🔎 Honda BF20 Reference Library — Exploded parts diagrams (33 diagrams), specifications, common issues, and maintenance checklist.
The Honda BF20 is a 4-Stroke OHC 2-Cylinder, Water-Cooled outboard motor. A popular choice for small fishing boats, inflatable RIBs, and sailboat auxiliaries.
Quick Reference Specifications
| Specification |
Value |
| Engine Type |
4-Stroke OHC 2-Cylinder, Water-Cooled |
| Horsepower |
20 HP |
| Displacement |
351 cc (21.4 cu in) |
| Bore x Stroke |
72 x 43 mm (2.83 x 1.69 in) |
| Spark Plug (Type & Gap) |
NGK DCPR6E |
| Engine Oil Capacity |
1.1 L (1.16 US qt) |
| Recommended Engine Oil |
SAE 10W-30 4-Stroke Marine Oil (API SG or higher) |
| Gear Case Oil Capacity |
160 mL (5.4 fl oz) |
| Idle Speed (in gear) |
900 ± 50 RPM (in gear) |
| Full Throttle RPM Range |
5000-6000 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 BF20:
-
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 BF20.
▶CAMSHAFT/VALVE (10 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
12209-GB4-682 |
SEAL, VALVE STEM (ARAI) |
| 3 |
14431-ZW9-000 |
ARM, VALVE ROCKER |
| 4 |
14436-ZW9-003 |
ARM, FUEL PUMP ROCKER |
| 5 |
14461-ZW9-000 |
SHAFT, ROCKER ARM |
| 6 |
14481-ZW9-000 |
SPRING, ROCKER ARM |
| 7 |
14711-ZY1-000 |
VALVE, IN. |
| 8 |
14721-ZY1-000 |
VALVE, EX. |
| 9 |
14751-ZY1-000 |
SPRING, VALVE |
| 10 |
14765-P08-000 |
RETAINER, VALVE SPRING |
| 11 |
14775-ZW9-000 |
SEAT, VALVE SPRING |
▶CARBURETOR (MANUAL) (22 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
16010-ZW9-003 |
GASKET SET |
| 2 |
16011-ZV4-005 |
VALVE SET, FLOAT |
| 3 |
16013-ZW9-003 |
FLOAT SET |
| 4 |
16016-ZY1-711 |
SCREW SET |
| 5 |
16023-ZY1-003 |
CHAMBER SET, FLOAT (CARBURETOR NO.) |
| 6 |
16024-ZY3-000 |
SCREW SET, DRAIN |
| 7 |
16028-ZV4-650 |
SCREW SET |
| 8 |
16071-ZV4-005 |
SCREW, PLUG |
| 9 |
16081-ZV4-650 |
SCREW-WASHER |
| 10 |
16100-ZY1-714 |
CARBURETOR ASSY. (BJ08A B) |
| 11 |
16120-ZY1-003 |
VALVE SET, STARTER |
| 12 |
16121-ZW9-003 |
SCREW, PAN |
| 13 |
16150-ZY1-003 |
JET SET (#55) |
| 14 |
16166-ZY1-003 |
NOZZLE, MAIN |
| 15 |
16211-ZY1-000 |
INSULATOR, CARBURETOR |
| 16 |
16221-ZY1-000 |
GASKET, CARBURETOR |
| 17 |
17950-ZY1-003 |
CABLE, CHOKE |
| 18 |
95003-07008-60M |
BULK HOSE, VINYL (4X7X8000) (4X7X200) |
| 19 |
99101-ZV5-1280 |
JET, MAIN (#128) (CARBURETOR NO.) |
| 20 |
16119-ZW9-013 |
CAP |
| 21 |
16123-ZY1-013 |
PLUNGER SET, ACCELERATOR PUMP (CARBURETOR NO.) |
| 22 |
16163-GHB-600 |
CLIP, TUBE |
▶CRANKSHAFT/PISTON (8 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
13010-ZY1-003 |
RING SET, PISTON |
| 2 |
13101-ZY1-000 |
PISTON |
| 3 |
13111-ZW9-000 |
PIN, PISTON |
| 4 |
13210-ZY1-013 |
ROD, CONNECTING |
| 5 |
13311-ZY1-000 |
CRANKSHAFT |
| 6 |
90001-ZW9-000 |
BOLT, CONNECTING ROD (6X34) |
| 7 |
90741-ZW9-000 |
KEY, SPECIAL (16X13) |
| 8 |
94601-16000 |
CLIP, PISTON PIN (16MM) |
▶CYLINDER BLOCK (17 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
11300-ZY1-405 |
COVER ASSY., CRANKCASE |
| 2 |
11340-ZY1-000 |
COVER, CRANKCASE SIDE |
| 3 |
11342-ZW9-000 |
GASKET, CRANKCASE SIDE COVER |
