Mercury 400 (2 CYL.) (2874704 THRU 3336257) Parts & Diagrams

🔎 Mercury 400 (2 CYL.) Reference Library — Exploded parts diagrams (17 diagrams), specifications, common issues, and maintenance checklist.

The Mercury 400 (2 CYL.) is a 4-Stroke, V10 64-degree, Naturally Aspirated outboard motor. Commonly used on jon boats, pontoons, and mid-size utility craft.

Quick Reference Specifications

Specification	Value
Engine Type	4-Stroke, V10 64-degree, Naturally Aspirated
Horsepower	40 HP
Displacement	5700 cc (5.7L / 349 CID)
Bore x Stroke	92 mm x 86 mm (3.6 in. x 3.4 in.)
Spark Plug (Type & Gap)	NGK ILFR6G-E
Engine Oil Capacity	7.0 L (7.4 US qt) with filter
Recommended Engine Oil	Mercury FourStroke 25W-40
Gear Case Oil Capacity	970 mL (32.8 oz)
Idle Speed (in gear)	650–700 RPM (in gear)
Full Throttle RPM Range	5800-6400
Fuel	Unleaded Gasoline, 87 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 Mercury 400 (2 CYL.):

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 Mercury 400 (2 CYL.).

▶BOTTOM COWL AND EXHAUST PLATE ASSEMBLY (32 parts)

Ref	OEM Part #	Part Name
1	2139-3882	BOTTOM COWL
2	48472	COVER, PLUG - BOTTOM COWL HARNESS HOLE (MANUAL)
3	10-20189	SCREW, PLUG COVER TO BOTTOM COWL (3/4")
4	32-8M0108355	HOSE, TELL TALE - COWL TO EXHAUST COVER (12")
5	22-996642	ELBOW, TELL TALE HOSE TO EXHAUST COVER
6	52889	NOZZLE, TELL TALE HOSE TO BOTTOM COWL
7	10-35519	SCREW, NOZZLE TO BOTTOM COWL
8	27-628601	GASKET, POWERHEAD TO EXHAUST EXTENSION PLATE
9	39622	SEAL, RUBBER - EXHAUST PLATE TO BOTTOM COWL
10	42818A1	PLATE ASSEMBLY, EXHAUST EXTENSION
11	12-38453	WASHER, NYLON - WATER OUTLET TUBE
12	26-38452	SEAL, RUBBER - WATER OUTLET TUBE
13	38500	RETAINER, WATER OUTLET TUBE SEAL
14	10-69069	SCREW, RETAINER TO EXHAUST PLATE (3/4")
15	27-385011	GASKET, EXHAUST PLATE TO DRIVE SHAFT HOUSING
16	10-56500	SCREW, EXHAUST PLATE TO BOTTOM COWL (1 1/4")
17	11-8M0207775	NUT, EXHAUST PLATE SCREW
18	37637	BOOT, FUEL CONNECTOR - BOTTOM COWL
19	55170	COVER, VENT - BOTTOM COWL
20	10-52867	SCREW. VENT COVER TO BOTTOM COWL
21	39616	BOOT, CONTROL CABLE - BOTTOM COWL
22	39630	CUSHION, RUBBER - BOTTOM COWL
23	39555A2	COVER PLATE ASSEMBLY
24	57596	PAD, SOUND - COVER PLATE
25	10-8M0113176	SCREW, COVER PLATE TO BOTTOM COWL
26	59065A6	STOP SWITCH ASSEMBLY MANUAL ONLY
27	30859	INSULATOR, SLEEVE - INNER SWITCH TERMINALS(MANUAL)
28	24-30858A1	SPRING AND CONTACT ASSEMBLY (MANUAL)
29	38950A1	COVER ASSEMBLY, STOP SWITCH (MANUAL)
30	12-38949	WASHER, SEALING - STOP SWITCH (MANUAL)
31	13-21972	LOCKWASHER, STOP SWITCH CONNECTOR(MANUAL)
32	11-21971	NUT, STOP SWITCH TO BOTTOM COWL (MANUAL)

▶CARBURETOR ASSEMBLY (23 parts)

Ref	OEM Part #	Part Name
--	1395-51091	REPAIR PARTS KIT (1 PER CARBURETOR) Comment: SERIAL 03043031-09999999
1	1352-4511A1	CARBURETOR ASSEMBLY, COMPLETE (WMK-1) Comment: SERIAL 03043031-09999999
2	1395-8673	FLOAT ASSEMBLY
6	1395-83181	INLET NEEDLE, SEAT AND GASKET Comment: SERIAL 03043031-09999999
9	1399-4559	COVER, FLOAT BOWL Comment: SERIAL 03043031-09999999
10	10-52195	SCREW, FLOAT BOWL COVER (SHORT)
11	10-52196	SCREW, FLOAT BOWL COVER (LONG)
12	13-26995	LOCKWASHER, FLOAT BOWL COVER SCREW
14	1399-3938	SCREEN, FILTER
16	1399-2371	COVER, STRAINER
18	10-25822	SCREW, STRAINER COVER FASTENING
19	1395-6027	SCREW, THROTTLE STOP LEVER
20	74371	CLUSTER, THROTTLE STOP
21	1395-7942	SHAFT, THROTTLE
23	1395-4540	SCREW, BODY (IDLE TUBE) Comment: SERIAL 03043031-09999999
26	1395-9017	SHUTTER, THROTTLE
28	1399-3515	SCREW, IDLE ADJUSTMENT
29	1395-4541	SCREW, PLUG - MAIN FUEL JET CHANNEL Comment: SERIAL 03043031-09999999
31	1399-3794	JET, MAIN FUEL (.074)
33	1395-4542	SCREW, PLUG - MAIN NOZZLE Comment: SERIAL 03043031-09999999
36	1395-4543	SCREW, BODY CHANNEL Comment: SERIAL 03043031-09999999
37	27-481641	GASKET, CARBURETOR FLANGE
38	11-29250	NUT, CARBURETOR MOUNTING STUD

▶CARBURETOR CHOKE LINKAGE (15 parts)

