and clothes away from flywheel and other rotating parts while engine is running.

6A1-83625-41

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Stand-on Vessel

The vessel with the right-of-way has theduty to continue its course and speed,except to avoid an immediate collision.When you maintain your direction andspeed, the other vessel will be able todetermine how best to avoid you.

Give-way Vessel

The vessel which does not have the right-of-way has the duty to take positive andtimely action to stay out of the way of theStand-On vessel. Normally, you shouldnot cross in front of the vessel with theright-of-way. You should slow down orchange directions briefly and pass behindthe other vessel. You should always movein such a way that the operator of theother vessel can see what you are doing.

“The general prudential rule”

This rule is called Rule 2 in the Inter-national Rules and says,

‘In obeying and construing theserules due regard shall be had to alldangers of navigation and collision,and to any special circumstances,which may render a departure fromthe above rules necessary in order toavoid immediate danger.’

In other words, follow the standard rulesexcept when a collision will occur unlessboth vessels try to avoid each other. Ifthat is the case, both vessels become“Give-Way” vessels.

EMB40010

BASIC BOATING RULES

(Rules of the road)

Just as there are rules which apply whenyou are driving on streets and high ways,there are waterway rules which applywhen you are driving your boat. Theserules are used internationally, and arealso enforced by the United States CoastGuard and local agencies. You should beaware of these rules, and follow themwhenever you encounter another vesselon the water.

Several sets of rules prevail according togeographic location, but are all basicallythe same as the International Rules of theRoad. The rules presented here in yourOwner’s Manual are condensed, and havebeen provided for your convenience only.Consult your local U.S. Coast Guard Aux-iliary or Department of Motor Vehicles fora complete set of rules governing thewaters in which you will be using yourboat.

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.The vessel which does not have the right-of-way is called the “give-way” or “bur-dened” vessel. These rules determinewhich vessel has the right-of-way, andwhat each vessel should do.

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side. This rule doesn’t apply if both of youwill clear one another if you continue onyour set course and speed.

Crossing

When two power driven vessels arecrossing each other’s path close enoughto run the risk of collision, the vesselwhich has the other on the starboard(right) side must keep out of the way ofthe other. If the other vessel is on yourright, you must keep out of its way; youare the Give-Way vessel. If the other ves-sel is on your port (left) side, rememberthat you should maintain course anddirection, provided the other vessel givesyou the right-of-way as it should.

Overtaking

If you are passing another vessel, you arethe “Give-Way” vessel. This means thatthe other vessel is expected to maintainits course and speed. You must stay out

RULES WHEN ENCOUNTERING

VESSELS

There are three main situations which youmay encounter with other vessels whichcould lead to a collision unless the Steer-ing Rules are followed:Meeting

(you are approaching another vesselhead-on)

Crossing

(you are travelling across the othervessel’s path)

Overtaking

(you are passing or being passed byanother vessel)

In the following illustration, your boat isin the center. You should give the right-of-way to any vessels shown in white area(you are the Give-Way vessel). Any ves-sels in the shaded area must yield to you(they are the Give-Way vessels). Both youand the meeting vessel must alter courseto avoid each other.

Meeting

If you are meeting another power vesselhead on, and are close enough to run therisk of collision, neither of you has theright-of-way! Both of you should altercourse to avoid an accident. You shouldkeep the other vessel on your port (left)

102045

102046

102044

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1. When the sailing vessel is overtakingthe power-driven vessel, the power-driven vessel has the right-of-way.

2. Sailing vessels should keep clear ofany fishing vessel.

3. In a narrow channel, a sailing vesselshould not hamper the safe passageof a power-driven vessel which cannavigate only in such a channel.

Reading Buoys and Other Markers

The waters of the United states aremarked for safe navigation by the lateralsystem of buoyage. Simply put, buoysand markers have an arrangement ofshapes, colors, numbers and lights toshow which side of the buoy a boatershould pass on when navigating in a par-ticular direction. The markings on thesebuoys are oriented from the perspectiveof being entered from seaward (theboater is going towards the port). Thismeans that red buoys are passed on thestarboard (right) side when proceedingfrom open water into port, and blackbuoys are to port (left) side. When navi-gating out of port, your position withrespect to the buoys should be reversed;red buoys should be to port and blackbuoys to starboard.

Many bodies of water used by boaters areentirely within the boundaries of a partic-ular state. The Uniform State WaterwayMarking System has been devised forthese waters. This system uses buoys andsigns with distinctive shapes and colorsto show regulatory or advisory informa-tion. These markers are white with blackletters and orange boarders. They signifyspeed zones, restricted areas, dangerareas, and general information.

of its way until you are clear of it. Like-wise, if another vessel is passing you, youshould maintain your speed and directionso that the other vessel can steer itselfaround you.OTHER SPECIAL SITUATIONS

There are three other rules you should beaware of when driving your boat aroundother vessels.

Narrow Channels and Bends

When navigating in narrow channels, youshould keep to the right when it is safeand practical to do so. If the operator of apower-driven vessel is preparing to goaround a bend that may obstruct the viewof other water vessels, the operatorshould sound a prolonged blast on thewhistle (4 to 6 seconds). If another vesselis around the bend, it too should soundthe whistle. Even if no reply is heard,however, the vessel should still proceedaround the bend with caution. If you navi-gate such waters with your boat, you willneed to carry a portable air horn, avail-able from local marine supply stores.

Fishing Vessel Right-of-way

All vessels which are fishing with nets,lines or trawls are considered to be“fish-ing vessels” under the InternationalRules. Vessels with trolling lines are notconsidered fishing vessels. Fishing ves-sels have the right-of-way regardless ofposition. Fishing vessels cannot, howev-er, impede the passage of other vessels innarrow channels.

Sailing Vessel Right-of-way

Sailing vessels should normally be giventhe right-of-way. The exceptions to thisare:

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Remember, markings may vary by geo-graphic location. Always consult localboating authorities before driving yourboat in unfamiliar waters.

1 1

A

1 1

Proceeding toward headof navigation from seaward

CAN BUOY

Odd number. Leave to port.

OR

SECONDARY CHANNEL BUOYSSTARTS NEW NUMBERING SYSTEM

old new

C " 1"

NUN BUOY

Even number. Leave to starboard

N " 2"

No change

BUOYCOLOR CODE

BLACK

RED

GREEN

" A"

" 2"

" 1"

" 3"

" 4"

" 5"

" 7"

N " 2"

" 6"C " 1"

RB " L"

RG " L"or

SECONDARYCHANNEL

MAIN

CHANNEL

old new

2

2 2

A

LL

Odd number. increasing toward head of naviga-

MAIN CHANNEL BUOYS

" 1" " 3" " 5" " 7"

tion.Leave to port (left) proceeding upstream.

LIGHTED BUOY (Port Hand)`

White Light Green Light

old new

old new

old new

LIGHTED BUOY (Starboard Hand)`

" 2" " 4" " 6"

Even number,increasing toward head of naviga-tion. Leave to starboard (right) proceeding up-stream.

White Light Red Light

" A"

LIGHTED SAFE WATER BUOY

No number. Marks midchannel, pass on eitherside. Letter has no lateral significance, used for

No number . Topmost band red - prefer red

Top Mark

White LightWhite Light

OR

OR

LIGHTED PREFERRED CHANNEL TO

RB " L" RG " L"

PORT BUOY

identification and location purposes.

channel is to left of buoy. Letter has no lateralsignificance, used for identification and locationpurposes.

Red LightRed orWhite Light

OR

102052

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EMU00016

FUELING INSTRUCTIONS

wGASOLINE AND ITS VAPORS ARE HIGH-

LY FLAMMABLE AND EXPLOSIVE!

8 Do not smoke when refueling, and

keep away from sparks, flames, or

other sources of ignition.

8 Stop engine before refueling.

8 Refuel in a well-ventilated area. Refuel

portable fuel tanks off the boat.

8 Take care not to spill gasoline. If gaso-

line spills, wipe it up immediately with

dry rags.

8 Do not overfill the fuel tank.

8 Tighten the filler cap securely after

refueling.

8 If you should swallow some gasoline

inhale a lot of gasoline vapor, or get

gasoline in your eyes, get immediate

medical attention.

8 If any gasoline spills onto your skin,

immediately wash with soap and

water. Change clothing if gasoline spills

on it.

8 Touch the fuel nozzle to the filler open-

ing or funnel to help prevent electrosta-

tic sparks.

cCUse only new clean gasoline which has

been stored in clean containers and is not

contaminated with water or foreign mat-

ter.

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EMU00027

Gasohol

There are two types of gasohol: gasoholcontaining ethanol and that containingmethanol. Gasohol containing ethanolcan be used if ethanol content does notexceed 10% and the fuel meets minimumoctane ratings. Gasohol containingmethanol is not recommended by Yama-ha because it can cause fuel system dam-age or engine performance problems.

EMU00858

ENGINE OIL

If the recommended engine oil is notavailable, another 2-stroke engine oil witha NMMA-certified TC-W3 rating may beused.

Recommended oil:YAMALUBE 2 STROKE OUTBOARD OIL

Recommended gasoline:Regular unleaded gasoline with a minimum octane rating of 86 (Pump Octane Number) = (R+M)/2

EMU01804

GASOLINE

If knocking or pinging occurs, use a differ-ent brand of gasoline or premium unlead-ed fuel.

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EMU01395

PROPELLER SELECTION

The performance of your outboard motorwill be critically affected by your choice ofpropeller, as an incorrect choice couldadversely affect performance and couldalso seriously damage the motor. Enginespeed depends on the propeller size andboat load. If engine speed is too high ortoo low for good engine performance,this will have an adverse effect on theengine.

Yamaha outboard motors are fitted withpropellers chosen to perform well over arange of applications, but there may beuses where a propeller with a differentpitch would be more appropriate. For agreater operating load, a smaller-pitchpropeller is more suitable as it enablesthe correct engine speed to be main-tained. Conversely, a larger-pitch pro-peller is more suitable for a smaller oper-ating load.

Yamaha dealers stock a range of pro-pellers, and can advise you and install apropeller on your outboard that is bestsuited to your application.

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NOTE:

At full throttle and under a maximumboat load, the engine’s rpm should bewithin the upper half of the full throttleoperating range, as listed in “SPECIFICA-TIONS” on page 4-1. Select a propellerwhich fulfills this requirement.If operating under conditions which allowthe engine’s rpm to rise above the maxi-mum recommended range (such as lightboat loads), reduce the throttle setting tomaintain the rpm in the proper operatingrange.

1 Propeller diameter (in inches)2 Propeller pitch (in inches)3 Type of propeller (propeller mark)

Refer to the section “CHECKING PRO-PELLER” for instructions on propellerremoval and installation.

EMU01209

START-IN-GEAR PROTECTION

Yamaha outboard motors or Yamahaapproved remote control units areequipped with start-in-gear protectiondevice(s). This feature permits the engineto be started only when it is Neutral.Always select Neutral before starting theengine.

