🔎 Honda BF75 Reference Library — Exploded parts diagrams (24 diagrams), specifications, common issues, and maintenance checklist.
The Honda BF75 is a 4-Stroke Single-Cylinder, Water-Cooled outboard motor. Suited for bay boats, pontoons, and center-console fishing boats requiring reliable mid-range power.
Quick Reference Specifications
| Specification |
Value |
| Engine Type |
4-Stroke Single-Cylinder, Water-Cooled |
| Horsepower |
75 HP |
| Displacement |
89 cc (5.4 cu in) |
| Bore x Stroke |
52 x 42 mm (2.05 x 1.65 in) |
| Spark Plug (Type & Gap) |
NGK B6HS |
| Engine Oil Capacity |
0.6 L (0.63 US qt) |
| Recommended Engine Oil |
SAE 10W-30 4-Stroke Motor Oil (API SE or higher) |
| Gear Case Oil Capacity |
130 mL (4.4 fl oz) |
| Idle Speed (in gear) |
1000 ± 100 RPM (in gear) |
| Full Throttle RPM Range |
4500-5500 RPM |
| Fuel |
Unleaded Gasoline, 86 Octane min. |
Always verify specifications against your owner's manual for your specific serial number range.
Common Issues & Recommended Parts
Below are common maintenance scenarios for the Honda BF75:
-
Water Pump / Overheating: If the tell-tale stream is weak or absent, the water pump impeller likely needs replacement. Inspect annually or every 100 hours. → Recommended: Water Pump Impeller Kit
-
Engine Oil / Maintenance Light: 4-stroke engines require regular oil and filter changes. Use marine-grade oil rated for your engine. Change every 100 hours or annually. → Recommended: Oil Filter, Engine Oil
-
Fuel Injector Issues (EFI models): Rough idle or misfires may indicate clogged fuel injectors. Use fuel stabilizer and clean injectors periodically. → Recommended: Fuel Injector, Fuel Filter
-
Gear Case Oil Leak: Check lower unit seals if gear oil appears milky (water contamination). Replace seals and gaskets during lower unit service. → Recommended: Lower Unit Seal Kit, Drain Plug Gaskets
-
Anode Corrosion: Inspect sacrificial anodes regularly, especially in saltwater. Replace when 50% depleted to protect against galvanic corrosion. → Recommended: Zinc/Aluminum Anode Kit
Parts Diagrams & OEM Part Numbers
Expand the sections below to view detailed exploded parts diagrams and find the exact OEM replacement components for your Honda BF75.
▶C.D.I. IGNITION COIL /FLYWHEEL (14 parts)
| Ref |
OEM Part # |
Part Name |
| 2 |
30500-ZV8-G01 |
COIL ASSY., C.D.I. IGNITION |
| 3 |
30540-881-732 |
COIL ASSY., EXCITER |
| 4 |
30700-881-010 |
CAP ASSY., NOISE SUPPRESSOR |
| 5 |
31100-881-000B |
FLYWHEEL *NH1* (BLACK) |
| 8 |
90016-920-000 |
BOLT, FLANGE (6X12) |
| 10 |
90124-881-000 |
BOLT, FLANGE (6X35) |
| 11 |
90201-881-000 |
NUT, SPECIAL (14MM) |
| 13 |
91404-881-000 |
CLIP, WIRE |