| 4 |
12000-ZY1-415ZA |
BLOCK ASSY., CYLINDER *NH8* (DARK GRAY) |
| 5 |
12166-ZW9-030 |
STOPPER, ENGINE SIDE |
| 6 |
15400-ZZ3-003 |
FILTER, OIL (DENSO) |
| 7 |
15655-ZW9-000 |
DIPSTICK, OIL |
| 9 |
35490-ZW9-003 |
SWITCH ASSY., OIL PRESSURE |
| 10 |
90004-ZW9-000 |
BOLT, FLANGE (6X28) |
| 11 |
90011-ZW9-000 |
BOLT, FLANGE (6X14) (CT200) |
| 12 |
90012-ZW9-030 |
BOLT, FLANGE (6X22) (CT200) |
| 13 |
90018-PN3-000 |
HOLDER, OIL FILTER |
| 14 |
90705-PG2-000 |
PIN, DOWEL (14X20) |
| 15 |
91203-ZY1-003 |
OIL SEAL (28X45X8) |
| 16 |
91213-PL2-003 |
OIL SEAL (35X50X8) (NOK) |
| 17 |
94301-10120 |
PIN, DOWEL (10X12) |
| 18 |
94302-08140 |
PIN B, DOWEL (8X14) |
▶CYLINDER HEAD (15 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
12166-ZW9-030 |
STOPPER, ENGINE SIDE |
| 2 |
12210-ZY1-405ZA |
CYLINDER HEAD *NH8* (DARK GRAY) |
| 3 |
12251-ZY1-003 |
GASKET, CYLINDER HEAD |
| 4 |
12310-ZW9-030 |
COVER, HEAD |
| 5 |
12312-ZW9-000 |
GASKET, HEAD COVER |
| 6 |
15611-921-000 |
CAP, OIL (YELLOW) |
| 8 |
35673-ZW5-003 |
SENSOR ASSY., WATER TEMPERATURE |
| 9 |
90003-ZY9-M01 |
BOLT, FLANGE (6X22) |
| 10 |
90007-ZW9-003 |
BOLT, FLANGE (8X83) |
| 11 |
90011-ZW9-000 |
BOLT, FLANGE (6X14) (CT200) |
| 12 |
90055-ZZ5-M01 |
BOLT, FLANGE (8X40) |
| 14 |
91301-805-000 |
O-RING (26X2.7) |
| 15 |
91307-PK2-005 |
O-RING (9.5X1.5) (HONDA KIKAKI) |
| 17 |
98059-55926 |
SPARK PLUG (U16FER9) |
| 18 |
90204-ZW9-310 |
NUT, INSERT |
▶ENGINE COVER (1) (11 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
63100-ZY1-010ZA |
COVER, ENGINE *NH282MU* (OYSTER SILVER METALLIC-U) |
| 2 |
63102-ZY1-300 |
SEAL, ENGINE COVER |
| 3 |
63232-ZW9-010 |
LEVER, FASTENER |
| 4 |
63236-ZW9-010 |
WIRE, FASTENER (3.2) |
| 7 |
63718-ZW9-000 |
RUBBER, CUSHION |
| 8 |
63719-ZW9-000 |
SEAL, COVER (LOWER) |
| 9 |
82873-ZV5-003 |
GROMMET, WATER CHECK |
| 10 |
90181-ZW9-010 |
BOLT-WASHER, SOCKET (5X10) |
| 11 |
90502-ZV4-000 |
WASHER, PLAIN (5MM) |
| 12 |
90754-ZW9-000 |
PIN (5X47) |
| 13 |
91452-ZW9-000 |
RING, STOPPER |
▶EXHAUST CHAMBER COVER (3 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
18231-ZY1-000 |
COVER, EX. CHAMBER |
| 2 |
18233-ZW9-003 |
GASKET, EX. CHAMBER |
| 3 |
90009-ZW9-000 |
BOLT, FLANGE (6X23) |
▶FLYWHEEL (7 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
28451-ZW9-003 |
PULLEY, STARTER |
| 2 |
30595-ZY1-003 |
COIL ASSY., POWER |
| 3 |
31110-ZY1-000ZA |
FLYWHEEL *TBLACK* (BLACK) |
| 5 |
31630-ZY1-901 |
COIL ASSY., CHARGE (6A) |
| 7 |
90006-ZW9-030 |
BOLT, FLANGE (6X52) (CT200) |
| 8 |
90202-ZY1-000 |
NUT, SPECIAL (16MM) |
| 9 |
95701-06010-08 |
BOLT, FLANGE (6X10) |
▶FUEL PUMP (1) (12 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
16700-ZW9-003 |
PUMP ASSY., FUEL (MSDS) |
| 2 |
06167-ZY1-315 |
CHAMBER KIT, FUEL |
| 4 |
16793-ZY1-020 |
SUSPENSION, FUEL CHAMBER |
| 5 |
16861-ZY1-010 |
TUBE B, FUEL |
| 7 |
16915-ZV4-000 |
SUSPENSION, STRAINER |
| 8 |
17439-PY3-A01 |
CLAMP, TUBE (7.5-11.5) (BLACK) |
| 9 |
17701-ZY1-020 |
TUBE D, FUEL |
| 10 |
17702-ZY1-010 |
TUBE C, FUEL |
| 11 |
90003-ZY9-M01 |
BOLT, FLANGE (6X22) |
