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Mercury 500 (1755549 THRU 2097444) Parts & Diagrams

🔎 Mercury 500 Reference Library — Exploded parts diagrams (18 diagrams), specifications, common issues, and maintenance checklist.

The Mercury 500 is a 4-Stroke, Inline 4-Cylinder, EFI, SOHC outboard motor. Commonly used on jon boats, pontoons, and mid-size utility craft.

Quick Reference Specifications

Specification	Value
Engine Type	4-Stroke, Inline 4-Cylinder, EFI, SOHC
Horsepower	50 HP
Displacement	995 cc
Bore x Stroke	65 mm x 75 mm
Spark Plug (Type & Gap)	NGK IZFR6F-11
Engine Oil Capacity	3.0 L (3.17 quart)
Recommended Engine Oil	SAE 25W-40 Mercury FourStroke Oil
Gear Case Oil Capacity	440 mL (14.9 fl oz)
Idle Speed (in gear)	650 ± 50 RPM (in gear)
Full Throttle RPM Range	5000-6000
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 500:

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 500.

▶ACCESSORIES (0 parts)

▶BOTTOM COWL ASSEMBLY AND SHIFT LINKAGE (68 parts)

Ref	OEM Part #	Part Name
1	2116-2990A1	BOTTOM COWL ASSEMBLY
2	29206	COVER, PLUG - BOTTOM COWL HARNESS HOLE
3	10-45893	SCREW, PLUG COVER TO BOTTOM COWL
4	13-26995	LOCKWASHER, PLUG COVER SCREW ( REMOVE - NOT REQUIRED ON ELE
5	11-26419	NUT, PLUG COVER SCREW
6	16-68169	STUD, BOTTOM COWL TO REAR SUPPORT BRACKET
7	11-8267089	NUT, BOTTOM COWL STUD
8	37703A1	TRIM MOULDING ASSEMBLY, BOTTOM COWL
9	38046	SPLICER, TRIM MOULDING - REAR
10	10-29226	SCREW, DECORATIVE - TRIM MOULDING TO BOTTOM COWL
11	12-24671	WASHER, FIBER - MOULDING SCREW
12	11-29225	NUT, NYLON CAP - MOULDING SCREW
13	13-26995	LOCKWASHER, MOULDING SCREW
14	11-26419	NUT, MOULDING SCREW
15	32-8M0108355	TUBE, VENT - MAGNETO OUTLET (12 5/8")
16	22-31521	ELBOW, MAGNETO VENT TUBE TO BOTTOM COWL
17	21104A2	CONNECTOR BASE ASSEMBLY
18	13-21972	LOCKWASHER, CONNECTOR BASE
19	11-21971	NUT, CONNECTOR BASE TO BOTTOM COWL
20	54-25231	CLIP, CONNECTOR BASE LEAD WIRE
21	10-22815	SCREW, LEAD WIRE CLIP TO BOTTOM COWL
22	60948A1	COVER PLATE ASSEMBLY
23	37944	PAD, SOUND - COVER PLATE
24	10-8M0113176	SCREW, COVER PLATE TO BOTTOM COWL
25	37695	BOOT, CONTROL CABLE
26	23760	BAFFLE, BOTTOM COWL
27	10-21106	SCREW, BAFFLE TO BOTTOM COWL
28	37637	BOOT, FUEL CONNECTOR
29	37692	SUPPORT, EXTERNAL WIRING HANRESS
30	10-21937	SCREW, HARNESS SUPPORT TO BOTTOM COWL (2")
31	11-8M0207775	NUT, HARNESS SUPPORT SCREW
32	32-8M0108355	HOSE, WATER TELL TALE - CYLINDER BLOCK TO BOTTOM COWL
33	22-291112	CONNECTOR, WATER TELL TALE HOSE - BOTTOM COWL
34	54-22976	CLAMP, WATER TELL TALE HOSE TO CONNECTOR
35	42819A2	PLATE ASSEMBLY, EXHAUST EXTENSION
36	12-38453	WASHER, NYLON - WATER INLET TUBE STARTER WITH SERIAL #181 Comment: SERIAL 01811269-09999999
37	26-20232	SEAL, RUBBER - EXHAUST EXTENSION PLATE (USE THRU SERIAL #18 Comment: SERIAL 00000000-01811268
38	38500	RETAINER, WATER TUBE SEAL STARTED WITH SERIAL #1811269 Comment: SERIAL 01811269-09999999
39	10-69069	SCREW, RETAINER TO EXHAUST EXTENSION PLATE Comment: SERIAL 01811269-09999999
40	10-56500	SCREW, EXHAUST EXTENSION PLATE TO DRIVE SHAFT HOUSING Comment: SERIAL 01811269-09999999
41	11-8M0207775	NUT, EXHAUST EXTENSION PLATE SCREW
42	59037A2	LEVER, QUICK DISCONNECT - THROTTLE AND SHIFT CABLES
43	24-38005	SPRING, COMPRESSION - QUICK DISCONNECT LEVER
44	23-37927	BEARING, NYLON - QUICK DISCONNECT LEVER
45	17-239281	PIN, ROLL - QUICK DISCONNECT LEVER
46	37926	RETAINER, NYLON BEARING TO EXHAUST EXTENSION PLATE
47	10-37923	SCREW, BEARING RETAINER TO EXHAUST EXTENSION PLATE
48	27-796501	GASKET, POWERHEAD TO EXHAUST EXTENSION PLATE
49	38156	SEAL, RUBBER - EXHAUST EXTENSION PLATE
50	99136	STRIP, RUBBER SEAL RETAINING
51	10-37571	SCREW, RETAINING STRIP TO EXHAUST EXTENSION PLATE
52	27-385011	GASKET, EXHAUST EXTENSION PLATE TO DRIVE SHAFT HOUSING
53	25162A1	SHIFT SHAFT ASSEMBLY, UPPER (LONG SHAFT)
54	24-37693	SPRING, DETENT - SHIFT SHAFT
55	10-98256	SCREW, DETENT SPRING TO EXHAUST EXTENSION PLATE
56	12-69057	WASHER, DETENT SPRING SCREW
57	11-8M0207775	NUT, DETENT SPRING SCREW
58	37948A5	ACTUATOR, SHIFT CONTROL
59	12-26907	WASHER, SHIFT CONTROL ACTUATOR
60	11-8267089	NUT, SHIFT CONTROL ACTUATOR TO UPPER SHIFT SHAFT
61	24-37934	SPRING, QUICK DISCONNECT - SHIFT CABLE
62	10-38069	SCREW, QUICK DISCONNECT SPRING TO SHIFT CONTROL ACTUATOR
63	37932	BEARING, NYLON - SHIFT CONTROL ACTUATOR
64	10-36137	SCREW, BEARING TO SHIFT CONTROL ACTUATOR
65	13-21272	LOCKWASHER, BEARING SCREW
66	37935	RAIL, SHIFT CONTROL BEARING
67	10-69028	SCREW, RAIL TO EXHAUST MANIFOLD COVER
68	13-26992	LOCKWASHER, RAIL SCREW