Ref	OEM Part #	Part Name
1	47969	KNOB AND SHAFT, CHOKE
2	12-30314	WASHER, CHOKE SHAFT
3	24-47968	SPRING, COMPRESSION - CHOKE SHAFT
4	55180	LEVER, CHOKE
5	1352-4511A1	CARBURETOR ASSEMBLY-SEE PAGE 7 FOR BREAKDOWN Comment: SERIAL 03043031-09999999
6	16-69016	STUD, CHOKE SHUTTER PIVOT (CARBURETOR)
7	55179	SHUTTER, CHOKE - CARBURETOR
8	24-55163	SPRING, TENSION - CHOKE SHUTTER
9	12-47960	WASHER, CHOKE SHUTTER CARBURETOR STUD
10	11-20110	NUT, CHOKE SHUTTER TO CARBURETOR STUD
11	35-57819	SCREEN, CARBURETOR
12	10-58185	SCREW, SCREEN TO CARBURETOR (1")
13	24-57818	SPRING, TENSION - SCREEN SCREW
14	12-30164	WASHER, SCREEN SCREW
15	11-20110	NUT, SCREEN SCREW

▶CLAMP AND SWIVEL BRACKET ASSEMBLY (46 parts)

Ref	OEM Part #	Part Name
1	1427-3263A1	CLAMP BRACKET ASSEMBLY
2	22477A4	THUMB SCREW ASSEMBLY
3	12-26227	WASHER, THUMB SCREW
4	17-8M0026068	TILT LOCK PIN ASSEMBLY
5	23-59623	SPACER, CLAMP BRACKET STUD
6	16-59625	STUD, CLAMP BRACKET
7	11-28770	NUT, CLAMP BRACKET STUD
8	8M0041936	TUBE, TILT - CLAMP BRACKET TO SWIVEL BRACKET
9	12-52864	WASHER, CLAMP BRACKET TO SWIVEL BRACKET
10	11-858869	NUT, TILT TUBE
11	74316A1	STEERING ARM AND SWIVEL PIN ASSEMBLY (LONG SHAFT)
12	30711	BUMPER, STEERING ARM
13	10-33986	SCREW, UPPER MOUNT TO STEERING ARM
14	62297	BUMPER, STEERING ARM
15	76535T	BRACKET, REMOTE STEERING
16	16-39781	STUD, REMOTE STEERING BRACKET TO STEERING ARM
17	11-8M0204726	NUT, REMOTE STEERING BRACKET STUD
18	10-31830	SCREW, RIDE-GUIDE KIT TO STEERING ARM (1 3/4")
19	11-8M0204726	NUT, RIDE-GUIDE KIT SCREW
20	12-52865	WASHER, SWIVEL PIN
21	38-56267	SERIAL PLATE
22	10-25612	SCREW, DRIVE - SERIAL PLATE TO SWIVEL BRACKET
23	10-26483	BOLT, CLAMP BRACKET TO BOAT TRANSOM
24	12-67981	WASHER, CLAMP BRACKET BOLT
25	11-8M0204646	NUT, CLAMP BRACKET BOLT
26	53078	CAP, PLASTIC - TILT TUBE
27	56349	SHAFT, REVERSE LOCK TO SWIVEL BRACKET
28	17-25598	ROLL PIN, REVERSE LOCK SPRING ATTACHING
29	87430	REVERSE LOCK ASSEMBLY Comment: SERIAL 03043031-09999999
30	24-29821	SPRING, REVERSE LOCK TENSION
31	18-45882	COTTER PIN, REVERSE LOCK TO SHAFT
32	47912A2	LEVER ASSEMBLY, TILT STOP - STARBOARD SIDE
33	1480-7655A1	SWIVEL BRACKET ASSEMBLY (LONG SHAFT)
34	26-32911	OIL SEAL, SWIVEL BRACKET
35	22-69059	FITTING, GREASE - SWIVEL BRACKET
36	19-77633Q	LUBRICAP, SWIVEL BRACKET GREASE FITTING
37	12-26837	WASHER, SWIVEL PIN TO BOTTOM YOKE (.065)
38	77416T1	YOKE, BOTTOM
39	11-71956	NUT, RETAINING - SWIVEL PIN
40	47913A2	LEVER ASSEMBLY, TILT LOCK - PORT SIDE
41	10-69087	SCREW, TILT LOCK AND STOP LEVER TO SWIVEL BRACKET
42	11-29250	NUT, TILT LOCK AND STOP LEVER SCREW
43	23-47911	BUSHING, TILT LOCK AND STOP LEVER
44	13-34632	WASHER, WAVE - TILT LOCK AND STOP LEVER
45	12-56720	WASHER, TILT LOCK AND STOP LEVER
46	11-29250	NUT, TILT LOCK AND STOP LEVER TO CLAMP BRACKET

▶COWLING AND FRONT COVER (16 parts)

Ref	OEM Part #	Part Name
--	92-86166Q1	GLUE, ADHESIVE - BLANKET FASTENING
1	2135-5683A3	COWL FRONT COVER ASSEMBLY
2	63324	BLANKET, SOUND ABSORBING - COWL FRONT COVER
3	63323	SPACER, SOUND ABSORBING - COWL FRONT COVER
4	60867A1	BASE, COWL FRONT COVER LATCH
5	10-22523	SCREW, LATCH BASE TO COWL FRONT COVER (3/4")
6	13-26996	LOCKWASHER, LATCH BASE SCREW
7	12-26014	WASHER, LATCH BASE SCREW
8	17-39599	PIN, PIVOT - COWL FRONT COVER LATCH HOOK
9	60866	HOOK, COWL FRONT COVER LATCH
10	24-39598	SPRING, TORSION - COWL FRONT COVER LATCH HOOK
11	2137-3878A6	WRAP AROUND COWL ASSEMBLY
12	46785A1	COWL LATCH ASSEMBLY
13	30413	HOOK, COWL LATCH FASTENING
14	57593	BLANKET, SOUND ABSORBING - WRAP AROUND COWL
15	57800	SLEEVE, SOUND ABSORBING BLANKET

▶CRANKSHAFT, PISTON AND CONNECTING ROD ASSEMBLY (19 parts)

Ref	OEM Part #	Part Name
-	39-78811A12	RING, PISTON (.015 OVERSIZE)
1	444-3875A2	CRANKSHAFT ASSEMBLY
2	30-62567T	BALL BEARING, CRANKSHAFT (UPPER)
3	540-7238A2	MAIN BEARING ASSEMBLY, VALVE TYPE
4	17-20032	DOWEL PIN, MAIN BEARING
5	10-45775	SCREW, MAIN BEARING CLAMPING
6	11-45774	NUT, MAIN BEARING CLAMPING SCREW
7	34-56007A1	REED SET, MAIN BEARING (MATCHED)
8	34-56008	REED STOP, MAIN BEARING REED VALVES
9	10-20055	SCREW, REED STOP MOUNTING
10	624-8101A3	CONNECTING ROD ASSEMBLY
11	10-54803	SCREW, CONNECTING ROD
12	11-49091	NUT, CONNECTING ROD SCREW
13	31-62596A1	BEARING ASSEMBLY, CRANKPIN
14	29-8M0214934	BEARING, NEEDLE - PISTON PIN
15	12-8M0032839	WASHER, NEEDLE BEARING RETAINING
16	774-9137A12	PISTON AND PISTON PIN ASSEMBLY Comment: SERIAL 03045260-09999999
17	53-857196	LOCK RING, PISTON PIN
18	39-78816A12	RING, PISTON