| 14 |
92101-06012-0A |
BOLT, HEX. (6X12) |
| 15 |
93500-06025-0A |
SCREW, PAN (6X25) |
| 16 |
93500-06050-0B |
SCREW, PAN (6X50) |
| 17 |
94001-05330-0S |
NUT, HEX. (5MM) |
| 18 |
94001-06020-0S |
NUT, HEX. (6MM) |
| 19 |
94111-05800 |
WASHER, SPRING (5MM) |
▶CAMSHAFT/VALVE (13 parts)
| Ref |
OEM Part # |
Part Name |
| 2 |
12023-921-000 |
GUIDE, VALVE |
| 4 |
14431-881-000 |
ARM, VALVE ROCKER (NOT AVAILABLE) |
| 5 |
14451-881-000 |
SHAFT, VALVE ROCKER ARM |
| 6 |
14481-881-000 |
SPRING, VALVE ROCKER ARM |
| 7 |
14482-881-000 |
COLLAR A, VALVE ROCKER ARM |
| 8 |
14483-881-000 |
COLLAR B, VALVE ROCKER ARM |
| 10 |
14721-881-000 |
VALVE, EX. |
| 11 |
14753-921-010 |
SPRING, VALVE |
| 13 |
14771-935-810 |
RETAINER, VALVE SPRING |
| 14 |
14772-881-000 |
ROTATOR, VALVE |
| 15 |
14775-921-000 |
SEAT, VALVE SPRING |
| 16 |
14781-235-000 |
COTTER, VALVE (NOT AVAILABLE) |
| 19 |
90453-235-000 |
WASHER, THRUST (16MM) |
▶CARBURETOR/AIR GUIDE (8 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
16010-881-003 |
GASKET SET |
| 2 |
16011-881-741 |
VALVE SET, FLOAT |
| 4 |
16016-881-003 |
SCREW SET A |
| 5 |
16024-881-003 |
SCREW SET, DRAIN |
| 10 |
16201-881-850 |
GASKET, CARBURETOR |
| 18 |
93892-04012-08 |
SCREW-WASHER (4X12) |
| 19 |
95001-35003-60M |
BULK HOSE, FUEL (3.5X3000) (3.5X140) |
| 20 |
99101-124-0880 |
JET, MAIN (#88) |
▶CYLINDER/CYLINDER HEAD (16 parts)
| Ref |
OEM Part # |
Part Name |
| 2 |
11210-881-850 |
GASKET, OIL PAN |
| 6 |
12391-881-000 |
GASKET, HEAD COVER |
| 8 |
37200-935-004 |
SWITCH, OIL PRESSURE |
| 9 |
37201-881-000 |
WIRE, OIL PRESSURE SWITCH |
| 10 |
37202-935-004 |
WASHER (4MM) |
| 11 |
90017-935-000 |
BOLT, HEAD (8X70) |
| 12 |
90018-935-000 |
BOLT, HEAD (8X94) |
| 13 |
90019-881-000 |
BOLT, HEX. (8X55) |
| 16 |
90124-881-000 |
BOLT, FLANGE (6X35) |
| 17 |
90126-881-000 |
BOLT, FLANGE (8X45) |
| 18 |
90402-822-000 |
WASHER, HEAD (8MM) |
| 20 |
91206-921-000 |
OIL SEAL (16X28X6) |
| 21 |
15142-PH3-003 |
O-RING (10.8X2.4) (ARAI) |
| 24 |
93500-04006-3J |
SCREW, PAN (4X6) |
| 25 |
94301-10160 |
PIN, DOWEL (10X16) |
| 26 |
98066-55716 |
SPARK PLUG (DR-5HS) (NGK) |
▶EXTENSION CASE/GEAR CASE /SHIFT ROD (16 parts)
| Ref |
OEM Part # |
Part Name |
| 3 |
24312-881-000 |
JOINT, GEARSHIFT ROD |
| 5 |
24341-ZV4-300 |
ROD, PUSH |
| 9 |
41103-935-003 |
BEARING, NEEDLE (15X21X16) |
| 12 |
41106-935-812 |
METAL, ANODE |
| 19 |
90504-921-010 |
WASHER, PLAIN (6MM) |
| 21 |
90518-921-000 |
WASHER, PLAIN (8MM) |
| 23 |
90855-921-300 |
PLUG, SEALING (10MM) |
| 24 |
91253-921-003 |
SEAL, WATER (6MM) |
| 25 |
91303-377-000 |
O-RING (13.8X2.5) |
| 26 |
92101-06012-4J |
BOLT, HEX. (6X12) |
| 27 |
92101-06016-0B |
