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Paper book Part no. 6688122
PREFACE This manual covers service procedures for the HONDA BF75and SF1 00 Ouboard Motors, serial numbers 1000004 and subsequent.
ALL INFORMATION, ILLUSTRATIONS, DIRECTIONS AND SPECIFICATIONS INCLUDED IN THIS PUBLICATION ARE BASED ON THE LATEST PRODUCT INFORMATION AVAILABLE AT THE TIME OF AP-
'I PROVAL FOR PRINTING. HONDA MOTOR CO., LTD. RESERVES THE RIGHT TO MAKE CHANGES WITHOUT
: INCURRING ANY OBLIGATION WHATEVER. NO PART OF THIS PUBLICATION MAY BE REPRODUCED WITHOUT WRITTEN PERMISSION.
HONDA MOTOR CO., L TO. SERVICE PUBLICATIONS OFFICE
1
SPECIFICATIONS
SERVICE INFORMATION
MAINTENANCE
HONDA BF75/BF100
DISASSEMBL Y AND SERVICE
CONSTRUCTION AND FUNCTION
SUPPLEMENT BF 75' BF 100
SUPPLEMENT BF 8A
SHOP MANUAL NEWS
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CONTENTS I. SPECiFiCATIONS . .. . .. .. ................ 3
1. SPECiFiCATIONS..... .. ............. 3 2. DIMENSIONAL DRAWINGS . . . . . . . . . . .. 4
II. SERVICE INFORMATION .. . . ............ 5 1. GENERAL SAFETY .. ..... ......... .. . 5 Z. SERVICE RULES . . . . . . . . . .. . . .. . . . . . . 6 3. SERIAL NUMBER LOCATION .... . .. . .. 6 4. MAINTENANCE STANDARDS . .. .. .. .. . 7 5. TORQUE VALUES . . .. . . ............. 8 6. SPECIAL TOOLS ......... . . . . . . . . . . . . 9 7. WIRING DIAGRAM . . . . . . ............. 11 8. TUBING LAYOUT ....•............... 16 9. TROUBLESHOOTING .. .. ............. 17
10. MAINTENANCE SCHEDULE ........... 20 11. RECOMMENDED SERVICE MATERIALS. 21 12. ALTERNATE PROPELLERS . . .......... 22 13. LUBRICATION CHART . .. ............. 23
III . MAINTENANCE ..... .... ................ 24
2
1. ENGINE OIL CHANGE . ...... . .. . . . . . . 24 2. GEAR 01 L CHANGE . . . .. ............ . 24 3. SPARK PLUG CLEANING/
ADJUSTMENT . . .. . .. . ............... 25 4. IGNITION TIMING ADJUSTMENT ....... 25 5. VALVE CLEARANCE ADJUSTMENT .... 26 6. CARBURETOR ADJUSTMENT . ........ , 27 7. SHIFT ROO ADJUSTMENT ... '" ....... 27 8. THROTTLE CABLE ADJUSTMENT ...... 28 9. THROTTLE GRIP FRICTION
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . .. 28 10. STEERING HANDLEBAR FRICTION
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . 28 11. CYLINDER COMPRESSION CHECK ..... . '29 12. SPARK TEST ........ • ............ . .. '29
HONDA BF75/BFIOO
IV. DISASSEMBLY AND SERVICE ............. '30 1. DISASSEMBLY CHART ................ '30 2. RECOIL STARTER .. ... .. ............ 31 3. CARBURETOR/FUEL PUMP ......... .. . '34 4. ELECTRiCAL . ... .. .................. 38 5. ENGINE/LOWER UNIT· REMOVAL .... 53 6. CYLINDER HEAD REMOVAL . ... . .. .. 57 7. CAM SHAFT/VALVE/OIL PUMP . .. .... 58 8. CRANKSHAFT/PISTON ... . .. . .. . ... . 66 9. HANDLEBAR/SHIFT LEVER. ..... .. . . 72