▶CYLINDER BLOCK AND CRANKCASE ASSEMBLY (47 parts)

Ref	OEM Part #	Part Name
1	1139-4453A1	END CAP ASSEMBLY, UPPER Comment: SERIAL 02973754-09999999
2	25-47254	"O" RING, UPPER END CAP
3	26-41953	OIL SEAL, UPPER END CAP
4	10-30225	SCREW, UPPER END CAP MOUNTING (1")
5	851-5883A2	CYLINDER BLOCK AND CRANKCASE ASSEMBLY
6	16-64936	STUD, CARBURETOR MOUNTING (1 3/16")
7	16-33111	STUD, CRANKCASE TO DRIVE SHAFT HOUSING (1 9/16")
8	17-57211	DOWEL PIN, RETAINER TO CYLINDER BLOCK
9	17-23784	DOWEL PIN, CRANKCASE TO CYLINDER BLOCK
10	17-20323	DOWEL PIN, CYLINDER BLOCK TO MAIN BEARING
11	27-55158	GASKET, SEALING - CYLINDER BLOCK
12	66517	RESTRICTION, CYLINDER BLOCK
13	16-8M0034463	STUD, CYLINDER BLOCK TO DRIVE SHAFT HOUSING (3 7/16")
14	16-29989	STUD, CYLINDER BLOCK TO DRIVE SHAFT HOUSING (1 15/16") - ST
15	16-34378	STUD, CYLINDER BLOCK TO DRIVE SHAFT HOUSING (2 5/16") - POR
16	10-69090	SCREW, CRANKCASE TO CYLINDER BLOCK (2 1/4")
17	11-29250	NUT, CRANKCASE FASTENING SCREW
18	55169A1	RETAINER ASSEMBLY, BALL BEARING Comment: PART OF CRANKSHAFT ASSEMBLY
19	30-63742T	BALL BEARING, RETAINER (CRANKSHAFT) - LOWER Comment: PART OF CRANKSHAFT ASSEMBLY
20	10-57846	SCREW, RETAINER TO CYLINDER BLOCK AND CRANKCASE (3/4")
21	12-58166	WASHER, RETAINER SCREW
22	26-57847	STAT-O-SEAL, RETAINER SCREW
23	26-41953	OIL SEAL, CYLINDER BLOCK (LOWER)
24	27-854891	GASKET, CYLINDER BLOCK TO BAFFLE PLATE
25	55190	PLATE, DIVIDER - EXHAUST MANIFOLD
26	27-854882	GASKET, BAFFLE PLATE TO EXHAUST COVER
27	551572	COVER, EXHAUST MANIFOLD
28	10-31984	SCREW, MANIFOLD COVER TO CYLINDER BLOCK (1 3/8")
29	10-24228	SCREW, ADJUSTING - EXHAUST COVER (1 7/8")
30	11-20890	NUT, ADJUSTING SCREW
31	26852	CAP, NYLON - ADJUSTING SCREW
32	58124A8	SWITCH ASSEMBLY, MERCURY
33	10-48409	SCREW, MERCURY SWITHCH TO EXHAUST COVER (5/8")
34	1024-91101	COVER, CYLINDER BLOCK
35	27-85490	GASKET, CYLINDER BLOCK COVER
36	10-56500	SCREW, CYLINDER BLOCK COVER MOUNTING (1 1/4")
37	11-8M0207775	NUT, COVER MOUNTING SCREW
38	46933A3	GROUND STRAP, POWERHEAD TO BOTTOM COWL
39	22-328022	PLUG, PIPE - CYLINDER BLOCK COVER Comment: ICH CONSISTS OF THE
40	21-55621A2	CONNECTOR ASS'Y, BLEED HOSE (LOWER) -SEE NOTE 1
41	21-42657A3	CHECK VALVE ASSEMBLY -SEE NOTE 1
42	32-9912688	HOSE, CYLINDER BLEED (16 1/2") -SEE NOTE 1
43	54-20387	CLAMP, BLEED HOSE -SEE NOTE 1
44	22-57785	CONNECTOR, BLEED HOSE (UPPER) -SEE NOTE 1
45	57752	COVER, TRANSFER PORT
46	27-552791	GASKET, TRANSFER PORT COVER
47	10-8M0214943	SCREW, TRANSFER PORT COVER MOUNTING

▶DRIVE SHAFT HOUSING ASSEMBLY (56 parts)