9-1/4x9-3/4-J

1 2 3

602021

63V-9-16-1 2/18/03 13:56 Page 18

EMC00010

Chapter 2

BASIC COMPONENTS

MAIN COMPONENTS..............................2-1

OPERATIONS OF CONTROLS AND

OTHER FUNCTIONS ................................2-2Fuel tank ................................................2-2Gear shift lever .....................................2-2Engine stop button...............................2-3Engine stop lanyard switch.................2-3Throttle control grip .............................2-4Choke knob ...........................................2-4Recoil starter handle ............................2-4Tiller handle ..........................................2-5Steering friction adjustment ...............2-6Trim angle adjusting rod .....................2-6Tilt lock mechanism .............................2-6Tilt support bar .....................................2-7Top cowling lock lever.........................2-7Carrying handle ....................................2-7

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1

2

3

4

5

6

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101022*

902063902051*

!9

!8

101232

!2

!1

!3

!5

!4

!6

u

o

y

i

!0

t

!7 q

w

e

r

EMU01206

MAIN COMPONENTS

1 Top cowling2 Cowling lock lever3 Cooling water pilot hole4 Tilt lock lever5 Recoil starter handle6 Gear shift lever7 Throttle control grip8 Throttle friction adjustment knob9 Engine stop button/

Engine stop lanyard switch0 Clamp screw

q Carrying handlew Cooling water inlete Anti-cavitation plater Trim angle adjusting rodt Clamp brackety Rope attachmentu Choke knobi Fuel tanko Fuel hose

* May not be exactly as shown; also may notbe included as standard equipment on allmodels.

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q wr

902051

e

EMC20010

OPERATIONS OF CONTROLS

AND OTHER FUNCTIONS

EMC21012

FUEL TANK

If your model was equipped with aportable fuel tank, its function is as fol-lows.

1 Fuel hose joint2 Fuel meter(If equipped)3 Fuel tank cap4 Air vent screw(If equipped)

Fuel hose joint

This connector is provided for connectingor disconnecting fuel hose.

Fuel meter

This meter is on the fuel tank cap. Itshows current fuel quantity in the fueltank approximately.

Fuel tank cap

This cap is for filling fuel. To remove it,turn it counterclockwise.

Air Vent screw

This screw is on the fuel tank cap. Toloosen it, turn it counterclockwise.

EMC25010

GEAR SHIFT LEVER

(for Tiller control model):

Turning the gear-shift lever towards youengages the clutch with the forward gearso that the boat moves ahead. Turningthe lever away from you engages thereverse gear so that the boat movesastern.

1 Neutral2 Forward3 Reverse

406041

132

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EMC27011

ENGINE STOP BUTTON (for Tiller

control model)

Pushing this button opens the ignition cir-cuit and stops the engine.

407021*

407021

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EMU00931

ENGINE STOP LANYARD SWITCH

(for Tiller control model)

The lock-plate 1 must be attached to theengine stop lanyard switch for the engineto run. The lanyard 2 should be attachedto a secure place on the operator’s cloth-ing, or arm or leg. Should the operator falloverboard or leave the helm, the lanyardwill pull out the lock plate, stopping igni-tion to the engine. This will prevent theboat from running away under power.

w8 Attach the lanyard to a secure place on

your clothing, your arm or leg while

operating.

8 Do not attach the lanyard to clothing

that could tear loose. Do not route the

lanyard in such a way that it could

become entangled, preventing it from

functioning.

8 Avoid accidentally pulling the lanyard

during normal operation. Loss of

engine power means the loss of most

steering control. Also, without engine

power, the boat could slow rapidly.

This could cause people and objects in

the boat to be thrown forward.

NOTE:

The engine cannot be started with thelock-plate removed.

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EMC40010

THROTTLE CONTROL GRIP

(for Tiller control model)

The throttle control grip is on the tillerhandle. Turn the grip counterclockwise toincrease speed and clockwise to decreasespeed.

503013

q

305071

1 2

3 4

209011

Throttle indicator

The fuel consumption curve on the throt-tle indicator shows the relative amount offuel consumed for each throttle position.Choose the setting that offers the bestperformance and fuel economy for thedesired operation.

1 Throttle indicator

EMC42310

CHOKE KNOB

Pulling out this knob supplies a rich mix-ture required to start or warm up theengine. There are 4 operating position asshown below :

EMC44010

RECOIL STARTER HANDLE

(If equipped)

Pull the handle gently until resistance isfelt. Then vigorously pull the handlestraight out to crank the engine to start it.

Position Function1 To start a hot engine2 or 3 To warm up a cold engine

or restart a warm engine4 To start a cold engine

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503015

502011

EMC60010

TILLER HANDLE

(for Tiller control model)

Moving the tiller handle sideways toadjust the steering direction.

EMC64010

Throttle Friction Adjustment

(for Tiller control model)

A friction device in the tiller handle pro-vides resistance to movement of thethrottle grip. This is adjustable for opera-tor preference. An adjusting screw/bolt islocated within the tiller handle.

To increase the resistance:Turn the adjusting screw/bolt clockwise.To decrease the resistance:Turn the adjusting screw/bolt counter-clockwise.

When constant speed is desired, tightenthe adjusting screw/bolt to maintain thedesired throttle setting.

wDo not overtighten the friction adjusting

screw/bolt. If there is too much resis-

tance, it may be difficult to move the

throttle grip, which could result in an

accident.

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408011

001742

EMD00010

STEERING FRICTION ADJUSTMENT

(for Tiller control model)

A friction device provides resistance tosteering movement. This is adjustable foroperator preference.An adjusting screw/bolt is located on theswivel bracket.

To increase the resistance:Turn the adjusting screw/bolt clockwise.

To decrease the resistance:Turn the adjusting screw/bolt counter-clockwise.

wDo not overtighten the friction

screw/bolt. If there is too much resis-

tance, it may be difficult to steer, which

could result in an accident.

EMU01297

TRIM ANGLE ADJUSTING ROD

The position of the trim angle adjustingrod determines the minimum trim angleof the outboard motor in relation to thetransom.

402014*q

EMD44110

TILT LOCK MECHANISM

(for Manual tilt model)

The tilt-lock mechanism is used to pre-vent reverse thrust from the propeller lift-ing the outboard motor when reversing.To lock it, set the tilt-lock lever in the Lockposition. To release it, place the tilt-locklever in the Tilt position.

1 Tilt-lock lever

63V-9-16-2 2/18/03 13:58 Page 7

EMD68010*

CARRYING HANDLE

The carrying handle is included betweenthe clamp bracket. The carrying handleenables you to carry the outboard motorreadily with one hand after setting it up.To set up the carrying handle, proceed asfollows.1) Place the tilt lock lever in the lock

position.2) Securely hook the arm of carrying

handle end to the clamp bracket bar.

cCPlace the tilt lock lever in the lock posi-

tion while using the carrying handle. Oth-

erwise, the lower casing may fall to the

grand while carrying the motor.

1 Clamp bracket bar

E

q

2-7

403013

EMD48010

TILT SUPPORT BAR

The tilt support bar keeps the outboardmotor in the tilted up position.

301012*

q

EMD62011

TOP COWLING LOCK LEVER

To remove the engine top cowling, turnthe lock lever. Then lift off the cowling.When replacing the cowling, check to besure it fits properly in the rubber seal.Then lock the cowling again by movingthe lever upward.

1 Top cowling lock lever

63V-9-16-2 2/18/03 13:58 Page 8

EMF00010

Chapter 3

OPERATION

INSTALLATION ........................................3-1Mounting the outboard motor............3-2Clamping the outboard motor ............3-4

FILLING FUEL AND ENGINE OIL ............3-5Filling fuel..............................................3-5Gasoline (petrol) and oil mixing .........3-6

PRE-OPERATION CHECKS ......................3-7

BREAKING IN (RUNNING IN)

ENGINE .....................................................3-8

STARTING ENGINE ...............................3-10

WARMING UP ENGINE .........................3-13

SHIFTING ................................................3-14Forward ...............................................3-14Reverse................................................3-15

STOPPING ENGINE ...............................3-16

TRIMMING OUTBOARD MOTOR.........3-17Adjusting trim angle ..........................3-18

CRUISING IN SHALLOW WATER.........3-20

TILTING UP/DOWN ...............................3-22

CRUISING IN OTHER CONDITIONS.....3-24Cruising in salt water .........................3-24Cruising in turbid water.....................3-24

E

1

2

3

4

5

6

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EMF10010

INSTALLATION

cCIncorrect engine height or obstructions to

smooth water flow (such as the design or

condition of the boat or accessories such

as transom ladders/depth finder trans-

ducers) can create airborne water spray

while the boat is cruising. Severe engine

damage may result if the motor is operat-

ed continuously in the presence of air-

borne water spray.

NOTE:

During water testing check the buoyancyof the boat, at rest, with its maximumload. Check that the static water level onthe exhaust housing is low enough to pre-vent water entry into the powerhead,when water rises due to waves when theoutboard is not running.

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EMU00176

MOUNTING THE OUTBOARD

MOTOR

wImproper mounting of the outboard

motor could result in hazardous condi-

tions such as poor handling, loss of con-

trol, or fire hazards. Observe the follow-

ing:

8 The information presented in this sec-

tion is intended as reference only. It is

not possible to provide complete

instructions for every possible

boat/motor combination. Proper

mounting depends in part on experi-

ence and the specific boat/motor com-

bination.

8 Your dealer or other person experi-

enced in proper rigging should mount

the motor. If you are mounting the

motor yourself, you should be trained

by an experienced person. [permanent

mounted type]

8 Your dealer or other person experi-

enced in proper outboard motor

mounting should show you how to

mount your motor. [portable type]

Mount the outboard motor on the centerline (keel line) of the boat, and ensure thatthe boat itself is well balanced. Otherwise,the boat will be hard to steer. For boatswithout a keel or which are asymmetrical,consult your dealer.

1 Center line (keel line)

104011q

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wOverpowering a boat may cause severe

instability. Do not install an outboard

motor with more horsepower than the

maximum rating on the capacity plate of

the boat. If the boat does not have a

capacity plate, consult the boat manufac-

turer.

104013

0~25mm

EMU01298

Mounting Height

To run your boat at optimum efficiency,the water-resistance (drag) of the boatand outboard motor must be made as lit-tle as possible. The mounting-height ofthe outboard motor greatly affects thewater-resistance. If the mounting-heightis too high, cavitation tends to occur, thusreducing the propulsion; and if the pro-peller tips cut the air, the engine speedwill rise abnormally and cause the engineto overheat. If the mounting-height is toolow, the water-resistance will increaseand thereby reduce engine efficiency.Mount the engine so that the anti-cavita-tion plate is between the bottom of theboat and a level 25 mm (1 in.) below it.NOTE:

8 The optimum mounting height of theoutboard motor is affected by theboat/motor combination and thedesired use. Test runs at differentheights can help determine the opti-mum mounting height.8 Refer to the section “TRIMMING OUT-

BOARD MOTOR” for instructions onsetting the trim angle of the outboard.

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EMF14010

CLAMPING THE OUTBOARD

MOTOR

1) Place the outboard on the transom sothat it is positioned as close to thecenter as possible. Tighten the tran-som clamp screws evenly and secure-ly. Check the clamp-screws for tight-ness occasionally during operation ofthe motor as they can work loose dueto engine vibration.

wLoose clamp screws could allow the

motor to move on the transom or fall off

the transom. This could cause loss of

control and serious injury. Make sure the

transom screws are tightened securely.