| 12 |
90603-ZV4-000 |
CLIP, TUBE (B10) |
| 13 |
90604-ZV0-000 |
CLIP, TUBE (B12) |
| 14 |
91303-ZW9-000 |
O-RING (31.2X2.4) |
▶FUEL PUMP (2) (13 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
16700-ZW9-003 |
PUMP ASSY., FUEL (MSDS) |
| 2 |
06167-ZY1-315 |
CHAMBER KIT, FUEL |
| 3 |
16793-ZY1-020 |
SUSPENSION, FUEL CHAMBER |
| 4 |
16793-ZY1-020 |
SUSPENSION, FUEL CHAMBER |
| 5 |
16861-ZY1-010 |
TUBE B, FUEL |
| 7 |
16915-ZV4-000 |
SUSPENSION, STRAINER |
| 8 |
17439-PY3-A01 |
CLAMP, TUBE (7.5-11.5) (BLACK) |
| 9 |
17701-ZY1-020 |
TUBE D, FUEL |
| 11 |
90003-ZY9-M01 |
BOLT, FLANGE (6X22) |
| 13 |
90603-ZV4-000 |
CLIP, TUBE (B10) |
| 14 |
90604-ZV0-000 |
CLIP, TUBE (B12) |
| 15 |
90679-SG9-E01 |
BAND, SUCTION HOSE (BLACK) |
| 16 |
91303-ZW9-000 |
O-RING (31.2X2.4) |
▶FUEL TANK (15 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
16900-ZV4-A22 |
JOINT ASSY., FUEL |
| 2 |
16977-ZV5-A00 |
FITTING, QUICK DISCONNECT |
| 3 |
16979-ZV5-901 |
O-RING |
| 4 |
17500-ZZ5-003 |
TANK ASSY., FUEL |
| 5 |
17583-ZV5-901 |
FILTER, FUEL |
| 8 |
17624-ZV5-902 |
GASKET, FUEL CAP |
| 9 |
17650-ZW9-023 |
CONNECTOR ASSY., FUEL (A) |
| 10 |
17660-ZW9-003 |
CONNECTOR, FUEL |
| 11 |
17661-921-010 |
BULB, PRIMER |
| 12 |
17665-ZV5-000 |
VALVE, IN. |
| 13 |
17680-ZV4-000 |
VALVE, OUTLET |
| 14 |
17700-ZW9-030 |
TUBE ASSY., FUEL |
| 15 |
17701-ZV5-000 |
TUBE, FUEL LONG (7.3X2000) |
| 17 |
17703-921-010 |
BAND, TUBE CLIP (20MM) |
| 18 |
17704-ZV4-010 |
BAND, TUBE CLIP (12.5MM) |
▶GEAR CASE ASSY (1 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
41005-ZY1-615ZA |
CASE ASSY., GEAR *NH282MU* (L) (OYSTER SILVER METALLIC-U) |
▶GEAR CASE/EXTENSION CASE (19 parts)
| Ref |
OEM Part # |
Part Name |
| 2 |
40201-ZW9-C10ZA |
CASE, EXTENSION *NH282MU* (L) (OYSTER SILVER METALLIC-U) |
| 5 |
41101-ZY1-C00ZA |
CASE, GEAR *NH282MU* (OYSTER SILVER METALLIC-U) |
| 6 |
41104-ZV5-000 |
SCREEN, R. WATER |
| 7 |
41105-ZV5-000 |
SCREEN, L. WATER |
| 8 |
41106-ZW9-000 |
METAL, ANODE |
| 9 |
50111-ZW9-000ZA |
HOUSING, MOUNTING (LOWER) *NH282MU* (OYSTER SILVER METALLIC-U) |
| 10 |
63702-ZW9-000 |
RUBBER, COVER (LOWER) |
| 11 |
90008-ZW9-000 |
BOLT, FLANGE (8X35) |
| 12 |
90009-ZW9-000 |
BOLT, FLANGE (6X23) |
| 13 |
90101-ZW9-003 |
BOLT, OIL CHECK |
| 14 |
90105-ZW9-000 |
BOLT, FLANGE (6X20) |
| 15 |
90107-ZW9-000 |
BOLT, FLANGE (6X75) |
| 16 |
90113-ZV5-000 |
BOLT, HEX. (6X25) |
| 19 |
90205-PP9-020 |
NUT, SELF-LOCK (6MM) |
| 20 |
90302-ZV4-000 |
NUT, SELF-LOCK (5MM) |
| 23 |
90756-ZV5-000 |
PIN, DOWEL (6X10) |
| 24 |
91052-ZY1-003 |
BEARING, NEEDLE (15X22X20) |
| 25 |
91301-216-000 |
O-RING (5.5X1.5) |
| 26 |
93700-05028-4J |
SCREW, OVAL (5X28) |
▶HANDLEBAR (24 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
17838-ZW9-000 |
LINKAGE, PIVOT |
| 2 |
17910-ZY1-013 |
CABLE, THROTTLE |
| 3 |
17917-ZW9-000 |
PIVOT, THROTTLE CABLE |
| 4 |
24625-ZV5-010 |
PLATE, SHIFT |
| 8 |
35180-ZY1-023 |
SWITCH ASSY., EMERGENCY STOP |
| 11 |
36105-ZW9-003 |
TUBE, SPIRAL B |
| 12 |
36182-ZV4-651 |
WIRE, EMERGENCY |
| 13 |
40105-ZV4-000 |
GROMMET, OIL CASE (A) |
