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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