Occasionally check the screws for tight-

ness during operation.

2) An engine restraint cable or chainshould be used. Attach one end tothe engine restraint cable attachmentpoint and the other to a securemounting point on the boat. Other-wise, the engine could be completelylost if it accidentally falls off the tran-som.

409011

410012

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FILLING FUEL

AND ENGINE OILEMF30010

FILLING FUEL

1) Remove the fuel tank cap.2) Fill the fuel tank carefully.3) Close the cap securely after refueling.

Wipe up any spilled fuel.

Ring Free Fuel Additive

Gasoline is a precise blend of many differ-ent substances, each chosen to give cer-tain characteristics. Gasoline blends havebeen changing in recent years inresponse to concerns about pollution andresulting emissions regulations. One ofthe most obvious changes has been theelimination of lead from most fuels.

As gasoline has changed, the amount ofadditives such as aromatics and oxy-genates has increased. These additivesare important for the engines in passen-ger cars, but they can have detrimentaleffects in marine engines, because ofincreased deposits in the combustionchamber. When enough deposits collect,piston rings begin sticking. Performancedrops and engine wear increases dramati-cally.

While many additives available mayreduce deposits, Yamaha recommendsthe use of Ring Free Fuel Additive, avail-able from your Yamaha dealer. Ring Freehas repeatedly proven its ability to cleancombustion deposits from inside theengine, notably the critical piston-ring-land area, and fuel system components.Follow product labeling for use instruc-tions.

Fuel tank capacity:Refer to SPECIFICATIONS, Page 4-1.

902055

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EMF35010

GASOLINE (PETROL) AND OIL

MIXING

Pre-mix model

1) Pour oil and gasoline into the fueltank, in that order.

1 Oil2 Gasoline (Petrol)

2) Then mix the fuel thoroughly by shak-ing.

3) Make sure the oil is mixed with gaso-line .

cC8 Avoid using any oil other than the des-

ignated type.

8 Use a thoroughly blended fuel-oil mix-

ture.

8 If the mixture is not thoroughly blend-

ed, or if the mixing ratio is incorrect,

the following problems could occur:

Low oil ratio:

Lack of oil could cause major engine

trouble, such as piston seizure.

High oil ratio:

Too much oil could cause fouled

spark plugs, smoky exgaust, and

heavy carbon deposits.

902032

q

w

Oil : Gasoline (Petrol)

Break-in period 1 : 25

After break-in 1 : 100

Mixing ratio25 : 1

Gasoline (Petrol)

Engine oil0.04 L 0.48 L 0.56 L 0.96 L

(0.04 US qt, (0.51 US qt, (0.59 US qt, (1.01 US qt,0.04 Imp qt) 0.42 Imp qt) 0.49 Imp qt) 0.84 Imp qt)

1 L 12 L 14 L 24 L(0.26 US gal, (3.2 US gal, (3.7 US gal, (6.3 US gal,0.22 Imp gal) 2.6 Imp gal) 3.1 Imp gal) 5.3 Imp gal)

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NOTE:

If using a permanently installed tank, pourthe oil gradually as the fuel is beingadded to the tank.

Mixing ratio100 : 1

Gasoline (Petrol)

Engine oil0.01 L 0.12 L 0.14 L 0.24 L

(0.01 US qt, (0.13 US qt, (0.15 US qt, (0.25 US qt,0.01 Imp qt) 0.11 Imp qt) 0.12 Imp qt) 0.21 Imp qt)

1 L 12 L 14 L 24 L(0.26 US gal, (3.2 US gal, (3.7 US gal, (6.3 US gal,0.22 Imp gal) 2.6 Imp gal) 3.1 Imp gal) 5.3 Imp gal)

EMF40012

PRE-OPERATION CHECKS

wIf any item in the pre-operation check is

not working properly, have it inspected

and repaired before operating the out-

board motor. Otherwise, an accident

could occur.

EMF41110

Fuel

8 Check to be sure you have plenty of fuelfor your trip. 8 Make sure there are no fuel leaks or

gasoline fumes. 8 Check fuel line connections to be sure

they are tight. 8 Be sure the fuel tank is positioned on a

secure, flat surface, and that the fuelhose is not twisted or flattened, or likelyto contact sharp objects.

EMF42110

Oil

8 Check to be sure you have plenty of oilfor your trip.

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EMF43010

Controls

8 Check throttle, shift, and steering forproper operation before starting theengine.8 The controls should work smoothly,

without binding or unusual free play. 8 Look for loose or damaged connec-

tions.8 Check operation of the starter and stop

switches when the outboard motor is inthe water.

EMF43510

Engine

8 Check the engine and engine mounting. 8 Look for loose or damaged fasteners. 8 Check the propeller for damage.

cCDo not start the engine out of water.

Overheating and serious engine damage

can occur.

EMF50012

BREAKING IN (RUNNING IN)

ENGINE

Your new engine requires a period ofbreak-in (running-in) to allow mating sur-faces of moving parts to wear-in evenly.Correct break-in (running-in) will helpensure proper performance and longerengine life.

cCFailure to follow the break-in (running-in)

procedure may result in reduced engine

life or even severe engine damage.

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EMU00226

Run the engine under load (in gear with apropeller installed) as follows.1) First 10 minutes:

Run the engine at the lowest possi-ble-speed. A fast idle in neutral isbest.

2) Next 50 minutes:Do not exceed half throttle (approxi-mately 3,000 r/min). Vary enginespeed occasionally. If you have aneasy-planing boat, accelerate at fullthrottle onto plane, then immediatelyreduce the throttle to 3,000 r/min orless.

3) Second hour:Accelerate at full throttle onto plane,then reduce engine speed to three-quarter throttle (approximately 4,000r/min). Vary engine speed occasional-ly. Run at full throttle for one minute,then allow about 10 minutes of opera-tion at three-quarter throttle or less tolet the engine cool.

4) Third through tenth hours:Avoid operating at full throttle formore than 5 minutes at a time. Let theengine cool between full-throttle runs.Vary engine speed occasionally.

5) After the first 10 hours:Operate the engine normally. Use thestandard premix ratio of gasoline :Oil. (Refer to “Gasoline/Petrol and OilMixing”.)

Break-in (running-in) time:10 hours

Break-in (running-in) premix ratio:Refer to “Gasoline/Petrol and Oil Mixing”.

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EMU01147

STARTING ENGINE

w8 Before starting the engine, make sure

that the boat is tightly moored and that

you can steer clear of any obstructions.

Be sure there are no swimmers in the

water near you.

8When the air vent screw is loosened,

gasoline (petrol) vapor will be released.

Gasoline (petrol) is highly flammable,

and its vapors are flammable and

explosive. Refrain from smoking, and

keep away from open flames and

sparks while loosening the air vent

screw.

8 This product emits exhaust gases

which contain carbon monoxide, a col-

orless, odorless gas which may cause

brain damage or death when inhaled.

Symptoms include nausea, dizziness,

and drowsiness. Keep cockpit and

cabin areas well ventilated. Avoid

blocking exhaust outlets.

1) If there is an air vent screw on the fueltank cap, loosen it 2 or 3 turns.

2) If there is a fuel joint on the motor,firmly connect the fuel line to thejoint. Then firmly connect the otherend of the fuel line to the joint on thefuel tank.

NOTE:

During engine operation place the tankhorizontally, or fuel cannot be drawn intothe engine.

3) Squeeze the primer bulb with the out-let end up until you feel it becomefirm.

304013*

902061

902053

001671

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EMU01497

PROCEDURE FOR TILLER CONTROL

MODEL

4) Place the gear-shift lever in the neu-tral position.

NOTE:

The start-in-gear protection device pre-vents the engine from starting exceptwhen in Neutral.

406042

N

503016

001105

5) Attach the engine stop switch lanyardto a secure place on your clothing, oryour arm or leg. Then, install the lockplate on the other end of the lanyardin the engine stop switch.

w8 Attach the engine stop switch lanyard

to a secure place on your clothing, your

arm or leg while operating.

8 Do not attach the lanyard to clothing

that could tear loose. Do not route the

lanyard where it could become entan-

gled, preventing it from functioning.

8 Avoid accidentally pulling the lanyard

during normal operation. Loss of

engine power means the loss of most

steering control. Also, without engine

power, the boat could slow rapidly.

This could cause people and objects in

the boat to be thrown forward.

6) Place the throttle control grip in the“START” position.

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EMU00241*

Manual Start Model

7) Pull out the choke knob completelywhen the engine is cold. After theengine starts, set the choke knob tothe 2nd or 3rd position for warmingup the cold engine. After warming upthe engine, set the choke knob to theoriginal position.

NOTE:

8 It is not necessary to use the chokewhen restarting a hot engine.8 If the choke knob is left pulled out, the

engine will stall.

8) Pull the starter handle slowly untilyou feel resistance. Then, give astrong pull straight out to start theengine. Repeat it, if necessary.

9) After the engine starts, return thestarter handle slowly to the originalposition before releasing it.

305072

209011

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EMG00010-*

WARMING UP ENGINE

1) Before beginning operation, allow theengine to warm up at idling speed for3 minutes. (Failure to do this willshorten engine life.)

2) Check for a steady flow of water fromthe cooling-water pilot hole.

cCA continuous flow of water from the pilot

hole shows that the water pump is

pumping water through the cooling pas-

sages. If water is not flowing out of the

pilot hole at all times while the engine is

running, do not continue to run the

engine. Overheating and serious damage

could occur. Stop the engine and check

to see if the water inlet on the lower cas-

ing is blocked. If the problem cannot be

found and corrected, consult your Yama-

ha dealer.

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309012

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EMG20111

SHIFTING

wBefore shifting, make sure there are no

swimmers or obstacles in the water near

you.

cCTo change the shifting position from for-

ward to reverse or vice-versa, close the

throttle first so that the engine idles (or

runs at low speeds).

EMG22110

FORWARD

1) Place the throttle control grip in thefully closed position.503012

406035

NF

2) Turn the gear shift lever quickly andfirmly from Neutral to Forward.

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EMG33210

REVERSE

wWhen operating in Reverse, go slowly. Do

not open the throttle more than half. Oth-

erwise, the boat may become unstable,

which could result in loss of control and

an accident.

1) Place the throttle control grip in thefully closed position (for Tiller controlmodel).

2) Check that the tilt-lock lever (for Man-ual tilt model) is in the locked posi-tion.

503012

402014

406036

R N3) Turn the gear-shift lever quickly and

firmly from Neutral to Reverse.

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EMG38010

STOPPING ENGINE

Let it cool off for a few minutes at idle orlow speed first. Stopping the engineimmediately after operating at high speedis not recommended.EMU00275

1) Push and hold the engine stop buttonuntil the engine comes to a completestop.

2) After stopping the engine, disconnectthe fuel line from the motor.

3) Tighten the air vent screw on the fueltank cap after stopping the engine, ifit is equipped.