BOLT, HEX. (6X16) |
| 30 |
92101-08050-4J |
BOLT, HEX. (8X50) |
| 31 |
94101-06200 |
WASHER, PLAIN (6MM) |
| 32 |
94301-10140 |
PIN A, DOWEL (10X14) |
| 33 |
94305-25122 |
PIN, SPRING (2.5X12) |
| 34 |
96220-25118 |
ROLLER (2.5X11.8) |
▶FUEL PUMP (10 parts)
| Ref |
OEM Part # |
Part Name |
| 2 |
16016-935-004 |
BOLT SET, HOLDING |
| 5 |
16182-935-014 |
ROD, PUSH |
| 6 |
16194-935-004 |
SCREEN, FUEL STRAINER |
| 8 |
16700-935-024 |
PUMP ASSY., FUEL (MSDS) |
| 11 |
90602-921-000 |
CLIP, TUBE (B8) |
| 13 |
91403-881-000 |
CLIP B, CORD |
| 14 |
93500-06020-0H |
SCREW, PAN (6X20) |
| 15 |
93892-04016-08 |
SCREW-WASHER (4X16) |
| 16 |
95001-45003-60M |
BULK HOSE, FUEL (4.5X3000) (4.5X400) |
| 17 |
95001-45003-60M |
BULK HOSE, FUEL (4.5X3000) (4.5X400) |
▶FUEL TANK/SUB TANK (11 parts)
| Ref |
OEM Part # |
Part Name |
| 2 |
061C7-881-711H |
TANK KIT, FUEL *R8* (BRIGHT RED) |
| 4 |
16900-881-000 |
JOINT A, FUEL |
| 18 |
17650-921-003ZB |
CONNECTOR, FUEL *NH1* (BLACK) |
| 19 |
17661-921-010 |
BULB, PRIMER |
| 21 |
17680-921-000 |
VALVE, OUTLET |
| 29 |
17703-921-010 |
BAND, TUBE CLIP (20MM) |
| 33 |
87571-881-671 |
MARK, TANK CAUTION (ENGLISH/FRENCH) |
| 35 |
87574-881-670 |
MARK, TANK (FRENCH) |
| 37 |
91353-921-310 |
O-RING (5.5MM) |
| 38 |
92101-06012-4J |
BOLT, HEX. (6X12) |
| 39 |
92101-06016-0B |
BOLT, HEX. (6X16) |
▶HANDLEBAR/THROTTLE CABLE (5 parts)
| Ref |
OEM Part # |
Part Name |
| 6 |
17936-921-000 |
WASHER, PIVOT |
| 8 |
24621-921-010 |
BUSH, SHAFT |
| 30 |
90107-881-000 |
BOLT, SLOTTED (4X6) |
| 34 |
92101-06012-0B |
BOLT, HEX. (6X12) |
| 35 |
92101-06012-4J |
BOLT, HEX. (6X12) |
▶INLET MANIFOLD/C.D.I. UNIT (9 parts)
| Ref |
OEM Part # |
Part Name |
| 2 |
12516-881-003 |
GASKET, EX. CHAMBER |
| 3 |
12517-881-003 |
GASKET, EX. CHAMBER |
| 5 |
17100-881-740ZA |
MANIFOLD, IN. *NH8* (DARK GRAY) |
| 7 |
19300-881-741 |
THERMOSTAT ASSY. |
| 8 |
19302-921-003 |
RUBBER, THERMOSTAT |
| 12 |
90016-920-000 |
BOLT, FLANGE (6X12) |
| 15 |
90602-921-000 |
CLIP, TUBE (B8) |
| 16 |
90604-ZV0-000 |
CLIP, TUBE (B12) |
| 19 |
94001-06020-0S |
NUT, HEX. (6MM) |
▶MOUNT FRAME/UPPER MOUNT RUBBER (8 parts)
| Ref |
OEM Part # |
Part Name |
| 3 |
50112-921-300 |
SPRING, HANDLE |
| 4 |
50130-881-000 |
RUBBER, MOUNTING (UPPER) |
| 8 |
90513-921-000 |
WASHER (10MM) |
| 9 |
90514-921-000 |
WASHER (8MM) |
| 10 |
90518-921-000 |
WASHER, PLAIN (8MM) |
| 11 |
92101-06014-4J |
BOLT, HEX. (6X14) |
| 13 |
94002-08490-0S |
NUT, HEX. (8MM) |
| 14 |
94305-60503 |
PIN, SPRING (6X50) |
▶OIL CASE/ENGINE COVER (11 parts)
| Ref |
OEM Part # |
Part Name |
| 2 |
17918-881-000 |
GROMMET C, OIL CASE |
| 4 |
18222-881-000 |
BAND, EX. SEAL |
| 25 |
90016-920-000 |