Ref	OEM Part #	Part Name
1	1564-4948A1	DRIVE SHAFT HOUSING ASSEMBLY (LONG SHAFT)
2	16-8M0022145	STUD, DRIVE SHAFT HOUSING TO GEAR HOUSING (1 3/4")
3	16-57935	STUD, DRIVE SHAFT HOUSING TO GEAR HOUSING (3")
4	19-824928001	PLUG, PLASTIC - WATER PICK-UP HOLE
5	12-45176	WASHER, DRIVE SHAFT HOUSING TO GEAR HOUSING STUDS
6	60769	COVER, TRIM - DRIVE SHAFT HOUSING
7	10-37571	SCREW, TRIM COVER TO DRIVE SHAFT HOUSING
8	39558	SEAL, TRIM COVER TO DRIVE SHAFT HOUSING
9	39557	STRIP, RETAINING - TRIM COVER SEAL
10	10-48408	SCREW, STRIP AND SEAL TO DRIVE SHAFT HOUSING (1/2")
11	12-30164	WASHER, RETAINING STRIP SCREW
12	32-45679	TUBE, WATER OUTLET (LONG SHAFT)
13	23-23651	SLEEVE, RUBBER - WATER OUTLET TUBE
14	695441	TUBE, EXHAUST (LONG SHAFT)
15	11-862902	NUT, POWERHEAD STUDS
16	46933A2	GROUND STRAP, BOTTOM COWL TO DRIVE SHAFT HOUSING
17	46933A2	SCREW, GROUND STRAP ATTACHING
18	27-385011	GASKET, EXHAUST PLATE TO DRIVE SHAFT HOUSING
19	25305	CAP, RUBBER - UPPER MOUNT BOLT NUT
20	11-23161	NUT, UPPER MOUNT BOLT
21	12-30519	WASHER, UPPER MOUNT BOLT (3/8 ID)
22	12-30521	WASHER, RUBBER - UPPER MOUNT BOLT
23	12-30520	WASHER, UPPER MOUNT BOLT (37/64 ID)
24	79680A1	COVER, UPPER MOUNT - OUTSIDE HALF
25	79680A1	COVER, UPPER MOUNT - INSIDE HALF
26	75301	MOUNT, RUBBER - UPPER
27	24929	PACKING, "U" CUP - UPPER MOUNT COVERS
28	10-37941	SCREW, UPPER MOUNT COVER - REAR (1 3/4")
29	10-49987	SCREW, UPPER MOUNT COVER - FRONT (1 1/2")
30	11-35888	NUT, UPPER MOUNT COVER FASTENING SCREW
31	25067	BUMPER, RUBBER - LOWER MOUNT SCREW
32	10-75284	SCREW, LOWER MOUNT (5 1/2")
33	12-28051	WASHER, LOWER MOUNT SCREW
34	12-28053	WASHER, RUBBER - LOWER MOUNT SCREW
35	75302T1	MOUNT, RUBBER - LOWER
36	12-30119	WASHER, LOWER MOUNT SCREW
37	11-25096	NUT, LOWER MOUNT SCREW
38	69592F1	CLAMP, LOWER MOUNT TO DRIVE SHAFT HOUSING
39	10-29256	SCREW, LOWER MOUNT CLAMP TO DRIVE SHAFT HOUSING (7/8")
40	24-35522	SPRING, TENSION - LOWER MOUNT CLAMP
41	35474T	COVER, LOWER MOUNT CLAMP
42	10-29722	SCREW, COVER TO LOWER CLAMP (5/8")
43	11-35521	NUT, LOWER MOUNT CLAMP COVER
44	11-8M0204653	NUT, GEAR HOUSING TO DRIVE SHAFT HOUSING STUDS
45	22-390721	PLUG, GREASE - REVERSE LOCK HOLE Comment: SERIAL 00000000-02979678
46	52920	LEVER, REVERSE LOCK Comment: SERIAL 00000000-02979678
47	17-24887	PIN, REVERSE LOCK LEVER Comment: SERIAL 00000000-02979678
48	24-25122	SPRING, TENSION - PUSH ROD Comment: SERIAL 00000000-02979678
49	45788	ROD, PUSH - REVERSE LOCK (LONG SHAFT) Comment: SERIAL 00000000-02979678
50	18-25191	COTTER PIN, PUSH ROD TO REVERSE LOCK Comment: SERIAL 00000000-02979678
51	52917	GUIDE, PUSH ROD SERIAL #3043031 AND UP Comment: SERIAL 03043031-09999999
52	59720	ROD, PUSH - REVERSE LOCK (LONG SHAFT) Comment: SERIAL 03043031-09999999
53	11-60049	NUT, JAM - PUSH ROD Comment: SERIAL 03043031-09999999
54	59722	ROD END, PUSH ROD Comment: SERIAL 03043031-09999999
55	17-72524	PIN, REVERSE LOCK LEVER Comment: SERIAL 03043031-09999999
56	18-25191	COTTER PIN, PUSH ROD TO REVERSE LOCK Comment: SERIAL 03043031-09999999

▶FLYWHEEL, IGNITION COIL AND SWITCH BOX (43 parts)

Ref	OEM Part #	Part Name
1	11-8M0214915	NUT, FLYWHEEL
2	12-36281	WASHER, FLYWHEEL NUT
3	25-37340	"O" RING, FLYWHEEL HUB
4	28-45554	KEY, FLYWHEEL DRIVE
5	235-3877A2	FLYWHEEL ASSEMBLY
6	10-35563	SCREW, FLEXIBLE PLATE TO FLYWHEEL (9/16")
7	50-39838	RATCHET, FLYWHEEL
8	10-32417	SCREW, RATCHET TO FLYWHEEL (5/8")
9	13-26992	LOCKWASHER, RATCHET SCREW
10	10-55181	SCREW, MAGNET HOLDER TO FLYWHEEL (1 1/8")
11	398-4424	STATOR, ALTERNATOR (ELECTRIC)
12	10-56787	SCREW, STATOR TO UPPER END CAP (2")
13	13-58308	LOCKWASHER, STATOR SCREW
14	13-30809	WASHER, WAVE - DISTRIBUTOR ROTOR
15	393-4665	ROTOR, DISTRIBUTOR
16	393-4560	BODY, DISTRIBUTOR
17	22-996642	ELBOW, VENT HOSE TO DISTRIBUTOR BODY
18	32-8M0108355	HOSE, VENT - DISTRIBUTOR (16 1/2")
19	22-31521	ELBOW, VENT HOSE TO BOTTOM COWL
20	54-22875	CLAMP, VENT HOSE
21	10-62568	SCREW, VENT HOSE CLAMP ATTACHING
22	8M0084613	"D" WASHER, VENT HOSE CLAMP SCREW
23	84-813715A1	LEAD ASSEMBLY, SPARK PLUG (HIGH TENSION)
24	33-61976	SPARK PLUG (AC #M-40FF)-SEE NOTE BELOW
25	85-63709A1	PROTECTOR ASSEMBLY, SPARK PLUG
26	85-94589	BOOT, SPARK PLUG LEAD
27	25-56474	INSULATOR, SPARK PLUG LEAD
28	54-47483	CLAMP, SPARK PLUG LEAD ATTACHING
29	393-3295A2	LEAD ASSEMBLY, IGNITION COIL
30	332-2854T01	BOOT, LEAD TO IGNITION COIL
31	54-22627	CLAMP, IGNITION COIL LEAD ATTACHING
32	10-62568	SCREW, IGNITION COIL LEAD CLAMP
33	8M0084613	"D" WASHER, ATTACHING CLAMP SCREW
34	332-4172A4	SWITCH BOX ASSEMBLY, COMPLETE
35	10-55650	SCREW, SWITCH BOX TO FRONT SUPPORT BRACKET (1")
36	10-45218	SCREW, GROUND WIRE TO SWITCH BOX (3/8")
37	12-45075	WASHER, SWITCH BOX TERMINAL
38	11-45076	NUT, SWITCH BOX TERMINAL
39	336-4592A2	IGNITION COIL ASSEMBLY, COMPLETE
40	10-64278	SCREW, IGNITION COIL TO FRONT SUPPORT BRACKET (1")
41	11-8M0207775	NUT, IGNITION COIL SCREW
42	84-93388A14	GROUND WIRE, CRANKCASE TO FRONT SUPPORT BRACKET
43	60172	RESTRICTOR, VENT HOSE