NOTE:

The engine can also be stopped bypulling the lanyard and removing the lockplate from the engine stop lanyard switch.

407021*

304013

902052

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EMU01412

TRIMMING OUTBOARD

MOTOR

The trim angle of the outboard motorhelps determine the position of the bowof the boat in the water. The correct trimangle will help improve performance andfuel economy while reducing strain on theengine. The correct trim angle dependsupon the combination of boat, engine,and propeller. Correct trim is also affectedby variables such as the load in the boat,sea conditions, and running speed.

wExcessive trim for the operating condi-

tions (either trim up or trim down) can

cause boat instability and can make

steering the boat more difficult. This

increases the possibility of an accident. If

the boat begins to feel unstable or is hard

to steer, slow down and/or readjust the

trim angle.

NOTE:

Refer to the section “ADJUSTING TRIMANGLE” for instructions on usage.

1 Trim operating angle

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000910

q

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EMU00951

Manual tilt model

There are 4 or 5 holes provided in theclamp bracket to adjust the outboardmotor trim angle.1) Stop the engine.2) Remove the trim angle adjusting rod

1 from the clamp bracket while tiltingthe motor up slightly.

3) Reposition the rod in the desired hole.To raise the bow (“trim-out”), move therod away from the transom.To lower the bow (“trim-in”), move therod toward the transom.Make test runs with the trim set to differ-ent angles to find the position that worksbest for your boat and operating condi-tions.

w8 Stop the engine before adjusting the

trim angle.

8 Use care to avoid being pinched when

removing or installing the rod.

8 Use caution when trying a trim position

for the first time. Increase speed gradu-

ally and watch for any signs of instabili-

ty or control problems. Improper trim

angle can cause loss of control.

NOTE:

The outboard motor trim angle can bechanged approximately 4 degrees byshifting the trim adjusting-rod one hole.

001771

q

ADJUSTING TRIM ANGLE

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EMU19160

Trim angle settings and boat handling

When the boat is on plane, a bow-up atti-tude results in less drag, greater stabilityand efficiency. This is generally when thekeel line of the boat is up about 3 to 5degrees. With the bow up, the boat mayhave a greater tendency to steer to oneside or the other. Compensate for this asyou steer. The trim tab can also be adjust-ed to help offset this effect.

1 Optimum angle (level keel line)2 Bow up3 Bow down

Bow Up

Too much trim-out puts the bow of theboat too high in the water. Performanceand economy are decreased because thehull of the boat is pushing the water andthere is more air drag. Excessive trim-outcan also cause the propeller to ventilate,which reduces performance further, andthe boat may “porpoise” (hop in thewater), which could throw the operatorand passengers overboard.

Bow Down

When the bow of the boat is down, it iseasier to accelerate from a standing startonto plane. Too much trim-in causes theboat to “plow” through the water,decreasing fuel economy and making ithard to increase speed. Operating withexcessive trim-in at higher speeds alsomakes the boat unstable. Resistance atthe bow is greatly increased, heighteningthe danger of “bow steering” and makingoperation difficult and dangerous.

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EMG70011

CRUISING IN SHALLOW

WATER

The outboard motor can be tilted up par-tially to allow operation in shallow water.

w8 Place the gear shift in the Neutral posi-

tion before using the shallow water

cruising system.

8 Run the boat at the lowest possible

speed when using the shallow water

cruising system. The tilt-lock mecha-

nism does not work while the shallow

water cruising system is being used.

Hitting an underwater obstacle could

cause the engine to lift out of the

water, resulting in loss of control.

8 Use extra care when operating in

reverse. Too much reverse thrust can

cause the engine to lift out of the

water, increasing the chance of acci-

dent and personal injury.

8 Return the engine to its normal posi-

tion as soon as the boat is back in

deeper water.

cCPlace the gear-shift in the Neutral posi-

tion before using the shallow water cruis-

ing system.

000832

NOTE:

Depending on the type of boat, the out-board motor trim angle may have littleeffect on the trim of the boat when oper-ating.

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EMG71210

PROCEDURE

1) Place the gear shift lever in the neu-tral position.

2) Pull up the tilt lock lever.

3) Slightly tilt up the engine. The tilt-support bar will lock automatically,supporting the engine in a partiallyraised position.

NOTE:

If the engine is tilted up completely, thetilt-lock lever automatically locks. Theshallow water lever is no longer effective.

4) When lowering the engine, push thetilt lock lever down. Slightly tilt up theengine until the tilt-support bar auto-matically returns to the free position.Then, slowly lower the engine to thenormal position.

406042

N

402015

403056

403012

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EMH10110

TILTING UP/DOWN

If the engine will be stopped for sometime, or if the boat is moored in shallows,the engine should be tilted up to protectthe propeller and casing from damage bycollision with obstructions, and also toreduce salt corrosion.

cC8 Before tilting the motor, follow the pro-

cedures under “STOPPING ENGINE”.

Never tilt the motor while the engine is

running. Severe damage from over-

heating can result.

8 Do not tilt up the engine by pushing

the steering handle as this could break

the handle.

8 Keep the power unit higher than the

propeller at all times. Otherwise, water

can run into the cylinder, causing dam-

age.

wBe sure all people are clear of the out-

board motor when adjusting the tilt

angle, also be careful not to pinch any

body parts between the drive unit and

engine bracket.

wLeaking fuel is a fire hazard. Disconnect

the fuel line if the engine will be tilted for

more than a few minutes. Otherwise, fuel

may leak. (If the fuel connector is provid-

ed on the motor.)

105031

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EMU00290

PROCEDURE FOR TILTING UP

1) Place the gear shift lever in Neutral.2) Remove the fuel line connection from

the motor.

3) Place the tilt lock lever in the releaseposition.

EMU00300

PROCEDURE FOR TILTING DOWN

1) Place the tilt lock lever in the lockposition.

2) Slightly tilt up the engine until the tiltsupport bar is released automatically.

3) Tilt down the engine.

402015

304013

403013

403012

4) Hold the rear of the top cowling withone hand and fully tilt the engine up.

5) The tilt support bar turns to thelocked position automatically.

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EMH60010

CRUISING IN OTHER

CONDITIONS

CRUISING IN SALT WATER

After operating in salt water, wash out thecooling-water passages with fresh waterto prevent them from becoming clogged-up with salt deposits.

NOTE:

Refer to cooling system flushing instruc-tions in “TRANSPORTING AND STORINGOUTBOARD MOTOR”.

CRUISING IN TURBID WATER

It is strongly recommended that theoptional chromium-plated water-pump kitbe installed if the outboard is to be usedin turbid (muddy) water conditions.

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-MEMO-

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EMK00010

Chapter 4

MAINTENANCE

SPECIFICATIONS .....................................4-1

TRANSPORTING AND STORING

OUTBOARD MOTOR ...............................4-3Trailering outboard motor...................4-3Storing outboard motor ......................4-4

PERIODIC MAINTENANCE......................4-7Replacement parts ...............................4-7Maintenance chart................................4-8Cleaning and adjusting spark plug.....4-9Checking top cowling ........................4-10Checking fuel system.........................4-11Inspecting fuel filter ...........................4-12Inspecting idling speed......................4-13Checking wiring and connectors ......4-14Exhaust leakage..................................4-14Water leakage .....................................4-14Greasing ..............................................4-15Checking propeller .............................4-16Changing gear oil ...............................4-18Cleaning fuel tank...............................4-19Inspecting and replacing anode(s) ...4-20Checking bolts and nuts ....................4-21Motor exterior.....................................4-21Coating the boat bottom ...................4-21

E

1

2

3

4

5

6

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EMR50302*

SPECIFICATIONS

25 (2.5, 18)17 (1.7, 12)

8Spark plug N•m (kgf•m, lb•ft)8Propeller nut N•m (kgf•m, lb•ft)

ModelUnit 9.9MSHC

Item

DIMENSIONS

PERFORMANCE

8Overall Length mm (in.)8Overall Height S mm (in.)8Overall Width mm (in.)8Transom height S mm (in.)8Weight S kg (lb.)

873 (34.4)1,040 (40.9)332 (13.1)440 (17.3)36 (79)

8Full throttle operating range r/min8Maximum output kW (HP)8Idling speed (in neutral) r/min

4,500~5,5007.3 (9.9) at 5,000 r/min.700~800

ENGINE

8Engine typeDisplacement cm3 (cu.in.)Bore × stroke mm (in.)8Ignition system8Spark plug NGK

Spark plug gap mm (in.)8Control system8Starting system8Alternator output V-A (W)8Starting carburetion system

2-stroke, L2246 (15.01)56 × 50 (2.20 × 1.97)C.D.I B7HS-100.9~1.0 (0.035~0.039)Tiller controlManual start12-(80)Choke valve start system

DRIVE UNIT

8Gear positionsGear ratio8Trim/tilt system8Propeller mark

Forward-Neutral-Reverse2.08 (27/13)ManualJ

FUEL AND OIL

TIGHTENING TORQUE

8Fuel

Fuel tank capacity L (US gal, Imp gal)8Recommended engine oil

LubricationFuel:oil ratio Fuel:Oil8Recommended gear oil

Gear oil quantity cm3 (US oz, Imp oz)

Regular unleaded gasoline(P.O.N.: minimum 86)25 (6.6, 5.5)YAMALUBE, 2 STROKE OUTBOARD OIL or an equivalent TC-W3 certified outboard oilPremix100 : 1Hypoid gear oil (SAE 90)250 (8.5, 8.8)

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15MSHC — —

873 (34.4)1,040 (40.9)332 (13.1)440 (17.3)36 (79)

4,500~5,50011.0 (15) at 5,000 r/min.700~800

2-stroke, L2246 (15.01)56 × 50 (2.20 × 1.97)C.D.I B7HS-100.9~1.0 (0.035~0.039)Tiller controlManual start12-(80)Choke valve start system

Forward-Neutral-Reverse2.08 (27/13)ManualJ

Regular unleaded gasoline(P.O.N.: minimum 86)25 (6.6, 5.5)YAMALUBE, 2 STROKE OUTBOARD OIL or an equivalent TC-W3 certified outboard oilPremix100 : 1Hypoid gear oil (SAE 90)250 (8.5, 8.8)

25 (2.5, 18)17 (1.7, 12)

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TRAILERING OUTBOARD MOTOR

The motor should be trailered and storedin the normal running position. If there isinsufficient road clearance in this position,then trailer the motor in the tilt positionusing a motor support device such as atransom saver bar.

cCDo not use the tilt support lever/knob

when trailering the boat. The outboard

motor could shake loose from the tilt

support and fall. If the motor can not be

trailered in the down position, use an

additional support device to secure it in

the up position.

w8 Never get under the lower unit while it

is tilted, even if a motor support bar is

used. Severe injury could occur if the

outboard accidentally falls.

8 USE CARE when transporting fuel tank,

whether in a boat or car.

DO NOT fill fuel container to maximum

capacity.

Gasoline will expand considerably as it

warms up and can build up pressure in

the fuel container. This can cause fuel

leakage and a potential fire hazard.

EMU01369

TRANSPORTING AND

STORING OUTBOARD MOTOR

wLeaking fuel is a fire hazard. When trans-

porting and storing the outboard motor,

close the air vent screw and fuel cock to

prevent fuel from leaking.