| 14 |
53103-ZW9-000 |
PIN, THROTTLE CABLE |
| 15 |
53110-ZW9-010ZA |
HANDLEBAR *NH246* (LOOSY GRAY) |
| 16 |
53131-ZW9-C00ZA |
BRACKET, HANDLEBAR *NH246* (LOOSY GRAY) |
| 17 |
53130-ZW9-000 |
GRIP ASSY., THROTTLE FRICTION |
| 18 |
53133-ZW9-000 |
PAD, THROTTLE FRICTION |
| 19 |
53130-ZW9-000 |
GRIP ASSY., THROTTLE FRICTION |
| 20 |
53141-ZW9-000 |
PIPE, GRIP |
| 21 |
53165-ZW9-000 |
RUBBER, GRIP |
| 22 |
53171-ZW9-000 |
SCREW, HANDLE PIVOT |
| 24 |
90102-ZW9-000 |
BOLT, FLANGE (6X12) |
| 25 |
90165-ZW9-000 |
BOLT-WASHER (10X55) |
| 26 |
90302-921-000 |
NUT, HEX. (16MM) |
| 27 |
90305-ZV4-000 |
NUT, SELF-LOCK (8MM) |
| 28 |
90514-921-000 |
WASHER (8MM) |
| 30 |
93903-243J0 |
SCREW, TAPPING (4X12) |
| 32 |
53130-ZW9-000 |
GRIP ASSY., THROTTLE FRICTION |
▶IGNITION COIL/C.D.I. UNIT (12 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
30310-ZY1-003 |
COIL ASSY., PULSER |
| 2 |
30400-ZY1-003 |
MODULE, IGNITION CONTROL (CDI) |
| 3 |
30418-ZY1-010 |
PLATE, C.D.I. |
| 5 |
30506-ML4-003 |
SUSPENSION, IGNITION COIL |
| 7 |
32108-ZY1-010 |
BRACKET, C.D.I. |
| 8 |
32109-ZY1-000 |
BRACKET, CONNECTOR |
| 9 |
90011-ZW9-000 |
BOLT, FLANGE (6X14) (CT200) |
| 10 |
90016-ZW9-000 |
BOLT, FLANGE (6X25) |
| 11 |
90018-ZW9-000 |
SCREW-WASHER (5X16) |
| 12 |
90684-SB3-003 |
CLIP, FUEL TUBE |
| 13 |
91501-SM4-003 |
CLIP, ANCHOR |
| 14 |
91540-S30-003 |
CLIP, HARNESS BAND (151.5MM) (NATURAL) |
▶LABELS (13 parts)
| Ref |
OEM Part # |
Part Name |
| 2 |
87121-ZV9-800 |
MARK, RR. (20) |
| 4 |
87125-ZV4-A20 |
MARK, SPARE CLIP (ENGLISH) |
| 6 |
87131-ZW9-S00 |
MARK, SIDE |
| 7 |
87132-ZV4-G00 |
MARK, SIDE STRIPE (HONDA) |
| 8 |
87133-ZW9-S00 |
MARK, POWER THRUST |
| 13 |
87227-ZV7-000 |
MARK, OIL PRESSURE |
| 14 |
87511-ZW9-000 |
MARK, CHANGE |
| 15 |
87531-ZW9-640 |
LABEL, OIL CAUTION (ENGLISH) |
| 16 |
87532-ZW9-640 |
MARK, THROTTLE (ENGLISH) |
| 17 |
87535-ZV5-620 |
LABEL, STORING CAUTION (ENGLISH) |
| 18 |
87538-ZW1-740 |
LABEL, WARNING OPERATOR (ENGLISH) |
| 19 |
87541-ZV5-621 |
LABEL, ASSIST TILT CAUTION (ENGLISH) |
| 20 |
87546-ZW9-640 |
MARK, EMERGENCY STARTER (ENGLISH) |
▶MUFFLER COVER (10 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
17203-ZY1-000 |
TRAP, FLAME |
| 2 |
17380-ZY1-010 |
PLATE, MUFFLER |
| 3 |
17384-ZY1-000 |
GASKET, MUFFLER PLATE |
| 4 |
17390-ZY1-000 |
COVER, MUFFLER |
| 5 |
17394-ZY1-000 |
GASKET, MUFFLER COVER |
| 6 |
17532-ZM3-010 |
RUBBER A, TANK MOUNTING |
| 7 |
90003-ZY9-M01 |
BOLT, FLANGE (6X22) |
| 8 |
90010-ZY1-030 |
BOLT, FLANGE (6X106) |
| 9 |
91401-ZW9-000 |
TUBE, BREATHER |
| 10 |
95003-07008-60M |
BULK HOSE, VINYL (4X7X8000) (4X7X120) |
▶OIL CASE/OIL PAN GASKET (4 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
11381-ZW9-003 |
GASKET, OIL PAN |
| 2 |
19252-ZW9-000 |
GROMMET, WATER TUBE |
| 3 |
90008-ZW9-000 |
BOLT, FLANGE (8X35) |
| 4 |
94301-06100 |
PIN, DOWEL (6X10) |
▶OIL CASE/SHIFT SHAFT (HANDLE SPECIFICATION) (26 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
11321-ZY1-425ZA |
CASE, OIL *NH282MU* (OYSTER SILVER METALLIC-U) |
| 3 |
17710-ZW9-033 |
CONNECTOR ASSY., FUEL (B) |