▶FUEL PUMP ASSEMBLY AND FUEL LINES (20 parts)

Ref	OEM Part #	Part Name
1	55156A5	FUEL PUMP ASSEMBLY
2	21-30430A3	CHECK VALVE ASSEMBLY
3	55278A1	DIAPHRAGM KIT
6	23004	RETAINER, CHECK VALVE
7	10-43725	SCREW, RETAINER TO HOUSING
8	10-69067	SCREW, FUEL PUMP MOUNTING (1 3/8")
9	22-328022	PLUG, PIPE - FUEL PUMP
10	32-55828A1	FUEL LINE, FUEL PUMP TO CARBURETOR (13 3/4")
11	22-8M0123050	FITTING, FUEL LINE TO CARBURETOR (45 )
12	22-30174	ELBOW, PUMP INLET TO FUEL LINE (90 )
13	22-30175	SLEEVE, RUBBER - ELBOW
14	22-30177	NUT, ELBOW TO FUEL LINE
15	32-56367	FUEL LINE, FUEL PUMP TO ADAPTOR
16	22833	ADAPTOR, CHECK UNIT (FUEL PUMP)
17	23069	STEM, CHECK UNIT ADAPTOR
18	25-16524	"O" RING, ADAPTOR STEM
19	24-23067T	SPRING, ADAPTOR STEM
20	30188	CUP WASHER, ADAPTOR
21	10-56500	SCREW, ADAPTOR TO BOTTOM COWL (1 1/4")
22	11-8M0207775	NUT, ADAPTOR SCREW

▶GEAR HOUSING ASSEMBLY, COMPLETE (PAGE 1) (48 parts)

Ref	OEM Part #	Part Name
-	1626-3927A5	GEAR HOUSING ASSEMBLY, COMPLETE (LONG SHAFT)SEE NOTE BELOW Comment: SERIAL 03043031-09999999
1	1626-3927A6	GEAR HOUSING ASSEMBLY Comment: SERIAL 03043031-09999999
3	17-21438	PIN, DOWEL - GEAR HOUSING
4	16-57934	STUD, WATER PUMP BODY AND BSE TO GEAR HOUSING
5	16-8M0034453	STUD, GEAR HOUSING TO DRIVE SHAFT HOUSING
6	31-62091T	BEARING, ROLLER - DRIVE SHAFT
7	92815	PLATE, SUPPORT - EXHAUST TUBE
8	37721001	SEAL, EXHAUST TUBE
9	43-55607	GEAR, PINION - DRIVE SHAFT
10	11-55910	NUT, PINION GEAR TO DRIVE SHAFT
11	27-32771	GASKET, WATER PUMP BASE TO GEAR HOUSING
12	25-26855	"O" RING, WATER PUMP BASE
13	46-77516A1	WATER PUMP BASE ASSEMBLY
14	26-79831	OIL SEAL, WATER PUMP BASE
15	26-90562	OIL SEAL, WATER PUMP BASE
16	17-35973	DOWEL PIN, WATER PUMP BASE TO WATER PUMP BODY
17	27-19553	GASKET, LOWER - WATE PUMP BASE TO FACE PLATE
18	32768	PLATE, FACE - WATER PUMP BASE TO WATER PUMP BODY Comment: SERIAL 03043031-09999999
19	27-19551	GASKET, UPPER - FACE PLATE TO WATER PUMP BODY
20	47-89983T	IMPELLER, WATER PUMP
21	28-8M0032837	KEY, IMPELLER DRIVE
22	46-77822A1	WATER PUMP BODY ASSEMBLY
23	48753	INSERT, WATER PUMP BODY
24	26-32121	OIL SEAL, WATER PUMP BODY
25	12-8M0204649	WASHER, WATER PUMP BODY AND BASE STUDS
26	11-826709109	NUT, WATER PUMP BODY AND BASE STUDS
27	26-38452	SEAL, RUBBER - WATER INLET TUBE (WATER PUMP BODY)
28	12-38453	WASHER, NYLON - WATER PUMP BODY
29	25-20273	RING, RUBBER - CENTRIFUGAL SLINGER (DRIVE SHAFT)
30	25-29619	"O" RING, UPPER - DRIVE SHAFT
31	10-79953Q04	SCREW, GREASE FILLER AND VENT HOLE
32	12-191833	WASHER, GREASE FILLER AND VENT HOLE SCREW
33	19-48750	PLUG, GEAR HOUSING FLUSHING HOLE
34	12-8M0204663	WASHER, GEAR HOUSING FLUSHING HOLE
35	55420A1	SHAFT ASSEMBLY, SHIFT - LOWER Comment: SERIAL 03043031-09999999
36	53-29641	CLIP, RETAINING - SHIFT SHAFT
37	25-25439	"O" RING, SHIFT SHAFT BUSHING
38	23-77631A2	BUSHING ASSEMBLY, SHIFT SHAFT Comment: SERIAL 03043031-09999999
39	26-24590	OIL SEAL, SHIFT SHAFT BUSHING (LOWER) Comment: SERIAL 03043031-09999999
40	12-31266	WASHER, RUBBER - SHIFT SHAFT BUSHING Comment: SERIAL 03043031-09999999
41	43308T1	CAM, REVERSE LOCKING Comment: SERIAL 03043031-09999999
42	78036	BASE, REVERSE LOCKING Comment: SERIAL 03043031-09999999
43	45-57359A1	DRIVE SHAFT ASSEMBLY (LONG SHAFT)
44	24-20254	SPRING, COMPRESSION - DRIVE SHAFT
45	17-30545	PIN, DRIVE SHAFT
46	23-52709	SLEEVE, LUBRICATION - DRIVE SHAFT
47	15-20929A1	SHIM, BEARING TO GEAR HOUSING (.002-3-5-10)
48	31-38146A1	ROLLER BEARING ASSEMBLY, TAPERED - DRIVE SHAFT-SEE NOTE BE

▶GEAR HOUSING ASSEMBLY, COMPLETE (PAGE 2) (35 parts)