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EMK22010**

STORING OUTBOARD MOTOR

When storing your Yamaha outboard forprolonged periods of time, (2 months orlonger), several important proceduresmust be performed to prevent expensivedamage.It is advisable to have your outboard ser-viced by an authorized Yamaha dealerprior to storage. However, the followingprocedures can be performed by you, theowner, with a minimum of tools.

Filling Fuel Tank

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 dealeror other qualified mechanic if the fuel sys-tem is to be drained instead.

When transporting or storing the out-board motor while removed from a boat,fold the tiller handle and lean the motoron the tiller handle to keep in a horizontalposition.1 Vertical position2 Horizontal position

NOTE:

Place a towel or the like under the out-board motor to protect it from damage.

cCKeep the power unit higher than the pro-

peller at all times.

Otherwise, cooling water can run into the

cylinder, which could result in damage.

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EMU00338*

Flushing Cooling System and Fogging

Engine

Cooling system flushing is essential toprevent the cooling system from cloggingup with salt, sand, or dirt. In addition, fog-ging of the engine is mandatory to pre-vent expensive engine damage due torust. Perform the flushing and fogging atthe same time.w8 Do not tough or remove electrical parts

when starting or during operation.

8 Keep hands, hair and clothes away

from flywheel and other rotating parts

while engine is running.

EMU00994*

8 Flushing in a Water Tank

cCIf the fresh water level is below the level

of the anti-cavitation plate, or if the water

supply is insufficient, engine seizure may

occur.

a

605024

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1) Remove the engine top cowling.2) Install the outboard motor on the

water tank.3) Fill the tank with fresh water to above

the level of the anti-cavitation plate.4) Remove the cap a for fogging on the

silencer cover.5) Run the engine at a fast idle for 10~15

minutes.6) Just prior to turning off the engine,

quickly spray “Yamaha Stor-RiteEngine Fogging Oil” (Part No. LUB-STRRT-12-00) into the silencer cover.When properly done, the engine willsmoke excessively and almost stall.

7) Remove the motor from the watertank.

8) Install the cap and the top cowling.

1 Water surface 2 Lowest water level

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EMK26010

Lubrication

1) Remove the spark plugs, and spray a10 second spray of Yamaha Stor-RiteEngine Fogging Oil into each cylinder.Grease the spark plug threads andreinstall the spark plugs and torque toproper specification.(Refer to the Periodic Maintenancesection, “Cleanning and adjustingspark plug.”).

2) Turn the engine over with the stoplanyard disconnected to work the fog-ging oil into the piston rings.

3) Change the lower unit oil. (Refer tothe Periodic Maintenance section,“Changing gear oil.”). Inspect the oilfor the presence of water which indi-cates a leaky seal. Seal replacementshould be performed by an autho-rized Yamaha dealership prior to use.

4) Grease all grease fittings. (Refer tothe Periodic Maintenance section,“Greasing.”)

EMK27010

Cleaning and Anti-corrosion Measure

1) Wash down the exterior of the out-board with fresh water and dry offcompletely.

2) Spray the engine’s exterior withYamaha 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).

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EMU01569

PERIODIC MAINTENANCE

wBe sure to turn off the engine when you

perform maintenance unless otherwise

specified. If the owner is not familiar with

machine servicing, this work should be

done by a Yamaha dealer or other quali-

fied mechanic.

Maintenance, replacement, or repair of

the emission control devices and systems

may be performed by any marine engine

repair establishment or individual. All

warranty repairs, however, including

those to the emission control system,

must be performed by an authorized

Yamaha marine dealership.

A service manual is available for purchasethrough a Yamaha dealer for owners whohave the mechanical skills, tools, andother equipment necessary to performmaintenance not covered by this owner’smanual.

EMK33011

REPLACEMENT PARTS

If replacement parts are necessary, useonly genuine Yamaha parts or equiva-lents of the same type and of equivalentstrength and materials. Any part of inferi-or quality may malfunction, and theresulting loss of control could endangerthe operator and passengers.Yamaha genuine parts and accessoriesare available from a Yamaha dealer.

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EMU19450

MAINTENANCE CHART

Frequency of maintenance operations may be adjusted according to the operating con-ditions, but the following table gives general guidelines. Refer to the sections in thischapter for explanations of each owner-specific action.The mark (�) indicates the check-ups which you may carry out yourself.The mark (1) indicates work to be carried out by your Yamaha dealer.

NOTE:

When operating in salt water, turbid or muddy water, the engine should be flushedwith clean water after each use.

10 hours 50 hours 100 hours 200 hours(1 month) (3 months) (6 months) (1 year)

Spark plug(s) Cleaning / adjustment /replacement � � �

Greasing points Greasing �

Gear oil Change � �

Fuel system Inspection � � �

Fuel filter (can bedisassembled) Inspection / cleaning � � �

Fuel tank (Yamahaportable tank) Inspection / cleaning �

Idling speed (carburetormodels) Inspection / adjustment �/1 �/1

Anode(s) (external) Inspection / replacement �/1 �/1Anode(s) (internal) Inspection / replacement 1

Cooling water passages Cleaning � �

Propeller and cotter pin Inspection / replacement � �

Battery Inspection / charging �/1Throttle link / throttle cable/ throttle pick-up timing Inspection / adjustment 1

Shift link / shift cable Inspection / adjustment 1

Thermostat Inspection 1

Water pump Inspection 1

Cowling clamp Inspection �

Item ActionsInitial Every

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EMU01202

CLEANING AND ADJUSTING SPARK

PLUG

wWhen removing or installing a spark plug,

be careful not to damage the insulator. A

damaged insulator could allow external

sparks, which could lead to explosion or

fire.

The spark plug is an important enginecomponent and is easy to inspect. Thecondition of the spark plug can indicatesomething about the condition of theengine. For example, if the center elec-trode porcelain is very white, this couldindicate an intake air leak or carburetionproblem in that cylinder. Do not attemptto diagnose any problems yourself.Instead, take the outboard motor to aYamaha dealer. You should periodicallyremove and inspect the spark plugbecause heat and deposits will cause thespark plug to slowly break down anderode. If electrode erosion becomesexcessive, or if carbon and other depositsare excessive, you should replace thespark plug with another of the correcttype.

Before fitting the spark plug, measure theelectrode gap with a wire thicknessgauge; adjust the gap to specification ifnecessary.

Standard spark plug:Refer to “SPECIFICATIONS”, page 4-1.

Spark plug gap:Refer to “SPECIFICATIONS”, page 4-1.

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When fitting the plug, always clean thegasket surface and use a new gasket.Wipe off any dirt from the threads andscrew in the spark plug to the correcttorque.

NOTE:

If a torque-wrench is not available whenyou are fitting a spark plug, a good esti-mate of the correct torque is 1/4 to 1/2 aturn past finger-tight. Have the spark plugadjusted to the correct torque as soon aspossible with a torque-wrench.

1 Spark plug gap2 Spark plug I.D. mark (NGK)

Spark plug torque:Refer to “SPECIFICATIONS”, page 4-1.

903022

qwInitial of spark plug Plug wrench sizeI.D. mark

B 21 mm (13/16 in.)

C/BK 16 mm (5/8 in.)

D 18.3 mm (23/32 in.)

EMU16350

CHECKING TOP COWLING

Check the fitting of the top cowling bypushing it with both hands.If the fitting is loose have it repaired by aYamaha dealer.

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EMK38010

CHECKING FUEL SYSTEM

wGasoline (petrol) and its vapors are highly

flammable and explosive. Keep away

from sparks, cigarettes, flames or other

sources of ignition.

Check the fuel line for leaks, cracks, ormalfunctions. If any problem is found, itshould be repaired immediately by Yama-ha dealer or other qualified mechanic.

Checking points

8 Fuel system parts leakage.8 Fuel hose joint leakage.8 Fuel hose cracks or other damage.8 Fuel connector leakage.

wLeaking fuel can result in fire or explo-

sion.

8 Check for fuel leakage regularly.

8 If any fuel leakage is found, the fuel

system must be repaired by a qualified

mechanic.

Improper repairs can make the out-

board unsafe to operate.

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EMU00370

INSPECTING FUEL FILTER

wGasoline (petrol) is highly flammable, and

its vapors are flammable and explosive.

8 If you have any question about properly

doing this procedure, consult your

Yamaha dealer.

8 Do not perform this procedure on a hot

or running engine. Allow the engine to

cool.

8 There will be fuel in the fuel filter. Keep

away from sparks, cigarettes, flames or

other sources of ignition.

8 This procedure will allow some fuel to

spill. Catch fuel in a rag. Wipe up any

spilled fuel immediately.

8 The fuel filter must be reassembled

carefully with O-ring, filter cup, and

hoses in place. Improper assembly or

replacement can result in a fuel leak,

which could result in a fire or explosion

hazard.

207012

207013*

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EMU09782

1) Remove the nut holding the fuel filterassembly if equipped.

2) Unscrew the filter cup 1, catchingany spilled fuel in a rag.

3) Remove the filter element 2, andwash it in solvent. Allow it to dry.Inspect the filter element and O-ring3 to make sure they are in good con-dition. Replace them if necessary. Ifany water is found in the fuel, theYamaha portable fuel tank or otherfuel tanks should be checked andcleaned.

4) Reinstall the filter element in the cup.Make sure the O-ring is in position inthe cup. Firmly screw the cup ontothe filter housing 4.

63V-9-16-4 2/18/03 14:56 Page 13

EMU09912

INSPECTING IDLING SPEED

w8 Do not touch or remove electrical parts

when starting or during operation.

8 Keep hands, hair and clothes away

from flywheel and other rotating parts

while engine is running.

cCThis procedure must be performed while

the outboard motor is in the water. A

flushing attachment or test tank can also

be used.

A diagnostic tachometer should be usedfor this procedure. Results may varydepending on whether testing is conduct-ed with the flushing attachment, in a testtank, or with the outboard motor in thewater.1) Start the engine and allow it to warm

up fully in neutral until it is runningsmoothly. If the outboard motor ismounted on a boat, be sure the boatis tightly moored.

2) Verify whether the idle speed is set tospecification. For idle speed specifica-tions, see “Specifications” in thischapter.

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5) Attach the filter assembly to thebracket so that the fuel hoses areattached to the filter assembly.

6) Run the engine and check the filterand lines for leaks.

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EMK78010

CHECKING WIRING AND

CONNECTORS

1) Check that each grounding wire isproperly secured.

2) Check that each connector is engagedsecurely.

EXHAUST LEAKAGE

Start the engine and check that noexhaust leaks from the joints between theexhaust cover, cylinder head and crankcase.

WATER LEAKAGE

Start the engine and check that no waterleaks from the joints between the exhaustcover, cylinder head and crank case.

606011

NOTE:

Correct idling speed inspection is onlypossible if the engine is fully warmed up.If not warmed up fully, the idle speed willmeasure higher than normal. If you havedifficulty verifying the idle speed, or theidle speed requires adjustment, consult aYamaha dealer or other qualified mechan-ic.