| 4 |
17936-921-000 |
WASHER, PIVOT |
| 5 |
24218-ZW9-000 |
SPRING, CLICK |
| 6 |
24221-ZW9-010 |
SPRING, CLICK ASSIST |
| 7 |
24611-ZW9-010 |
SHAFT, SHIFT |
| 8 |
24613-ZW9-000 |
ROD, LINK |
| 9 |
24614-ZW9-020 |
LEVER, SHIFT |
| 10 |
24626-ZW9-010 |
PLATE, SHIFT SHAFT |
| 14 |
37210-ZY1-003 |
LAMP ASSY., INDICATOR |
| 15 |
40105-ZW9-020 |
GROMMET A, OIL CASE |
| 16 |
40106-ZW9-630 |
GROMMET B, OIL CASE |
| 19 |
40108-ZW9-000 |
GROMMET D, OIL CASE |
| 20 |
40109-ZW9-000 |
GROMMET E, OIL CASE |
| 22 |
90101-ZW9-003 |
BOLT, OIL CHECK |
| 23 |
90105-ZV1-000 |
BOLT, REVERSE LOCK |
| 24 |
90112-ZY1-000 |
BOLT, SPECIAL (6X22) (CT200) |
| 27 |
90452-GK4-600 |
WASHER, PLAIN (5MM) |
| 28 |
90506-ZW9-000 |
WASHER, WAVE (10MM) |
| 29 |
90511-ZW9-000 |
WASHER, PLAIN (9MM) |
| 30 |
90603-ZV4-000 |
CLIP, TUBE (B10) |
| 31 |
90604-ZV0-000 |
CLIP, TUBE (B12) |
| 32 |
90759-ZV1-000 |
PIN, SPLIT (2.0) |
| 33 |
91202-ZY1-013 |
SEAL, WATER (15X28X6) |
| 34 |
91301-216-000 |
O-RING (5.5X1.5) |
| 35 |
91402-ZW9-010 |
TUBE, WATER CHECK |
▶OIL PUMP (18 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
15100-ZW9-030 |
PUMP ASSY., OIL |
| 2 |
15121-ZW9-000 |
COVER, OIL PUMP |
| 3 |
15131-414-000 |
ROTOR (INNER) |
| 4 |
15133-414-000 |
ROTOR (OUTER) |
| 5 |
15136-ZW9-000 |
SHAFT, OIL PUMP |
| 6 |
15211-ZW9-010 |
FLANGE, OIL STRAINER |
| 7 |
15212-ZW9-000 |
O-RING, OIL STRAINER FLANGE |
| 8 |
15220-ZW9-003 |
STRAINER, OIL |
| 9 |
15422-ZW9-000 |
TUBE, OIL |
| 10 |
15473-881-000 |
VALVE, CHECK |
| 11 |
15474-ZW9-000 |
SPRING, CHECK VALVE |
| 12 |
90019-ZZ5-M01 |
BOLT, FLANGE (6X35) |
| 14 |
90456-333-000 |
WASHER, THRUST (11MM) |
| 15 |
91301-ZW9-000 |
O-RING, OIL PUMP |
| 16 |
91302-ZW9-000 |
O-RING, PUMP COVER |
| 17 |
91406-ZW9-003 |
CLAMP, TUBE (D17) |
| 18 |
96220-40158 |
ROLLER (4X15.8) |
| 19 |
96300-06022-09 |
BOLT, FLANGE (6X22) |
▶OUTBOARD INSTALLATION KIT (5 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
06413-ZV7-000 |
INSTALLATION KIT, OUTBOARD |
| 2 |
90129-ZV7-000 |
BOLT, HEX. (10X100) |
| 3 |
90306-ZV5-003 |
NUT, SELF-LOCK (10MM) |
| 4 |
90552-ZV7-000 |
WASHER, PLAIN (10MM) |
| 5 |
90563-ZV5-000 |
WASHER, PLAIN (10MM) |
▶PROPELLER SHAFT/PROPELLER (23 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
24101-ZW9-000 |
SHIFTER, CLUTCH |
| 2 |
24102-ZW9-000 |
PIN, SHIFTER (4X30) |
| 3 |
24103-ZV7-000 |
RING, CROSS PIN |
| 4 |
24122-ZW9-000 |
SLIDER, SHIFT |
| 5 |
24123-ZV1-300 |
SPRING, SHIFT |
| 6 |
41140-ZY1-000 |
GEAR, FR. BEVEL |
| 7 |
41149-ZW9-000 |
SHIM D (40MM) |
| 8 |
41151-ZY1-000 |
GEAR, RR. BEVEL |
| 9 |
04201-ZW9-000 |
SHAFT KIT, PROPELLER (INCLUDES PROPELLER THRUST WASHER) |
| 10 |
41200-ZW9-020ZA |
HOLDER ASSY., PROPELLER SHAFT *NH282MU* (OYSTER SILVER METALLIC-U) |
| 11 |
58130-ZY0-B92ZA |
PROPELLER, FOUR BLADES (10X7-5/8) *NH283* (STIN GRAY) |
| 12 |
90105-ZW9-000 |
BOLT, FLANGE (6X20) |
| 13 |
90301-ZV4-000 |
NUT, CASTLE (10MM) |
| 14 |
90501-ZW9-000 |
WASHER, PROPELLER THRUST |
| 15 |
90503-ZW9-000 |
WASHER (18MM) |
| 16 |
90513-921-000 |
WASHER (10MM) |
| 17 |
90758-ZV4-000 |