Ref	OEM Part #	Part Name
-	1626-3927A5	GEAR HOUSING ASSEMBLY, COMPLETE (LONG SHAFT) Comment: -SEE NOTE BELOW SERIAL 03043031-09999999
1	1626-3927A6	GEAR HOUSING ASSEMBLY Comment: SEE PAGE 27 FOR BREAKDOWN SERIAL 03043031-09999999
49	760394	CAM, SHIFT
50	38441	FOLLOWER, CAM
51	20843	SLIDE, CROSS PIN
52	24-39845	SPRING, COMPRESSION - CAM FOLLOWER
53	15-38374A1	SHIM, BEARING CUP TO GEAR HOUSING (.002-3-4-10)
54	31-38356A1	TAPERED ROLLER BEARING ASSEMBLY
55	31-21739	BEARING, ROLLER - FORWARD GEAR
56	43-55608T4	FORWARD GEAR ASSEMBLY
57	52-92911T	RATCHET, SLIDING CLUTCH
58	17-8M0020942	PIN, CROSS - RATCHET TO PROPELLER SHAFT
59	24-38114	SPRING, RETAINING - CROSS PIN
60	44-75365	SHAFT, PROPELLER
61	43-79158T	REVERSE GEAR ASSEMBLY
62	15-20927A1	SHIM, THRUST WASHER TO GEAR HOUSING (.002-3-5-10)
63	12-32004	WASHER, THRUST - REVERSE GEAR
64	30-20839T	BEARING, BALL - REVERSE GEAR
65	25-31986	"O" RING, BEARING CARRIER
66	69386T1	BEARING CARRIER ASSEMBLY
67	31-21700	BEARING, ROLLER - BEARING CARRIER
68	26-56788	OIL SEAL, BEARING CARRIER
69	28-30281	KEY, LOCATING - BEARING CARRIER
70	14-53012	TAB WASHER, GEAR HOUSING COVER
71	11-87763	COVER, GEAR HOUSING
72	97-31640Q4	TRIM TAB ASSEMBLY, GEAR HOUSING
73	10-66024	SCREW, TRIM TAB TO GEAR HOUSING
74	55908A1	THRUST HUB AND WASHER ASSEMBLY
75	12-31992	WASHER, CUPPED - THRUST HUB
76	12-55907	WASHER, SPLINED - PROPELLER SHAFT
77	11-82671120	NUT, PROPELLER
78	12-45176	WASHER, DRIVE SHAFT HOUSING TO GEAR HOUSING STUD (7/16")
79	11-8M0204653	NUT, DRIVE SHAFT HOUSING TO GEAR HOUSING STUD (7/16")
80	12-8M0214963	WASHER, DRIVE SHAFT HOUSING TO GEAR HOUSING STUD (3/8")
81	11-8M0204726	NUT, DRIVE SHAFT HOUSING TO GEAR HOUSING STUD (3/8")

▶MISCELLANEOUS PARTS/ACCESSORIES (1 parts)

Ref	OEM Part #	Part Name
-	50-55601A1	ELECTRIC STARTER KIT

▶SHIFT CONTROL LINKAGE (20 parts)

Ref	OEM Part #	Part Name
1	87876A1	BRACKET, SHIFT ANCHOR - UPPER
2	10-815549	SCREW, ANCHOR BRACKET TO CYLINDER BLOCK (2")
3	10-69096	SCREW, UPPER ANCHOR BRACKET TO CRANKCASE (1 3/4")
4	11-29250	NUT, UPPER ANCHOR BRACKET SCREW
5	87874	SLIDE, SHIFT ACTUATING
6	56193	LATCH, SHIFT ACTUATING SLIDE (SHIFT CABLE)
7	10-39620	SCREW, LATCH TO SHIFT ACTUATING SLIDE
8	24-27087	SPRING, COMPRESSION - LATCH SCREW
9	39516	SLIDE, NYLON - ANCHOR BRACKET (SHIFT ACTUATING SLIDE)
10	39515	END CAP, NYLON - ANCHOR BRACKET SLIDE
11	87876A1	BRACKET, SHIFT ANCHOR - LOWER
12	10-20012	SCREW, UPPER ANCHOR BRACKET TO LOWER ANCHOR BRACKET (1 5/8")
13	11-826709109	NUT, UPPER ANCHOR BRACKET SCREW
14	59110A1	SHIFT SHAFT ASSEMBLY, UPPER (LONG SHAFT) Comment: SERIAL 02973754-09999999
15	93960A1	COUPLING, UPPER SHIFT SHAFT
16	39519	CUP, RETAINER - ANCHOR BRACKET (SHIFT CABLE BARREL)
17	87609A1	LEVER, NYLON - SHIFT CABLE LOCKING (UPPER ANCHOR BRACKET)
18	17-47175	PIN, LOCKING LEVER AND COVER FASTENING
19	39667	COVER, NYLON - SHIFT CABLE
20	39536	LINK, LOCKING LEVER TO COVER

▶STARTER MOTOR, RECTIFIER AND WIRING HARNESS (43 parts)