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4-15

EMU00366

GREASING

Yamaha marine grease(Water resistant grease)

103011

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4-16

EMU00388

CHECKING PROPELLER

wYou could be seriously injured if the

engine accidentally starts while you are

near the propeller.

8 Before inspecting, removing or

installing the propeller, remove the

spark plug caps from the spark plugs.

Also, put the shift control in Neutral,

put the main switch in the “OFF” posi-

tion and remove the key, and remove

the lanyard from the engine stop

switch. Turn off the battery cut-off

switch if your boat has one.

8 Do not use your hand to hold the pro-

peller when loosening or tightening the

propeller nut. Put a wood block

between the cavitation plate and the

propeller to prevent the propeller from

turning.

210012

602051

602054

EMU00390

Propeller Checking Point

8 Check each of the propeller blades forwear, erosion from cavitation or ventila-tion, or other damage.8 Check the splines for wear and damage.8 Check for fish line winding around the

propeller shaft.8 Check the propeller shaft oil seal for

damage.

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EMU00396

Installing the Propeller

cC8 Be sure to install the thrust washer

before installing the propeller, other-

wise the lower case and propeller boss

may be damaged.

8 Be sure to use a new cotter pin and

bend the ends over securely. Otherwise

the propeller could come off during

operation and be lost.

1) Apply Yamaha Marine grease or acorrosion resistant grease to the pro-peller-shaft.

2) Install the thrust washer and propelleron the propeller-shaft.

3) Install the washer and tighten the pro-peller nut to the specified torque.

4) Align the propeller nut with the pro-peller shaft hole. Insert a new cotterpin in the hole and bend the cotter pinends.

NOTE:

When the propeller nut does not alignwith the propeller shaft hole after tighten-ing to the specified torque, then tightenthe nut further to align it with the hole.

4-17

EMU00977

Removing the Propeller

1) Straighten the cotter-pin 1 and pull itout using a pair of pliers.

2) Remove the propeller nut 2 andwasher 3.

3) Remove the propeller 4 and thrustwasher 5.

E

Tightening torque:Refer to “SPECIFICATIONS” page 4-1.

602052

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EMU01773

CHANGING GEAR OIL

w8 Be sure the outboard motor is securely

fastened to the transom or a stable

stand. You could be severely injured if

the outboard motor falls on you.

8 Never get under the lower unit while it

is tilted, even when the tilt support

lever or knob is locked. Severe injury

could occur if the outboard motor acci-

dentally falls.

1) Tilt the outboard motor so that thegear oil drain screw is at the lowestpoint possible.

2) Place a suitable container under thegear case.

001186

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3) Remove the gear oil drain screw 1.4) Remove the oil level plug 2 to allow

the oil to drain completely.

cCInspect the used oil after it has been

drained. If the oil is milky, water is get-

ting into the gear case which can cause

gear damage. Consult a Yamaha dealer

for repair of the lower unit seals.

NOTE:

For disposal of used oil consult yourYamaha dealer.

63V-9-16-4 2/18/03 14:56 Page 19

5) With the outboard motor in a verticalposition, and using a flexible or pres-surized filling device, inject the gearoil into the gear oil drain screw hole.

6) When the oil begins to flow out of theoil level plug hole, insert and tightenthe oil level plug.

7) Insert and tighten the gear oil drainscrew.

EML22010

CLEANING FUEL TANK

wGasoline (petrol) is highly flammable, and

its vapors are flammable and explosive.

8 If you have any question about properly

doing this procedure, consult your

Yamaha dealer.

8 Keep away from sparks, cigarettes,

flames or other sources of ignition

when cleaning the fuel tank.

8 Remove the fuel tank from the boat

before cleaning it. Work only outdoors

in an area with good ventilation.

8Wipe up any spilled fuel immediately.

8 Reassemble the fuel tank carefully.

Improper assembly can result in a fuel

leak, which could result in a fire or

explosion hazard.

8 Dispose of old gasoline according to

local regulations.

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601022

Gear oil grade and capacity:See “Specifications” in this chapter.

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To clean the fuel tank:

1) Empty the fuel tank into an approvedgasoline container.

2) Pour a small amount of suitable sol-vent in the tank. Reinstall the cap andshake the tank. Drain the solventcompletely.

To clean the fuel filter:

1) Remove the screws holding the fuelmeter assembly. Pull the assemblyout of the tank.

2) Clean the filter (located on the end ofthe suction pipe) in a suitable clean-ing solvent. Allow the filter to dry.

3) Replace the gasket with a new one.Reinstall the fuel meter assembly andtighten the screws firmly.

902054

EMU14622

INSPECTING AND REPLACING

ANODE(S)

Yamaha outboard motors are protectedfrom corrosion by sacrificial anodes.Inspect the external anodes periodically.Remove scales from the surfaces of theanodes. Consult a Yamaha dealer forreplacement of external anodes.

cCDo not paint anodes, as this would ren-

der them ineffective.

NOTE:

Inspect ground leads attached to externalanodes on equipped models. Consult aYamaha dealer for inspection andreplacement of internal anodes attachedto the power unit.

604011*

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EMU00409

MOTOR EXTERIOR

EMU00410

Cleaning the Outboard Motor

After use, wash the exterior of the out-board with fresh water.Flush the cooling system with freshwater.NOTE:

Refer to Flushing Cooling System instruc-tions in “TRANSPORTING AND STORINGOUTBOARD MOTOR”.

Checking Painted Surface of Motor

Check the motor for scratches, nicks, orflaking paint. Areas with damaged paintare more likely to corrode.If necessary, clean and paint the areas.Consult a Yamaha dealer for touch-uppaint.

102031

102025

EML44010

COATING THE BOAT BOTTOM

A clean hull improves boat performance.The boat bottom should be kept as cleanof marine growths as possible.If necessary, the boat bottom can be coat-ed with an anti-fouling paint approved foryour area to inhibit marine growth.Do not use anti-fouling paint whichincludes copper or graphite. These paintscan cause more rapid engine corrosion.

EML40010

CHECKING BOLTS AND NUTS

1) Check that bolts securing the cylinderhead and engine and the nut securingthe flywheel are tightened with theirspecified tightening torques.

2) Check the tightening torques of otherbolts and nuts.

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EMN00010

Chapter 5

TROUBLE RECOVERY

TROUBLESHOOTING ..............................5-1

TEMPORARY ACTION IN

EMERGENCY ............................................5-5Impact damege.....................................5-5Starter will not operate ........................5-6Treatment of submerged motor.........5-8

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1

2

3

4

5

6

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EMU01204¯

TROUBLESHOOTING

A problem in the fuel, compression, or ignition systems can cause poor starting, loss ofpower, or other problems. The troubleshooting chart describes basic checks and possi-ble remedies. (This chart covers all Yamaha outboard motors. Therefore, some itemsmay not apply to your model.)If your outboard motor requires repair, bring it to a Yamaha dealer.

Trouble Possible Cause Remedy

A. Engine will notstart (Starteroperates).

1. Fuel tank empty.2. Fuel contaminated or stale.3. Fuel filter clogged.4. Starting procedure incorrect.

5. Fuel pump malfunctions.

6. Spark plug(s) fouled or incorrecttype.

7. Spark plug cap(s) fitted incorrectly.8. Poor connections or damaged

ignition wiring.

9. Ignition parts faulty.

10. Engine stop switch lanyard notattached.

11. Engine inner parts damaged.

1. Fill tank with clean, fresh fuel.2. Fill tank with clean, fresh fuel.3. Clean or replace filter.4. Read "STARTING ENGINE"

section.5. Have serviced by a Yamaha

dealer.6. Inspect spark plug(s). Clean or

replace with recommended type.7. Check and re-fit cap(s).8. Check wires for wear or breaks.

Tighten all loose connections.Replace worn or broken wires.

9. Have serviced by a Yamahadealer.

10. Attach lanyard.

11. Have serviced by a Yamahadealer.

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5-2

B. Engine idlesirregularly or stalls.

Trouble Possible Cause Remedy

1. Spark plug(s) fouled or incorrecttype.

2. Fuel system obstructed.

3. Fuel contaminated or stale.4. Fuel filter clogged.5. Failed ignition parts.

6. Spark plug gap incorrect.7. Poor connections or damaged

ignition wiring.

8. Specified engine oil not used.9. Thermostat faulty or clogged.

10. Carburetor adjustments incorrect.

11. Fuel pump damaged.

12. Air vent screw on the fuel tankclosed.

13. Choke knob pulled out.14. Motor angle too high.

15. Carburetor clogged.

16. Fuel joint connection incorrect.17. Throttle valve adjustment incorrect.

1. Inspect spark plug(s). Clean orreplace with recommended type.

2. Check for pinched or kinked fuelline or other obstructions in fuelsystem.

3. Fill tank with clean, fresh fuel.4. Clean or replace filter.5. Have serviced by a Yamaha

dealer.6. Inspect and adjust as specified.7. Check wires for wear or breaks.

Tighten all loose connections.Replace worn or broken wires.

8. Check and replace oil as specified.9. Have serviced by a Yamaha

dealer.10. Have serviced by a Yamaha

dealer.11. Have serviced by a Yamaha

dealer.12. Open the air vent screw.

13. Return to home position.14. Return to normal operating

position.15. Have serviced by a Yamaha

dealer.16. Connect correctly.17. Have serviced by a Yamaha

dealer.

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5-3

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Trouble Possible Cause Remedy

1. Propeller damaged.

2. Propeller pitch or diameter incorrect.

3. Trim angle incorrect.

4. Motor mounted at incorrect heighton transom.

5. Boat bottom fouled with marinegrowth.

6. Spark plug(s) fouled or incorrecttype.

7. Weeds or other foreign mattertangled on gear housing.

8. Fuel system obstructed.

9. Fuel filter clogged.10. Fuel contaminated or stale.11. Spark plug gap incorrect.12. Poor connections or damaged

ignition wiring.

13. Failed ignition parts.

14. Specified engine oil not used.

15. Thermostat faulty or clogged.

16. Air vent screw closed.17. Fuel pump damaged.

18. Fuel joint connection incorrect.19. Heat range of spark plug incorrect.

1. Have propeller repaired orreplaced.

2. Install correct propeller to operateoutboard at its recommendedspeed (r/min) range.

3. Adjust trim angle to achieve mostefficient operation.

4. Have motor adjusted to propertransom height.

5. Clean boat bottom.

6. Inspect spark plug(s). Clean orreplace with recommended type.

7. Remove foreign matter and cleanlower unit.

8. Check for pinched or kinked fuelline or other obstructions in fuelsystem.

9. Clean or replace filter.10. Fill tank with clean, fresh fuel.11. Inspect and adjust as specified.12. Check wires for wear or breaks.

Tighten all loose connections.Replace worn or broken wires.

13. Have serviced by a Yamahadealer.

14. Check and replace oil withspecified type.

15. Have serviced by a Yamahadealer.

16. Open the air vent screw.17. Have serviced by a Yamaha

dealer.18. Connect correctly.19. Inspect spark plug and replace it

with recommended type.