PIN, SPLIT (3MM) |
| 18 |
91054-ZV5-003 |
BEARING (25X47X15) |
| 19 |
91072-KT7-003 |
BEARING, NEEDLE (17X24X20) (NTN) |
| 20 |
91251-935-004 |
SEAL, WATER (17MM) (NOK) |
| 21 |
91352-ZW9-003 |
O-RING (59.4X3.1) |
| 22 |
96100-60050-00 |
BEARING, RADIAL BALL (6005) |
| 23 |
04201-ZW9-000 |
SHAFT KIT, PROPELLER (INCLUDES PROPELLER THRUST WASHER) |
▶RECOIL STARTER (28 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
28400-ZY1-033 |
STARTER ASSY., RECOIL |
| 3 |
28414-ZY1-000 |
CASE B, STARTER |
| 4 |
28418-ZW9-003 |
GUIDE, RECOIL STARTER |
| 5 |
28421-ZW9-003 |
REEL, RECOIL STARTER |
| 6 |
04284-ZY1-000 |
RATCHET SET, STARTER |
| 7 |
04284-ZY1-000 |
RATCHET SET, STARTER |
| 8 |
28431-ZW9-003 |
PLATE, FRICTION |
| 9 |
28432-ZV4-003 |
WASHER |
| 10 |
28433-ZV7-003 |
WASHER, THRUST |
| 11 |
28435-ZV4-003 |
STOPPER, REEL |
| 12 |
28436-ZV4-003 |
ARM, STOPPER |
| 13 |
28437-ZV4-003 |
SPRING, STOPPER |
| 14 |
28438-ZV4-003 |
PIN, SPLIT |
| 15 |
28441-ZW9-003 |
SPRING, FRICTION |
| 16 |
28442-ZW9-003 |
SPRING, RECOIL STARTER |
| 17 |
28443-ZW9-003 |
SPRING, RETURN |
| 18 |
28455-ZY1-000 |
SEAL, RECOIL |
| 19 |
28461-ZV4-013 |
GRIP, STARTER |
| 21 |
28466-ZW9-003 |
CAP, STARTER KNOB |
| 22 |
28471-ZV7-003 |
ROLLER, STARTER |
| 23 |
28476-ZV7-003 |
GUIDE, ROLLER |
| 24 |
80103-GJ5-000 |
GROMMET, ENGINE COVER |
| 25 |
90003-ZY9-M01 |
BOLT, FLANGE (6X22) |
| 26 |
90021-ZV4-003 |
BOLT, HEX. (6X25) |
| 27 |
90022-ZV4-003 |
BOLT, HEX. (6X14) |
| 28 |
91403-ZW9-000 |
TUBE, WATER DRAIN |
| 29 |
95005-80001-30M |
BULK HOSE, VACUUM (8X1000) (8X240) |
| 30 |
04284-ZY1-000 |
RATCHET SET, STARTER |
▶SHOCK ABSORBER (1 parts)
| Ref |
OEM Part # |
Part Name |
| 3 |
90205-PP9-020 |
NUT, SELF-LOCK (6MM) |
▶STERN BRACKET (2) (23 parts)
| Ref |
OEM Part # |
Part Name |
| 2 |
50122-935-010 |
PLATE, PUSH |
| 3 |
50300-ZY1-872ZA |
BRACKET, R. STERN *NH282MU* (OYSTER SILVER METALLIC-U) |
| 4 |
50310-ZY1-873ZA |
BRACKET, L. STERN *NH282MU* (OYSTER SILVER METALLIC-U) |
| 5 |
50323-ZW9-300 |
GRIP, CLAMP |
| 6 |
50325-ZW9-830 |
SCREW, CLAMP |
| 7 |
50331-ZV5-000 |
CAP, TILTING BOLT |
| 9 |
50340-ZY1-871 |
ROD, ADJUSTING |
| 10 |
50342-ZV5-300 |
STOPPER, ROD |
| 11 |
50343-921-300 |
SPRING, ADJUSTING ROD |
| 12 |
50381-ZZ5-000 |
SHAFT, TILTING |
| 14 |
56513-ZV5-000 |
BUSH, CYLINDER (LOWER) |
| 15 |
56539-ZY1-870 |
COLLAR, CYLINDER (LOWER) |
| 16 |
68111-ZW9-831 |
HANDLE, CARRYING REMOTE |
| 17 |
90108-ZY1-870 |
BOLT, HEX. (8X203) |
| 18 |
90119-ZV5-000 |
SCREW, PAN (6X8) |
| 19 |
90304-ZV5-013 |
NUT, SELF-LOCK (7/8-14UNF) |
| 20 |
90305-ZV4-000 |
NUT, SELF-LOCK (8MM) |
| 21 |
90507-ZV4-000 |
WASHER, PLAIN (8MM) |
| 22 |
90517-ZV5-000 |
WASHER, WAVE (22MM) |
| 23 |
90855-ZW9-300 |
RIVET (4X22.6) |
| 26 |
94305-25083 |
PIN, SPRING (2.5X8) |
| 27 |
41106-ZW9-000 |
METAL, ANODE |
| 28 |
90102-ZW9-000 |
BOLT, FLANGE (6X12) |
▶SWIVEL CASE (2) (30 parts)
| Ref |
OEM Part # |
Part Name |
| 2 |
24210-ZV1-010 |
SPRING, CLICK |
| 3 |
50100-ZW9-631 |
FRAME, MOUNTING (L) |
| 4 |
50150-ZY1-000 |
RUBBER, MOUNTING (UPPER) |
| 5 |
50152-ZW9-000 |