BOLT, FLANGE (6X12) |
| 28 |
90504-921-010 |
WASHER, PLAIN (6MM) |
| 30 |
90512-921-010 |
WASHER (6MM) |
| 33 |
91305-PE2-003 |
O-RING (9.8X1.9) |
| 34 |
92101-06012-4J |
BOLT, HEX. (6X12) |
| 35 |
92101-06016-4J |
BOLT, HEX. (6X16) |
| 38 |
93500-04010-0G |
SCREW, PAN (4X10) |
| 39 |
94001-04390-0S |
NUT, HEX. (4MM) (NOT AVAILABLE) |
| 40 |
94301-08140 |
PIN, DOWEL (8X14) |
▶OIL PUMP/OIL FILTER /EXHAUST PIPE (12 parts)
| Ref |
OEM Part # |
Part Name |
| 3 |
15410-881-000 |
FLANGE, OIL FILTER |
| 9 |
15473-881-000 |
VALVE, CHECK |
| 10 |
15474-881-000 |
SPRING, CHECK VALVE |
| 11 |
15611-921-000 |
CAP, OIL (YELLOW) |
| 18 |
90120-881-000 |
BOLT, FLANGE (6X16) |
| 20 |
90478-700-000 |
WASHER A (6MM) |
| 21 |
91306-PJ4-000 |
O-RING (6.8X1.9) |
| 22 |
91301-805-000 |
O-RING (26X2.7) |
| 24 |
92201-06028-0B |
BOLT, HEX. (6X28) |
| 25 |
93500-05010-0A |
SCREW, PAN (5X10) |
| 26 |
94101-05000 |
WASHER, PLAIN (5MM) |
| 27 |
95002-01120 |
CLIP, TUBE (A12) |
▶PISTON/CRANKSHAFT (7 parts)
| Ref |
OEM Part # |
Part Name |
| 3 |
13111-881-000 |
PIN, PISTON |
| 7 |
90011-881-000 |
BOLT, CONNECTING ROD |
| 8 |
90402-921-000 |
WASHER (6MM) |
| 10 |
91201-881-003 |
OIL SEAL A (30X42X7) |
| 11 |
91202-881-003 |
OIL SEAL B (30X42X7) |
| 12 |
94401-16150 |
KEY, WOODRUFF (16X15) |
| 13 |
94601-14000 |
CLIP, PISTON PIN (14MM) |
▶PROPELLER SHAFT/PROPELLER (0 parts)
▶RECOIL STARTER (8 parts)
| Ref |
OEM Part # |
Part Name |
| 5 |
28443-935-000 |
PLATE, FRICTION |
| 7 |
28445-935-000 |
WASHER |
| 9 |
28451-921-000 |
SPRING, RECOIL STARTER |
| 11 |
28454-921-000 |
GUIDE, ROPE |
| 12 |
28455-881-006 |
PLATE, SEAL |
| 19 |
90016-920-000 |
BOLT, FLANGE (6X12) |
| 20 |
92101-06025-0B |
BOLT, HEX. (6X25) |
| 21 |
94111-06000 |
WASHER, SPRING (6MM) |
▶REMOTE CONTROL BRACKET (6 parts)
| Ref |
OEM Part # |
Part Name |
| 3 |
17941-881-811 |
STOPPER, THROTTLE ARM |
| 4 |
24701-881-812 |
LEVER, GEARSHIFT |
| 5 |
90504-921-010 |
WASHER, PLAIN (6MM) |
| 6 |
92101-05010-4J |
BOLT, HEX. (5X10) |
| 7 |
92101-06012-4J |
BOLT, HEX. (6X12) |
| 8 |
94251-06000 |
PIN, LOCK (6MM) |
▶SAFETY SWITCH/VERTICAL STARTER (10 parts)
| Ref |
OEM Part # |
Part Name |
| 6 |
28481-881-810 |
IDLER, VERTICAL STARTER |
| 7 |
28482-881-810 |
GUIDE, ROPE |
| 8 |
28483-881-810 |
BRACKET, VERTICAL STARTER |
| 15 |
90407-920-000 |
WASHER, SPRING (6MM) |
| 16 |
90504-921-010 |
WASHER, PLAIN (6MM) |
| 17 |
90513-921-000 |
WASHER (10MM) |
| 18 |
91402-881-000 |
PIN, LOCK (10MM) |
| 19 |
92101-06012-4J |
BOLT, HEX. (6X12) |
| 20 |
93500-06012-4J |
SCREW, PAN (6X12) |
| 21 |
94001-06490-0S |
NUT, HEX. (6MM) |
▶SHIFT SHAFT/CARRYING HANDLE/COVER LOCK LEVER (23 parts)
| Ref |
OEM Part # |
Part Name |
| 3 |