C. Engine power loss.

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5-4

Trouble Possible Cause Remedy

D. Engine vibratesexcessively.

1. Propeller damaged.

2. Propeller shaft damaged.

3. Weeds or other foreign mattertangled on propeller.

4. Motor mounting bolt loose.5. Steering pivot loose or damaged.

1. Have propeller repaired orreplaced.

2. Have serviced by a Yamahadealer.

3. Remove and clean propeller.

4. Tighten bolt.5. Tighten or have serviced by a

Yamaha dealer.

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5-5

EMN20010

TEMPORARY ACTION IN

EMERGENCY

607011

EMU01492

IMPACT DAMAGE

wThe outboard motor can be seriously

damaged by a collision while operating

or trailering. Damage could make the out-

board motor unsafe to operate.

If the outboard motor hits any object inthe water, follow the procedure below.1) Stop the engine immediately.2) Inspect the control system and all

components for damage. Also,inspect the boat for damage.

3) Whether damage is found or not,return to the nearest harbor slowlyand carefully.

4) Have a Yamaha dealer inspect theoutboard motor before operating itagain.

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5-6

EMN30110

STARTER WILL NOT OPERATE

If the starter mechanism does not operate(engine cannot be cranked with thestarter), the engine can be started with anemergency starter rope.

w8 Use this procedure only in an emer-

gency and only to return to port for

repairs.

8When the emergency starter rope is

used to start the engine, the start-in-

gear protection device does not oper-

ate. Make sure the transmission is in

neutral. Otherwise, the boat could

unexpectedly start to move, which

could result in an accident.

8 Be sure no one is standing behind you

when pulling the starter rope. It could

whip behind you and injure someone.

8 An unguarded rotating flywheel is very

dangerous. Keep loose clothing and

other objects away when starting the

engine. Use the emergency starter rope

only as instructed. Do not touch the fly-

wheel or other moving parts when the

engine is running. Do not install the

starter mechanism or top cowling after

the engine is running.

8 Do not touch the ignition coil, high

voltage wire, spark plug cap or other

electrical components when starting of

operating the motor. You could be

shocked.

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E

5-7

208014

EMR00001

4) To start the engine with emergencystarter rope, insert the knotted end ofthe rope into the notch in the flywheelrotor and wind the rope several turnsclockwise. Then, give a strong pullstraight out to crank the engine.Repeat if necessary.

208012

407021**

301012

3) Prepare the engine for starting. See"STARTING ENGINE" for procedures.Be sure the engine is in Neutral andthat the lanyard is attached to theengine stop switch.On the electric start model the mainswitch must be on if the main switchis equipped.

2) Remove the starter/flywheel cover byremoving the bolts.

NOTE:

On a model equipped with the start-in-gear protection device (cable), disconnectthe cable from the starter.

Procedure

1) Remove the top cowling.

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5-8

E

EMN50011

TREATMENT OF SUBMERGED

MOTOR

If the outboard motor is submerged,immediately take it a Yamaha dealer. Oth-erwise, some corrosion may begin almostimmediately. If you cannot immediatelytake the outboard motor to a Yamahadealer, follow the procedure bellow fortaking care to minimize engine damage.

1) Thoroughly wash away mud, salt,seaweed, etc. with fresh water.

2) Remove the spark plugs and face thespark plug holes downward to allowany water, mud or contaminants todrain.

3) Drain the fuel from the carburetor.4) Feed fogging oil or engine oil through

the carburetors and spark plug holeswhile cranking with the manualstarter or emergency starter rope.

5) Take the outboard motor to a Yamahadealer as soon as possible.

cCDo not attempt to run the motor until it

has been completely inspected.

107012

107013

107014

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E

-MEMO-

63V-9-16-5 2/18/03 14:14 Page 10

EMP00010

Chapter 6

INDEX

INDEX ........................................................6-1

E

1

2

3

4

5

6

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6-1

E

EMP10010

INDEXA

Adjusting trim angle..............................3-18Air vent screw...........................................2-2B

Basic boating rules (Rules of the road) ..1-6Breaking in (running in) engine..............3-8C

Carrying handle........................................2-7Changing gear oil...................................4-18Checking bolts and nuts........................4-21Checking fuel system ............................4-11Checking painted surface of motor......4-21Checking propeller.................................4-16Checking top cowling ............................4-10Checking wiring and connectors..........4-14Choke knob...............................................2-4Clamping the outboard motor................3-4Cleaning and adjusting spark plug ........4-9Cleaning and Anti-corrosion Measure...4-6Cleaning fuel tank ..................................4-19Cleaning the outboard motor ...............4-21Coating the boat bottom.......................4-21Cruising in other conditions .................3-24Cruising in salt water.............................3-24Cruising in shallow water .....................3-20Cruising in turbid water ........................3-24E

Emission control information.................1-2Engine oil ................................................1-11Engine stop button ..................................2-3Engine stop lanyard switch.....................2-3Exhaust leakage .....................................4-14F

Filling fuel .................................................3-5Filling fuel and engine oil........................3-5Filling fuel tank.........................................4-4Flushing cooling system and fogging engine........................................................4-5Flushing in a water tank ..........................4-5

Forward...................................................3-14Fuel hose joint ..........................................2-2Fuel meter.................................................2-2Fuel tank....................................................2-2Fuel tank cap.............................................2-2Fueling instructions ...............................1-10G

Gasohol...................................................1-11Gasoline ..................................................1-11Gasoline (petrol) and oil mixing.............3-6Gear shift lever.........................................2-2Greasing..................................................4-15I

Identification numbers record ................1-1Impact damage ........................................5-5Important labels .......................................1-5Inspecting and replacing anode(s).......4-20Inspecting fuel filter ...............................4-12Inspecting idling speed .........................4-13Installation ................................................3-1Installing the propeller ..........................4-17L

Lubrication................................................4-6M

Main components....................................2-1Maintenance chart ...................................4-8Motor exterior ........................................4-21Mounting height ......................................3-3Mounting the outboard motor ...............3-2O

Operations of controls and other functions ...................................................2-2Outboard motor serial number ..............1-1P

Periodic maintenance..............................4-7Pre-operation checks ...............................3-7Propeller checking point .......................4-16Propeller selection .................................1-12R

Recoil starter handle................................2-4Removing the propeller ........................4-17

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6-2

E

Replacement parts...................................4-7Reverse ...................................................3-15S

Safety information...................................1-3Shifting....................................................3-14Specifications ...........................................4-1Start-in-gear protection.........................1-13Starter will not operate............................5-6Starting engine.......................................3-10Steering friction adjustment...................2-6Stopping engine.....................................3-16Storing outboard motor ..........................4-4T

Temporary action in emergency............5-5Throttle control grip.................................2-4Throttle friction adjustment ....................2-5Throttle indicator .....................................2-4Tiller handle..............................................2-5Tilt lock mechanism.................................2-6Tilt support bar.........................................2-7Tilting up/down......................................3-22Top cowling lock lever ............................2-7Trailering outboard motor ......................4-3Transporting and storing outboardmotor.........................................................4-3Treatment of submerged motor ............5-8Trim angle adjusting rod.........................2-6Trim angle settings and boat handling ..................................................3-19Trimming outboard motor....................3-17Troubleshooting.......................................5-1W

Warming up engine...............................3-13Warning labels .........................................1-5Warranty information .................Next pageWater leakage.........................................4-14

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EMU01599

IMPORTANT WARRANTY INFORMATION FOR U.S.A. AND

CANADA

Welcome to the Yamaha Family!

Congratulations on the purchase of your new Yamaha marine power. Yamaha is commit-

ted to exceptional customer satisfaction, and we want your ownership experience to be

a satisfying one. Please read the following warranty information to help ensure satisfac-

tion with your Yamaha.

Yamaha is ready to stand behind your purchase with strong warranty coverage. To be sureyou receive all the benefits of warranty, please take the following steps:

1. Be sure your new Yamaha is registered for warranty. Your boat dealer should do this atthe time of sale. Make sure your dealer gives you a copy of the completed Yamaha regis-tration card for your records. If you are unsure whether or not your Yamaha is registered,complete the Warranty Registration card found inside the cover of the Owner's Manual.Mail it to the distributor for the country in which you live (see step 6 for the correctaddress). If your Yamaha is not properly registered, a warranty repair could be unneces-sarily delayed while registration records are checked.

2. Read the Limited Warranty statement which follows these instructions. This warrantyapplies to Yamaha outboard motors sold in the United States, whether purchased sepa-rately or when supplied as original equipment by a boat builder. The terms also apply tooriginal equipment packages sold in Canada, with coverage provided by Yamaha MotorCanada (see ``Warranty Guide'' for Canadian models). This warranty explains the condi-tions of the warranty, including the obligations that your dealer and you as the ownerhave under the warranty. For example, your Yamaha outboard must receive a properpre-delivery inspection (PDI) by the selling dealer. Failure to take this important stepcould jeopardize warranty coverage!

3. If you need warranty repairs, you must take your Yamaha outboard to an authorizedYamaha outboard dealer. Be aware that not all selling boat dealers are authorized Yama-ha dealers. Only authorized dealers have the factory training, special tools, and Yamahasupport needed to perform warranty repairs.

4. If you are away from home, or your selling dealer is not an authorized Yamaha dealer,use the following toll-free numbers to find the nearest Yamaha dealer.

United States Dealer Locations: 1-800-692-6242

Canada Dealer Locations: 1-800-267-8577

63V-9-16-6 2/18/03 14:19 Page 4

5. Your warranty applies specifically to repairs made in the country of purchase. If yourU.S.-purchased Yamaha needs warranty service while in Canada, or your Canadian pur-chased Yamaha needs service while in the United States, Yamaha will assist the localdealer whenever possible. However, some products available in one country may not besold or serviced in the other.

6. If you need any additional information about your Yamaha or warranty coverage whichyour dealer cannot provide, please contact us directly.

Yamaha Motor Corporation, U.S.A.

P.O. Box 6555

Cypress, CA 90630

Attention: Customer Relations Department

Telephone No. (714) 761-7439

Fax No. (714) 761-7559

Yamaha Motor Canada Ltd.

480 Gordon Baker Road

Toronto, Ontario

M2H 3B4

Attention: Customer Relations Department

Telephone No. (416) 498-1911

Fax No. (416) 491-3122

63V-9-16-6 2/18/03 14:19 Page 5

EMU00912*

YAMAHA MOTOR CORPORATION, U.S.A.OUTBOARD MOTOR TWO YEAR LIMITED WARRANTY

Yamaha Motor Corporation, U.S.A. is proud of its heritage and reputation for producing products with high standards of quality andworkmanship. Product excellence provides the cornerstone for our commitment to customer satisfaction. The Yamaha Outboard Limit-ed Warranty is your assurance of this commitment.

This warranty provides you with protection against the expense of repairs for your outboard motor that are required as a result ofdefects in materials or workmanship. When maintained and utilized in the prescribed manner, you can count on your Yamaha outboardto provide reliable service.

This warranty provides you with specific coverage and notes your responsibilities in maintaining and operating your outboard. Pleasetake the time to read and become familiar with this warranty.