Ref	OEM Part #	Part Name
--	52907	INSULATOR, SUPPORT TO BOTTOM COWL
1	57580A1	RECTIFIER ASSEMBLY
2	10-76621	SCREW, RECTIFIER TO BOTTOM COWL (7/8")
3	13-22773	LOCKWASHER, RECTIFIER SCREW
4	10,13-26996	LOCKWASHER, RECTIFIER TERMINAL
5	11-45076	NUT, RECTIFIER TERMINAL (10-32)
6	89-889274	CHOKE SOLENOID ASSEMBLY
7	10-26065	SCREW, CHOKE SOLENOID TO FRONT SUPPORT BRACKET (1")
8	11-29250	NUT, CHOKE SOLENOID SCREW
9	13-26996	LOCKWASHER, CHOKE SOLENOID TERMINAL
10	11-45076	NUT, CHOKE SOLENOID TERMINAL
11	89008A2	PLUNGER ASSEMBLY, CHOKE SOLENOID
12	19-35827	PLUG, BOTTOM COWL
13	11-30428	FASTENER, PLUG TO BOTTOM COWL
14	34228	SUPPORT, EXTERNAL WIRING HARNESS
15	10-31163	SCREW, SUPPORT TO BOTTOM COWL
16	11-8M0207775	NUT, SUPPORT FASTENING SCREW
17	10-98256	SCREW, WIRING HARNESS GROUND TO BOTTOM COWL (1/2")
18	13-24669	LOCKWASHER, WIRING HARNESS GROUND SCREW
19	56370	WIRING HARNESS (INTERNAL)
20	54-76368	CLAMP, WIRING HARNESS ATTACHING
21	10-20189	SCREW, WIRING HARNESS CLAMP TO BOTTOM COWL (3/4")
22	24-28975	SPRING, GARTER - INTERNAL WIRING HARNESS
23	61990	STA-STRAP, WIRING HARNESS
24	54-22740	CLAMP, WIRING HARNESS (3/8")
25	10-62568	SCREW. WIRING HARNESS CLAMP ATTACHING
26	8M0084613	"D" WASHER, WIRING HARNESS CLAMP SCREW
27	50-55601A2	STARTER MOTOR ASSEMBLY
28	10-35213	SCREW, STARTER MOTOR TO CRANKCASE (1 5/8")
29	13-26992	LOCKWASHER, CABLE TO STARTER MOTOR NUT
30	11-20890	NUT, CABLE TO STARTER MOTOR
31	84-93389A3	CABLE, STARTER MOTOR TO STARTER SOLENOID
32	10-69035	SCREW, GROUND WIRE TO STARTER MOTOR (5/8")
33	13-26992	LOCKWASHER, GROUND WIRE FASTENING SCREW
34	25661T1	SOLENOID, STARTER
35	10-69028	SCREW, STARTER SOLENOID TO FRONT SUPPORT BRACKET (3/8")
36	13-26992	WASHER, STARTER SOLENOID SCREW
37	10,13-26996	LOCKWASHER, STARTER SOLENOID TERMINAL
38	10,11-68219	NUT, STARTER SOLENOID TERMINAL
39	38938	BOOT, RUBBER - STARTER SOLENOID TERMINAL (SMALL)
40	13-8M0204647	LOCKWASHER, STARTER SOLENOID TERMINAL (5/16)
41	11-22053	NUT, STARTER SOLENOID TERMINAL (5/16)
42	46265	BOOT, RUBBER - STARTER SOLENOID TERMINAL (LARGE)

▶THROTTLE CONTROL LINKAGE AND SPARK ADVANCE (56 parts)

Ref	OEM Part #	Part Name
--	15-60821	SHIM, TRIGGER COIL
1	39521	SHAFT, THROTTLE CONTROL
2	57784A1	THROTTLE ACTUATOR ASSEMBLY
3	23-26602	BUSHING, NYLON - THROTTLE CONTROL SHAFT
4	10-69022	SCREW, THROTTLE ACTUATOR TO THROTTLE CONTROL SHAFT
5	13-26996	LOCKWASHER, THROTTLE ACTUATOR SCREW
6	12-847883	WASHER, THROTTLE ACTUATOR SCREW
7	23-39524	BUSHING, NYLON - THROTTLE CONTROL SHAFT
8	39522T	BRACKET, THROTTLE CONTOL SHAFT
9	10-24228	SCREW, ADJUSTING - THROTTLE CONTROL BRACKET (1 7/8")
10	11-20890	NUT, JAM - ADJUSTING SCREW
11	26852	CAP, NYLON - ADJUSTING SCREW
12	10-20639	SCREW, THROTTLE CONTROL BRACKET (1 1/8")
13	11-29250	NUT, THROTTLE CONTOL BRACKET SCREW
14	55167	CAP, THROTTLE
15	10-34353	SCREW, THROTTLE CAP TO THROTTLE CONTROL SHAFT (1")
16	13-35048	LOCKWASHER, THROTTLE CAP SCREW
17	57440	SWIVEL, LINKAGE - THROTTLE CONTROL SHAFT
18	25996A1	SWIVEL LINK ROD ASSEMBLY
19	11-25168	NUT, JAM - UPPER LINK ROD ADJUSTING
20	55160	ROD, LINK - UPPER
21	57440	SWIVEL, UPPER LINK ROD TO THROTTLE CONTROL LEVER
22	55187	LEVER, THROTTLE CONTROL
23	10-818165	SCREW, THROTTLE CONTROL LEVER TO CYLINDER BLOCK (1 3/4")
24	23-55164	BUSHING, THROTTLE CONTROL LEVER SCREW
25	23-55171	BUSHING, THROTTLE CONTROL LEVER SCREW
26	24-55162	SPRING, RETURN - SPARK ADVANCE LEVER
27	55188	LEVER, SPARK ADVANCE
28	12-68410	WASHER, THROTTLE CONTOL LEVER SCREW
29	39483	LATCH, THROTTLE CONTROL LEVER (THROTTLE CABLE)
30	10-69026	SCREW, LATCH TO THROTTLE CONTROL LEVER (7/8")
31	24-20099	SPRING, COMPRESSION - LATCH SCREW
32	11-826709109	NUT, LATCH SCREW
33	58391	BALL JOINT, SPARK ADVANCE LEVER Comment: SERIAL 03043031-09999999
34	11-30506	NUT, BALL JOINT TO SPARK ADVANCE LEVER
35	11-25168	NUT, JAM - LINK ROD ADJUSTING
36	55159	LINK ROD
37	60826	SWIVEL, LINK ROD TO POSITIONING PLATE Comment: SERIAL 03122534-09999999
38	13-29720	WAVE WASHER, LINK ROD SWIVEL
39	12-20583	WASHER, LINK ROD SWIVEL
40	18-210711	COTTER PIN, LINK ROD SWIVEL
41	24-60820A1	SPRING, SPARK ADVANCE Comment: SERIAL 00000000-02979678
41 AND	24-60820A1	SPRING ASSEMBLY, SPARK ADVANCE Comment: SERIAL 03122534-09999999
42	24-60820A1	PIN, TRIGGER COIL RETAINING Comment: SERIAL 00000000-02979678
43	55166	PLATE, POSITIONING - TRIGGER COIL
44	53-21058	RING, SNAP - TRIGGER COIL RETAINING PIN
45	15-55324A1	SHIM ASSEMBLY, POSITIONING PLATE
46	55305	PLATE, WEAR - POSITIONING PLATE
47	55296	PLATE, SPARK ADVANCE
48	10-55336	SCREW, SPARK ADVANCE PLATE TO STARTER HOUSING (5/8")
49	12-8M0204649	WASHER, SPARK ADVANCE PLATE SCREW
50	15-55172A1	SHIM ASSEMBLY, SPARK ADVANCE PLATE
51	332-4608A2	TRIGGER COIL ASSEMBLY Comment: SERIAL 03122534-09999999
52	54-24836	CLAMP, TRIGGER COIL LEAD
53	10-62568	SCREW, TRIGGER COIL LEAD TO STARTER HOUSING
54	8M0084613	"D" WASHER, TRIGGER COIL LEAD SCREW