17951-921-030 |
KNOB, CHOKE |
| 6 |
24610-881-010 |
SHAFT, SHIFT |
| 8 |
24621-921-010 |
BUSH, SHAFT |
| 19 |
37210-ZV4-003 |
LAMP ASSY., INDICATOR |
| 21 |
63201-935-000ZB |
LEVER, COVER LOCK *B9* (ATLANTIS BLUE) (NOT AVAILABLE) |
| 24 |
63205-920-000 |
BUSH, COVER LOCK |
| 26 |
90124-881-000 |
BOLT, FLANGE (6X35) |
| 27 |
90302-921-000 |
NUT, HEX. (16MM) |
| 28 |
90455-881-000 |
SPRING, LEVER |
| 29 |
90504-921-010 |
WASHER, PLAIN (6MM) |
| 30 |
90511-921-000 |
WASHER, PLAIN (10MM) |
| 31 |
90512-921-010 |
WASHER (6MM) |
| 32 |
90518-921-000 |
WASHER, PLAIN (8MM) |
| 33 |
90754-921-010 |
PIN (5X17) |
| 34 |
90756-921-000 |
PIN, SPLIT (1.6MM) |
| 35 |
91403-881-000 |
CLIP B, CORD |
| 37 |
92101-06012-0B |
BOLT, HEX. (6X12) |
| 38 |
92101-06016-0B |
BOLT, HEX. (6X16) |
| 39 |
92101-06020-4J |
BOLT, HEX. (6X20) |
| 40 |
92101-06025-4J |
BOLT, HEX. (6X25) |
| 45 |
93500-05022-0B |
SCREW, PAN (5X22) |
| 47 |
94101-05200 |
WASHER, PLAIN (5MM) |
| 49 |
98200-10500 |
FUSE A (5A) |
▶STARTER CASE/CAM PULLEY /PULSER COIL (13 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
11301-881-020ZA |
CASE, STARTER *NH8* (DARK GRAY) |
| 5 |
14312-881-000 |
FLANGE, TIMING PULLEY |
| 7 |
14400-921-024 |
BELT, TIMING |
| 13 |
87581-921-600 |
MARK, POINT |
| 14 |
90016-920-000 |
BOLT, FLANGE (6X12) |
| 17 |
90202-881-000 |
NUT, LOCK (24MM) |
| 20 |
90604-ZV0-000 |
CLIP, TUBE (B12) |
| 23 |
90705-882-600 |
PIN, DOWEL (7X4.5) |
| 27 |
91311-881-003 |
O-RING (62X2.5) |
| 28 |
92101-06022-0B |
BOLT, HEX. (6X22) |
| 29 |
93500-05014-0B |
SCREW, PAN (5X14) |
| 30 |
94101-05200 |
WASHER, PLAIN (5MM) |
| 31 |
94111-05800 |
WASHER, SPRING (5MM) |
▶STERN BRACKET/ADJUST ROD (14 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
50122-935-010 |
PLATE, PUSH |
| 9 |
50341-921-300 |
ROD, ADJUSTING (NOT AVAILABLE) |
| 11 |
50343-921-300 |
SPRING, ADJUSTING ROD |
| 12 |
58131-881-000 |
PIN, SHEAR |
| 14 |
90106-921-010 |
BOLT, TILTING |
| 16 |
90407-920-000 |
WASHER, SPRING (6MM) |
| 17 |
90504-921-010 |
WASHER, PLAIN (6MM) |
| 18 |
90511-921-000 |
WASHER, PLAIN (10MM) |
| 19 |
90513-921-000 |
WASHER (10MM) |
| 20 |
90514-921-000 |
WASHER (8MM) |
| 21 |
90757-921-000 |
PIN, SPLIT (3MM) |
| 23 |
94001-06490-0S |
NUT, HEX. (6MM) |
| 24 |
94305-20083 |
PIN, SPRING (2X8) |
| 25 |
94305-40143 |
PIN, SPRING (4X14) |
▶SWIVEL CASE/SWIVEL SHAFT /TILT LEVER (10 parts)
| Ref |
OEM Part # |
Part Name |
| 3 |
50212-881-000 |
BLOCK, FRICTION |
| 5 |
50233-881-000 |
SPRING, FRICTION ADJUSTING |
| 12 |
50514-881-310 |
SPRING, REVERSE LOCK |
| 19 |
51427-230-300 |
WASHER (6X11) |
| 22 |
90454-881-000 |
WASHER, THRUST |
| 23 |
90504-921-010 |
WASHER, PLAIN (6MM) |