10. SWIVEL CASE/STERN BRACKET ...... 76 11. PROPELLER/GEAR CASE .. . ......... 79 12. OPTIONAL PARTS .................. 87
V. CONSTRUCTION AND FUNCTION. . . . . . . .. 93 1. LUBRICATION SySTEM..... . ...... .. 93 2. COOLING SYSTEM .. . ............. .. 94 3. FUEL SYSTEM .......... .. .......... : 95 4. POWER TRANSMITTING SySTEM.. .. .. 97 5. ELECTRICAL SYSTEM . . . . . . . . . . . . . . . 98 6. TILT AND REVERSE LOCK
MECHANISM . . ... .... ............. . 102 VI. SUPPLEMENT ........ ... ... .... ... .. ....... . ...... ........ 104 VII . SUPPLEMENT... .......................................... 113
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I. SPECIFICATIONS HONDA. BF75/BF I 00
1. SPECIFICATIONS
1. SPECIFICATIONS
Dimensions· Weight
Overall length
Overall width
Overall height
Dry weight
Operating weight lincld. oil)
Transom height
Transom angle
Tilting
Swivel angle
Engine
Type
Total piston displacement
80" x stroke
MlIXimum horaapowar
Maximum torque
cッューイセゥッョ@ ratio
Fuel consumption ratio
Cooling system
Ignition sys1em
Ignition timing
Spark plug
Carburetor
Advance type
Lubrieation system
Lubricant capacity
Starting system
Stopping system
Fuel
Fuel tank capacity
Fuel pump
Exhaust system
Lower Unit
Clutch
a .. r ratio
Ge., ea .. oil capacity
Prop.lI.r
2. DIMENSIONAL DRAWINGS
SF 75 Short
515 mm 120.3 in)
315 mm 112.4 in)
1.010 mm 139.8 in)
34 kg 175.0 Ib)
35 kg (77.2 Ib)
422 mm 116.6 in)
SF 75 long
1.160 mm 145.7 in)
35 kg (77 2.lb)
36 kg 179.4 Ib)
572 mm (22.5 in)
4-stage (3° - 8° - '13 0 - 18° )
2-stage (32.5° - 72°)
R: 45°, L: 46°
2 cylinder, in-line. 4 stroke. water-cooled, OHC
197 cc 112.0 cu in)
56 X 40 mm 12.20 x 1.57 i,,)
7.5 ps (7.4 hp)/5.2oo rpm
110 kg-cm 17.96 ft-lb)
8.6: 1
270 g/ps·h (0.60 Ib/hp·h)
SF 100 Short
1,010 mm (39.8 in)
34 kg (75.0 Ib)
35 kg 177.2 Ib)
422 mm 116.6 in)
9.9 ps (9.8 hp)/5.700 rpm
130 kg-cm (9.40 ft-Ib)
Forced wat.r circulation by impeller pump with thermostat
Engine serial number 1000004-1199999: Flywheel magneto
Engine serial number 1200001 and subsequent: COl
15° - 35° B.T.D.C.
DR-SHS INGK) (Standard)
Horizontal type, butterfly valves
Centrifugal spark advance
Pressure lubrication by trochoid pump
0.82 10.815 US qt. 0.70 Imp qt) ISAE lOW-40 Service Classifieation SE or SF)
Recoil starter
Grounding of primary circuit
Regular automotive gasoline
132 13A US gal. 2 .9 Imp gal)
Diaphragm type
In-water type
Dog clutch (Forward - Neutral - Reverse)
12 : 29
0.23Q 10.49 US ptl
No. of blades-Dia. x Pitch 3 - 240 mm x 220 mm 13 - 9 ·1/2 x 8-3/4 in)
Rotating direction Clockwise ( viewad from rear)
3
BF 100 Long
1,160 mm (45.7 in)
35 kg (77 2. Ib)
36 kg (79.4 Ib)
572 mm (22.5 in)
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