PERIOD OF WARRANTY. Any new Yamaha outboard motor purchased and registered with Yamaha Motor Corporation, U.S.A. for plea-sure use in the United States, will be warranted against defects in material or workmanship for a period of two (2) years from date ofpurchase, subject to exclusions noted herein. Any Yamaha outboard motor purchased and utilized for commercial applications will bewarranted for a period of one (1) year from the date of purchase, subject to exclusions noted herein. Yamaha peripheral equipmentincluded with the motor, such as gauges, fuel tanks and hoses, remote control boxes, propellers, and wiring external from the motorunit, will be warranted for one (1) year from the date of purchase for either pleasure or commercial use. Replacement parts used in war-ranty repairs will be warranted for the balance of the applicable warranty period.

The second year of warranty (if applicable) shall be limited to covering the cost of parts and labor for major components only. The majorcomponents covered are:

Power Unit Section

8 Power Head8 Intake Manifold and Reed Valve Assembly8 Carburetor Assembly and its Related Components8 Fuel and Oil Pump Assemblies8 Ignition System (Standard and Microcomputer)8 Precision Blend ® SystemBracket Section

8 Bracket System8 Power Trim and Tilt AssemblyLower Unit Section

8 Exhaust System8 Upper Casing8 Lower Unit Assembly

The warranty described here applies to outboard motor purchased and registered for use in the United States only excluding its territo-ries. For warranty provisions outside the United States, contact the particular country’s local Yamaha distributor.

WARRANTY REGISTRATION. To be eligible for warranty coverage, the outboard motor must first be registered with Yamaha Motor Cor-poration, U.S.A. A warranty registration form is provided in the Owner`s Manual with each outboard. This form must be completed andmailed to Yamaha by either the selling dealer or the purchaser. Warranty registration can also be accomplished by any authorizedYamaha outboard dealer. Upon receipt of the registration, an Owner`s Warranty Card will be sent by Yamaha to the registered purchas-er.

OBTAINING REPAIRS UNDER WARRANTY. To receive repairs under this warranty, a valid Owner`s Warranty Card must be presented toan authorized Yamaha outboard dealer.

During the period of warranty, any authorized Yamaha outboard dealer will, free of charge, repair or replace, at Yamaha`s option, anyparts adjudged defective by Yamaha due to faulty workmanship or material from the factory. All replaced parts will become the propertyof Yamaha Motor Corporation, U.S.A.

CUSTOMER`S RESPONSIBILITY. Under the terms of this warranty, the customer will be responsible for ensuring that the outboardmotor is properly operated, maintained and stored as specified in the applicable Owner’s Manual.

The owner of the outboard motor shall give notice to an authorized Yamaha marine dealer of any and all apparent defects within ten(10) days of discovery and make the motor available at that time for inspection and repairs at the dealer’s place of business.

GENERAL EXCLUSIONS FROM WARRANTY. This warranty will not cover the repair of damage if the damage is a result of abuse orneglect of the product. Examples of abuse and neglect include, but are not limited to:1. Racing or competition use, modification of original parts, abnormal strain.2. Lack of proper maintenance and off-season storage as described in the Owner`s Manual, improper mounting of the motor, installa-

tion of parts or accessories that are not equivalent in design and quality to genuine Yamaha parts.3. Operation of the motor at an rpm other than specified, improper propeller selection, use of lubricants, oils, and fuel/oil mixtures

that are not suitable for outboard motor use.4. Damage as a result of accidents, collisions, contact with foreign materials, or submersion.5. Growth of marine organisms on motor surfaces.6. Normal deterioration.

63V-9-16-6 2/18/03 14:19 Page 6

SPECIFIC PARTS EXCLUDED FROM WARRANTY. Parts replaced due to normal wear or routine maintenance such as oil, spark plugs,shear pins, propellers, hubs, fuel and oil filters, brushes for the starter motor and power tilt motor, water pump impellers, and anodesare not covered by warranty. Charges for removal of the motor from a boat and transporting the motor to and from an authorized Yama-ha outboard dealer are excluded from warranty coverage.

Specific parts excluded from the second year of warranty (if applicable) are:8 Top and Bottom Cowling8 Electric Components (other than ignition system)8 Rubber Components (such as hoses, tubes, rubber seals, fittings, and clamps)

TRANSFER OF WARRANTY. Transfer of the warranty from the original purchaser to any subsequent purchaser is possible by having themotor inspected by an authorized Yamaha outboard dealer and requesting the dealer to submit a change of registration to YamahaMotor Corporation, U.S.A. within ten (10) days of the transfer.

EMISSION CONTROL SYSTEM WARRANTY. Yamaha warrants to the ultimate purchaser and each subsequent purchaser, that thisengine is designed, built, and equipped so as to conform at the time of sale with applicable regulations under section 213 of the CleanAir Act and this engine is free from defects in materials and workmanship which cause said engine to fail to conform with applicableregulations for one (1) year from date of purchase.

YAMAHA MOTOR CORPORATION, U.S.A. MAKES NO OTHER WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED. ALL IMPLIED

WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WHICH EXCEED THE OBLIGATIONS AND

TIME LIMITS STATED IN THIS WARRANTY ARE HEREBY DISCLAIMED BY YAMAHA MOTOR CORPORATION, U.S.A. AND

EXCLUDED FROM THIS WARRANTY.

SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION

MAY NOT APPLY TO YOU. ALSO EXCLUDED FROM THIS WARRANTY ARE ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES

INCLUDING LOSS OF USE. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUEN-

TIAL DAMAGES, SO THE ABOVE EXCLUSION MAY NOT APPLY TO YOU.

THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE

TO STATE.

YAMAHA MOTOR CORPORATION, U.S.A.

Post Office Box 6555

Cypress, California 90630

WARRANTY QUESTIONS AND ANSWERS

Q. What costs are my responsibility during the warranty period?A. The customer`s responsibility includes all costs of normal maintenance services, non-warranty repairs, accident and collision dam-

ages.

Q. What are some examples of ``abnormal’’ strain, neglect, or abuse?A. These terms are general and overlap each other in areas. Specific examples include:

Running the machine out of oil, operating the machine with a broken or damaged part which causes another part to fail, damage orfailure due to improper or careless transportation, and/or tie down. If you have any specific questions on operation or mainte-nance, please contact your Yamaha outboard dealer for advice.

Q. Does the warranty cover incidental costs such as towing or transportation due to a failure?A. No. The warranty is limited to repair of the machine itself.

Q. May I perform any or all of the recommended maintenance shown in the Owner’s Manual instead of having the dealer do them?A. Yes, if you are a qualified mechanic and follow the procedures specified in the Owner’s and Service Manuals. We do recommend,

however, that items requiring special tools or equipment be done by a Yamaha outboard dealer.

Q. Will the warranty be void or canceled if I do not operate or maintain my new outboard exactly as specified in the Owner’s Manual?A. No. The warranty on a new outboard cannot be ’’voided`` or ’’canceled``. However, if a particular failure is caused by operation or

maintenance other than as shown in the Owner’s Manual, that failure may not be covered under warranty.

Q. What responsibility does a Yamaha outboard dealer have under this warranty?A. Each Yamaha outboard dealer is expected to:

1. Completely set up each outboard he sells prior to delivery.2. Explain the operation, maintenance, and warranty requirements to your satisfaction at the time of sale, and upon your request

at any later date.In addition, each Yamaha outboard dealer is held responsible for his setup, service and warranty repair work.

Q. Is the warranty transferable to second owners?A. Yes. The remainder of any existing warranty can be transferred upon request. The unit has to be inspected and re-registered by an

authorized Yamaha outboard dealer for the policy to remain effective.

63V-9-16-6 2/18/03 14:19 Page 7

CUSTOMER SERVICE

If your machine requires warranty service, you must take it to any authorized Yamaha outboard dealer within the continental UnitedStates. Be sure to bring your warranty registration identification or other valid proof of the original date of purchase. If a question orproblem arises regarding warranty, first contact the owner of the dealership. Since all warranty matters are handled at the dealer level,this person is in the best position to help you. If you are still not satisfied and require additional assistance, please write:

YAMAHA MOTOR CORPORATION U.S.A.CUSTOMER RELATIONS DEPARTMENT

P.O.Box 6555Cypress, California 90630

When contacting Yamaha Motor Corporation, U.S.A. don’t forget to include any important information such as names, addresses,model, engine serial number, dates, and receipts.

CHANGE OF ADDRESS

The federal government requires each manufacturer of a motor vehicle to maintain a complete, up-to-date list of all first purchasersagainst the possibility of a safety-related defect and recall. This list is complied from the purchase registrations sent to Yamaha MotorCorporation, U.S.A. by the selling dealer at the time of your purchase.

If you should move after you have purchased your new outboard, please advise us of your new address by sending a postcard listingyour outboard model name, engine serial number, dealer number (or dealer’s name) as it is shown on your warranty identification, yourname and new mailing address. Mail to:

YAMAHA MOTOR CORPORATION, U.S.A.WARRANTY DEPARTMENT

P.O.Box 6555Cypress, California 90630

This will ensure that Yamaha Motor Corporation, U.S.A. has an up-to-date registration record in accordance with federal law.

63V-9-16-6 2/18/03 14:19 Page 8

EMU01178

IMPORTANT WARRANTY INFORMATION

IF YOU USE YOUR YAMAHA OUTSIDE U.S.A. OR CANADA

Welcome to the Yamaha Family!

Congratulations on the purchase of your new Yamaha marine power. Yamaha is com-

mitted to exceptional customer satisfaction, and we want your ownership experience

to be a satisfying one. Please read the following warranty information to help ensure

satisfaction with your Yamaha.

This model was manufactured as a U.S.A. specification model, and the warranty state-ment shown in this manual is for market. To receive the benefits of the warranty thatapplies to the country in which you use your Yamaha, please note the following infor-mation.

1. The warranty on this model is the same as equivalent models sold in the countrywhere you will receive service. If you need more information about your warrantycoverage or your Yamaha outside the U.S.A. or Canada, please contact an autho-rized Yamaha dealer in your country.

2. Keep a copy of your sales contract or invoice for the purchase of your Yamaha andpresent it if you need warranty repairs. This document should show the date ofpurchase, which is important evidence the repairing dealer will need to be sureyour Yamaha is covered by warranty.

3. If your Yamaha needs warranty repairs, contact an authorized Yamaha dealer inthe country where you are. He will explain how to get warranty service in thatcountry.

4. This Yamaha model may not be sold in some countries. Therefore, in some casesyour local dealer may not have all the parts or service information he may need,which may unavoidably delay repairs. If this happens, we thank you for yourunderstanding and assure you we will attempt to resolve the situation as quickly aspossible.

63V-9-16-6 2/18/03 14:19 Page 9

Printed in JapanMarch 2003-0.5 × 1 !63V-28199-16(9.9FMH, 15FMH)(E)

Printed on recycled paper

9.9C15C

OWNER’S MANUAL

U.S.A.EditionLIT-18626-05-34

63V-9-16 Hyoshi 2/18/03 13:52 Page 1

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 2/27/02 11:47 AM Page 1

PLACEPOSTAGEHERE

ATTN: WARRANTY DEPARTMENT

Warranty card 2/27/02 11:47 AM Page 2