▶TOP COWL, SUPPORT BRACKETS AND STARTER ASSEMBLY (75 parts)

Ref	OEM Part #	Part Name
1	2138-4413A2	TOP COWL ASSEMBLY Comment: SERIAL 03043031-09999999
2	58657	INSERT, ROPE GUIDE - TOP COWL Comment: SERIAL 03043031-09999999
3	53-72168	RING, RETAINING - ROPE GUIDE INSERT Comment: SERIAL 03043031-09999999
4	16-21391	STUD, TOP COWL TO SUPPORT BRACKET - REAR (1 1/2") Comment: SERIAL 03043031-09999999
5	16-21553	STUD, TOP COWL TO SUPPORT BRACKET - FRONT (1 1/2") Comment: SERIAL 03043031-09999999
6	11-82670911	NUT, TOP COWL STUD
7	39609	SHIELD, REAR - TOP COWL
8	10-38055	SCREW, REAR SHIELD TO TOP COWL (5/8")
9	12-26014	WASHER, REAR SHIELD SCREW
10	39619	BUTTON, FRONT COVER RELEASE - TOP COWL
11	24-37911	SPRING, COMPRESSION - FRONT COVER RELEASE BUTTON
12	60865	CATCH, FRONT COVER - TOP COWL
13	10-69011	SCREW, FRONT COVER CATCH TO TOP COWL (7/8")
14	13-26996	LOCKWASHER, FRONT COVER CATCH SCREW
15	14-20165	TAB WASHER, SHEAVE SHAFT NUT
16	11-20166	NUT, SHEAVE SHAFT (LEFT HAND THREAD)
17	25-39597	GROMMET, STARTER HOUSING
18	70970	CABLE ASSEMBLY, INTERLOCK
19	10-32228	SCREW, INTERLOCK CABLE TO EXHAUST PLATE (5/8")
20	10-69022	SCREW, INTERLOCK CABLE TO STARTER HOUSING (1/2")
21	13-27660	LOCKWASHER, INTERLOCK CABLE SCREW
22	12-26013	WASHER, INTERLOCK CABLE SCREW
23	57236	CAM, SLIDING - STARTER HOUSING
24	24-70086	SPRING, SLIDING CAM
25	12-37998	WASHER, INTERLOCK CABLE
26	18-26953	COTTER PIN, INTERLOCK CABLE TO SLIDING CAM
27	65757A1	TOGGLE, STARTER INTERLOCK
28	10-57249	SCREW, TOGGLE TO STARTER HOUSING
29	23-26856	BUSHING, TOGGLE SCREW
30	24-57279	SPRING, TOGGLE SCREW
31	55860	PULLEY, STARTER CABLE
32	10-45210	SCREW, PULLEY TO STARTER HOUSING (1 1/4")
33	12-22887	WASHER, PULLEY SCREW
34	23-309772	SPACER, PULLEY SCREW
35	11-24656	NUT, PULLEY SCREW
36	76079A8	HOUSING, STARTER
37	10-37562	SCREW, HOUSING TO CRANKCASE (1")
38	13-8M0204647	LOCKWASHER, STARTER HOUSING SCREW
39	60825	BRACKET, LIMIT STOP - REAR Comment: SERIAL 03122534-09999999
40	10-20639	SCREW, LIMIT STOP BRACKET TO CYLINDER BLOCK (1 1/8")
41	11-29250	NUT, LIMIT STOP BRACKET SCREW
42	10-26065	SCREW, STARTER HOUSING TO LIMIT STOP BRACKET - REAR (1")
43	11-826709111	NUT, STARTER HOUSING SCREW
44	25-39597	GROMMET, LIMIT STOP BRACKET
45	10-37562	SCREW, LIMIT STOP BRACKET TO CYLINDER BLOCK (1")
46	13-8M0204647	LOCKWASHER, LIMIT STOP BRACKET SCREW
47	39835	RETAINER, STARTER REWIND
48	24-39502T02	SPRING, STARTER REWIND
49	23-28912	BUSHING, SPRING GUIDE
50	76053A1	STARTER SHEAVE ASSEMBLY
51	30596	PAWL, STARTER
52	13-36206	WASHER, WAVE - STARTER PAWL
53	23-28919	BUSHING, NYLON - SHEAVE SHAFT SPACER
54	23-61005	SPACER, SHEAVE SHAFT
55	39840	RETAINER, WAVE WASHER
56	12-57837	WASHER, WAVE WASHER RETAINER
57	13-20160	WASHER, WAVE - RETAINER TENSION
58	66845	PLATE, RETAINER - STARTER PAWL
59	24-26068	SPRING, RETAINER PLATE TO STARTER SHEAVE
60	45477A1	SHAFT, SHEAVE
61	39173	BRACKET, SUPPORT - TOP COWL (REAR)
62	90435	MOUNT, RUBBER - REAR SUPPORT BRACKET
63	11-8267089	NUT, RUBBER MOUNT OT CYLINDER BLOCK COVER (LOWER)
64	11-826709109	NUT, RUBBER MOUNT OT REAR SUPPORT BRACKET (UPPER)
65	10-37562	SCREW, REAR SUPPORT BRACKET TO BOTTOM COWL (1")
66	13-8M0204647	LOCKWASHER, REAR SUPPORT BRACKET SCREW
67	67323	BRACKET, SUPPORT - TOP COWL (FRONT)
68	10-37562	SCREW, FRONT SUPPORT BRACKET TO BOTTOM COWL (1")
69	13-8M0204647	LOCKWASHER, FRONT SUPPORT BRACKET SCREW
70	90435	MOUNT, RUBBER - FRONT SUPPORT BRACKET
71	11-8267089	NUT, RUBBER MOUNT TO CRANKCASE (LOWER)
72	11-826709109	NUT, RUBBER MOUNT TO FRONT SUPPORT BRACKET (UPPER)
73	50-12066Q10	STARTER CABLE ASSEMBLY
74	30782	HANDLE, STARTER CABLE
75	79470A1	RETAINER, STARTER CABLE AND HANDLE

100-Hour / Annual Service Checklist

Regular maintenance keeps your Mercury 400 (2 CYL.) 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.

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Mercury 400 (2 CYL.) (2874704 THRU 3336257) Parts & Diagrams

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