▶CARBURETOR ASSEMBLY (38 parts)

Ref	OEM Part #	Part Name
--	1395-92621	REPAIR PARTS KIT (1 PER CARBURETOR)
1	1333-2741	CARBURETOR ASSEMBLY, COMPLETE (KA-21B)
2	1395-8673	FLOAT ASSEMBLY
3	17-20853	PIN, FLOAT LEVER PINION
4	1399-102	LEVER, FLOAT (LOWER)
5	1399-101	LEVER, FLOAT (UPPER)
6	1395-92581	INLET NEEDLE, SEAT AND GASKET
7	27-25033	GASKET, INLET SEAT
8	1399-99	GASKET, FLOAT BOWL COVER
9	1399-1133	COVER, FLOAT BOWL
10	10-22625	SCREW, FLOAT BOWL COVER (SHORT)
11	10-25850	SCREW, FLOAT BOWL COVER (LONG)
12	27-25851	GASKET, STRAINER COVER (LARGE)
13	1399-3938	SCREEN, FILTER
14	27-25849	GASKET, STRAINER COVER (SMALL)
15	1399-1135	COVER, STRAINER
16	27-25848	GASKET, STRAINER COVER SCREW
17	10-25822	SCREW, STRAINER COVER FASTENING
18	1395-6027	SCREW, THROTTLE STOP LEVER
19	8146791	LEVER, THROTTLE STOP (SEE NOTE BELOW)
20	1399-2012	SHAFT, THROTTLE
21	1399-2560	TUBE, IDLE
22	27-23180	GASKET, IDLE TUBE
23	10-20858	SCREW AND LOCKWASHER, THROTTLE SHUTTER
24	1399-1476	SHUTTER, THROTTLE
25	24-27160	SPRING, IDLE ADJUSTMENT SCREW
26	1399-1713	SCREW, IDLE ADJUSTMENT
27	10-28405	SCREW, PLUG - MAIN FUEL JET CHANNEL
28	27-28406	GASKET, JET CHANNEL PLUG SCREW
29	1399-1655	JET, MAIN FUEL (.055)
30	27-28409	GASKET, MAIN FUEL JET
31	1399-2785	NOZZLE, MAIN
32	10-23178	SCREW, PLUG - MAIN NOZZLE
33	24-20869	SPRING, THROTTLE SHAFT RETURN (UPPER CARBURETOR)
34	10-28845	SCREW, PLUG - BODY CHANNEL
35	19-20011	WELCH PLUG, BODY CHANNEL
36	27-757911	GASKET, CARBURETOR FLANGE
37	11-29250	NUT, CARBURETOR MOUNTING STUD