RUBBER, MOUNTING (LOWER) |
| 6 |
50153-ZW9-000 |
COVER, MOUNTING RUBBER (UPPER) |
| 8 |
50201-ZY1-870ZA |
CASE, SWIVEL *NH282MU* (L)(PT) (OYSTER SILVER METALLIC-U) |
| 9 |
50211-ZW9-000 |
LINER, SWIVEL CASE |
| 10 |
50212-ZW9-003 |
BLOCK, FRICTION |
| 11 |
50214-ZV5-003 |
BUSH, SWIVEL CASE |
| 12 |
50215-ZW9-000 |
COLLAR, SWIVEL CASE |
| 13 |
50218-ZW9-010 |
PLATE, FRICTION |
| 14 |
50219-ZW9-010 |
LEVER, FRICTION |
| 15 |
50522-ZV5-000 |
BUSH, TILT ARM |
| 16 |
50527-ZY1-870 |
BRACKET, TILTING |
| 17 |
50529-ZY1-870 |
STOPPER, TILT |
| 19 |
56513-ZV5-000 |
BUSH, CYLINDER (LOWER) |
| 20 |
56532-ZY1-870 |
PIN, CYLINDER (UPPER) |
| 21 |
90102-ZW9-000 |
BOLT, FLANGE (6X12) |
| 23 |
90154-ZW9-000 |
BOLT, FLANGE (10X25) |
| 24 |
90159-ZW9-000 |
BOLT, FLANGE (8X45) |
| 26 |
90162-ZW9-000 |
BOLT, STUD (8X26) |
| 28 |
90305-ZW9-000 |
NUT, SELF-LOCK (8MM) |
| 30 |
90454-881-000 |
WASHER, THRUST |
| 32 |
90514-921-000 |
WASHER (8MM) |
| 33 |
90517-ZW9-000 |
WASHER, NYLON (8MM) |
| 34 |
90951-ZV7-010 |
NIPPLE, GREASE |
| 35 |
91361-VD6-003 |
O-RING (34X2.4) |
| 37 |
94305-25203 |
PIN, SPRING (2.5X20) |
| 38 |
94540-15029 |
E-RING (15MM) |
| 39 |
90103-ZW9-010 |
BOLT, FLANGE (6X12) |
▶THERMOSTAT (10 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
12155-ZV4-A01 |
METAL, ANODE |
| 2 |
19279-ZW9-010 |
SPRING, FLUSH VALVE |
| 3 |
19291-ZW9-000 |
VALVE, FLASH |
| 4 |
19297-ZW9-010 |
GASKET, FLASH VALVE |
| 6 |
19315-ZW9-000 |
COVER, THERMOSTAT |
| 8 |
19361-ZW9-405 |
COVER, WATER JACKET |
| 9 |
19371-ZW9-000 |
GASKET, EX. WATER JACKET COVER |
| 10 |
90002-ZW9-030 |
BOLT, FLANGE (6X36) (CT200) |
| 11 |
90012-ZW9-030 |
BOLT, FLANGE (6X22) (CT200) |
| 13 |
19303-ZW9-003 |
RUBBER, RING |
▶TIMING BELT (5 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
14315-ZY1-000 |
PULLEY, TIMING |
| 2 |
14316-ZY1-000 |
FLANGE, TIMING PULLEY |
| 3 |
14321-ZW9-003 |
PULLEY, CAMSHAFT |
| 4 |
14400-ZY1-013 |
BELT, TIMING (71RU13 B-333) |
| 5 |
90201-ZY1-000 |
NUT, LOCK (30MM) |
▶TOOLS (11 parts)
| Ref |
OEM Part # |
Part Name |
| 2 |
28462-ZW9-003 |
ROPE, RECOIL STARTER (1300MM) |
| 3 |
36187-ZV4-652 |
CLIP, EMERGENCY LOCK |
| 5 |
89216-130-690 |
WRENCH, SPARK PLUG |
| 6 |
89217-355-000 |
WRENCH, BOX (10MM) |
| 7 |
89301-921-010 |
SCREWDRIVER, CHECK BOLT |
| 8 |
99001-10120 |
SPANNER (10X12) |
| 9 |
89210-GBJ-J10 |
PLIERS (135) (KOWA) |
| 10 |
99003-10000 |
DRIVER 1, PLUS SCREW (NO.2) |
| 11 |
99003-30000 |
DRIVER 3, MINUS SCREW (NO.2) |
| 12 |
99003-50000 |
GRIP, SCREW DRIVER |
| 13 |
99008-01600 |
BAG, TOOL (160MM) |
▶WATER HOSE JOINT KIT (5 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
06190-ZV1-860 |
JOINT KIT, WATER HOSE |
| 2 |
19270-881-812 |
NUT, WATER MOUTH |
| 3 |
19271-ZV1-810 |
JOINT, WATER HOSE |
| 4 |
19271-ZV1-810 |
JOINT, WATER HOSE |
| 5 |
19272-881-810 |
SEAT, WATER MOUTH |
▶WATER PUMP IMPELLER KIT (9 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
06192-ZW9-A30 |
PUMP KIT, IMPELLER |
| 3 |
19210-ZW9-A32 |
IMPELLER, PUMP (UL) |
| 4 |
19215-ZW9-020 |
HOUSING ASSY., IMPELLER |
| 5 |
19231-ZW9-000 |