| 24 |
90511-921-000 |
WASHER, PLAIN (10MM) |
| 28 |
91402-881-000 |
PIN, LOCK (10MM) |
| 29 |
92101-06016-4J |
BOLT, HEX. (6X16) |
| 31 |
94305-40253 |
PIN, SPRING (4X25) |
▶TOOLS/STARTER ROPE (10 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
28470-816-000 |
ROPE, STARTER |
| 4 |
89301-921-010 |
SCREWDRIVER, CHECK BOLT |
| 5 |
98066-55716 |
SPARK PLUG (DR-5HS) (NGK) |
| 6 |
99001-09120 |
SPANNER (9X12) |
| 7 |
99001-10120 |
SPANNER (10X12) |
| 8 |
89210-GBJ-J10 |
PLIERS (135) (KOWA) |
| 9 |
99003-10000 |
DRIVER 1, PLUS SCREW (NO.2) |
| 10 |
99003-30000 |
DRIVER 3, MINUS SCREW (NO.2) |
| 11 |
99003-40000 |
LEVER |
| 12 |
99004-18190 |
WRENCH, BOX (P18X19) |
▶WATER MOUTH/BODY COVER /GEAR OIL (3 parts)
| Ref |
OEM Part # |
Part Name |
| 3 |
19262-921-810 |
MOUTH, WATER |
| 7 |
41106-935-812 |
METAL, ANODE |
| 9 |
92101-06016-0B |
BOLT, HEX. (6X16) |
▶WATER PUMP/VERTICAL SHAFT (11 parts)
| Ref |
OEM Part # |
Part Name |
| 2 |
19220-881-305 |
HOUSING, IMPELLER |
| 3 |
19231-881-840 |
COVER, IMPELLER |
| 4 |
19232-881-306 |
GASKET, IMPELLER |
| 7 |
19252-921-020 |
RING, SEAL |
| 12 |
41136-935-003 |
WASHER B, THRUST BEARING (2.05MM) |
| 13 |
90108-881-000 |
BOLT, HEX. (6X28) |
| 15 |
90112-881-000 |
COLLAR B, DISTANCE |
| 16 |
90504-921-010 |
WASHER, PLAIN (6MM) |
| 17 |
91252-935-004 |
SEAL, WATER (15MM) (NOK) |
| 18 |
92101-06012-4J |
BOLT, HEX. (6X12) |
| 19 |
96100-63020-00 |
BEARING, RADIAL BALL (6302) |
100-Hour / Annual Service Checklist
Regular maintenance keeps your Honda BF75 running reliably season after season. Most of these tasks can be performed with basic tools and the factory service manual.
- Replace water pump impeller and inspect wear plate
- Change engine oil and oil filter (check drain plug washer)
- Replace spark plugs and check ignition timing
- Drain and refill lower unit gear oil; inspect for water contamination
- Inspect fuel lines, primer bulb, and fuel filter for deterioration
- Check and replace sacrificial anodes (zinc or aluminum)
- Inspect propeller for damage; check shaft seal and cotter pin
- Check valve clearance (refer to service manual for specifications)
- Lubricate all grease points (steering, tilt tube, shift linkage)
- Inspect control cables and throttle/shift linkage for smooth operation
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Pro Tip: Always flush the engine with fresh water after saltwater use — even a quick 10-minute flush significantly extends component life.
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Pro Tip: Use fuel stabilizer in the tank before winter storage, and fog the cylinders to prevent internal corrosion during extended periods of non-use.