COVER, IMPELLER |
| 6 |
19232-ZW9-000 |
GASKET, IMPELLER |
| 7 |
19253-ZW9-000 |
RING, WATER TUBE SEAL |
| 8 |
90121-ZW9-000 |
BOLT-WASHER (6X50) |
| 9 |
90752-ZW9-A30 |
KEY, WOODRUFF |
| 10 |
91301-ZG3-000 |
O-RING (42.2X2.4) |
▶WATER PUMP/VERTICAL SHAFT (1) (32 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
12216-ZE2-300 |
CLIP, VALVE GUIDE |
| 2 |
15332-ZY1-000 |
GUIDE, OIL (S,L) |
| 3 |
19210-ZW9-A32 |
IMPELLER, PUMP (UL) |
| 4 |
19215-ZW9-020 |
HOUSING ASSY., IMPELLER |
| 5 |
19231-ZW9-000 |
COVER, IMPELLER |
| 6 |
19232-ZW9-000 |
GASKET, IMPELLER |
| 7 |
19240-ZY1-C00 |
HOUSING, WATER PUMP (S,L) |
| 8 |
19243-ZW9-000 |
GROMMET, WATER PUMP HOUSING |
| 9 |
19251-ZW9-630 |
TUBE, WATER (L) |
| 10 |
19253-ZW9-000 |
RING, WATER TUBE SEAL |
| 11 |
24311-ZY1-C10 |
ROD B, SHIFT (L) |
| 12 |
24312-ZV7-000 |
JOINT, SHIFT ROD |
| 13 |
24320-ZW9-630 |
ROD A, SHIFT (L) |
| 14 |
24341-ZY1-C00 |
ROD, PUSH |
| 15 |
41112-ZY1-C10 |
SHAFT, VERTICAL (L) |
| 16 |
41116-ZW9-A30 |
SLINGER, OIL (UL) |
| 17 |
41131-ZY1-000 |
GEAR, PINION |
| 18 |
41135-ZY1-000 |
WASHER A, THRUST BEARING |
| 19 |
41137-ZY1-010 |
WASHER C, THRUST BEARING |
| 20 |
90102-ZW9-000 |
BOLT, FLANGE (6X12) |
| 21 |
90105-ZW9-000 |
BOLT, FLANGE (6X20) |
| 22 |
90121-ZW9-000 |
BOLT-WASHER (6X50) |
| 23 |
90515-ZW9-000 |
PLATE, WATER TUBE SETTING |
| 24 |
90752-ZW9-A30 |
KEY, WOODRUFF |
| 25 |
91052-ZV4-003 |
BEARING, NEEDLE (15X21X12) |
| 26 |
91251-ZW9-003 |
SEAL, WATER (15X24X5) |
| 27 |
91253-ZW9-003 |
SEAL, WATER (6MM) |
| 28 |
91301-ZG3-000 |
O-RING (42.2X2.4) |
| 29 |
91351-ZW9-000 |
O-RING, WATER PUMP HOUSING |
| 30 |
94001-06490-0S |
NUT, HEX. (6MM) |
| 31 |
94540-08018 |
E-RING (8MM) |
| 32 |
96220-25118 |
ROLLER (2.5X11.8) |
▶WIRE HARNESS/REGULATOR /STARTER CABLE (1) (19 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
17940-ZW9-010 |
CABLE, NEUTRAL STARTING |
| 2 |
31575-ZW9-000 |
WIRE ASSY., BATTERY CHARGE |
| 3 |
31650-ZY1-000 |
RECEPTACLE ASSY., CHARGE |
| 5 |
32100-ZY1-000 |
WIRE HARNESS ASSY. |
| 6 |
32103-ZW9-020 |
BRACKET, CLIP F |
| 7 |
32112-ZW9-010 |
BRACKET, STARTER CABLE |
| 9 |
32115-ZW9-010 |
BRACKET, FUSE CASE |
| 11 |
32118-ZW9-731 |
BRACKET, E-CLIP |
| 15 |
32901-952-770 |
TIE, CABLE (2.4X92) (NATURAL) |
| 16 |
36104-ZW9-003 |
TUBE, SPIRAL A |
| 24 |
90011-ZW9-000 |
BOLT, FLANGE (6X14) (CT200) |
| 25 |
90013-ZW9-000 |
BOLT, FLANGE (6X12) |
| 26 |
90114-ZW9-030 |
BOLT, FLANGE (6X26) (CT200) |
| 28 |
90650-ZY1-003 |
TIE, CABLE |
| 29 |
91540-S30-003 |
CLIP, HARNESS BAND (151.5MM) (NATURAL) |
| 31 |
91567-SE0-003 |
BAND, WIRE HARNESS (93.5MM) (WHITE) |
| 32 |
98200-32000 |
FUSE, BLADE (20A) |
| 35 |
32521-ZW9-000 |
CONNECTOR, DUMMY |
| 36 |
38218-ZW9-003 |
COVER ASSY., FUSE (20A) |
100-Hour / Annual Service Checklist
Regular maintenance keeps your Honda BF20 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
-
Pro Tip: Always flush the engine with fresh water after saltwater use — even a quick 10-minute flush significantly extends component life.
-
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.