▶CARBURETOR LINKAGE AND CHOKE SOLENOID (34 parts)

Ref	OEM Part #	Part Name
1	37585	CHOKE SOLENOID, TOP COWL 0101
2	30050	TERMINAL, CHOKE SOLENOID LEAD
3	10-26066	SCREW, CHOKE SOLENOID TO FRONT BRACKET
4	13-8M0204647	LOCKWASHER, CHOKE SOLENOID SCREW
5	11-22053	NUT, CHOKE SOLENOID SCREW
6	54-33361	CLIP, CHOKE SOLENOID LEAD
7	48315A4	PLUNGER AND LINK ASSEMBLY, CHOKE SOLENOID
8	12-30164	WASHER, PLUNGER AND LINK
9	18-26953	COTTER PIN, LINK TO UPPER CHOKE SHUTTER
10	90242A1	KNOB, CHOKE ROD
11	25-20116	GROMMET, CHOKE KNOB
12	37591	"U" LINK, CHOKE ROD TO CHOKE KNOB
13	10-69022	SCREW, "U" LINK TO CHOKE KNOB
14	13-26996	LOCKWASHER, "U" LINK SCREW
15	18-210711	COTTER PIN, "U" LINK TO CHOKE ROD
16	38458	ROD, CHOKE (NOT AS SHOWN)
17	17-25391	RIVET, CHOKE SHUTTER TO CHOKE ROD
18	38604	SHUTTER, CHOKE - CARBURETOR
19	23-30438	BUSHING, NYLON - UPPER CHOKE SHUTTER
20	16-30172	STUD, CARBURETOR - CHOKE SHUTTER PIVOT
21	12-30164	WASHER, CHOKE SHUTTER CARBURETOR STUD
22	11-20110	NUT, CHOKE SHUTTER TO CARBURETOR STUD
23	1333-2741	CARBURETOR ASSEMBLY ( SERIAL #2010163 AND UP)
24	10-657461	STUD, TENSION SPRING TO CARBURETOR SEE NOTE BELOW
24A	24-28965	SPRING, TENSION - CHOKE ROD TO CARBURETOR SEE NOT BELOW
25	23-32427	SPACER, TENSION SPRING STUD
25A	10-28713	SCREW, TENSION SPRING TO CARBURETOR
26	11-8M0207775	NUT, TENSION SPRING STUD
26A	27711	RETAINER, SPRING
27	24-37678	SPRING, TENSION - CHOKE ROD TO CARBURETOR
28	53719A2	THROTTLE PICK-UP BRACKET ASSEMBLY
29	10-29239	SCREW, THROTTLE PICK-UP BRACKET MOUNTING
30	27917	CLUSTER, THROTTLE LEVER (UPPER CARBURETOR)
31	1395-6027	SCREW, CLUSTER TO THROTTLE LEVER

▶CLAMP AND SWIVEL BRACKET ASSEMBLY (41 parts)

Ref	OEM Part #	Part Name
1	1440-1797A1	CLAMP BRACKET ASSEMBLY
2	28403A3	THUMB SCREW ASSEMBLY
3	12-28404	WASHER, THUMB SCREW
4	8M0041936	TUBE, TILT - CLAMP BRACKET TO SWIVEL BRACKET
5	12-52864	SHIM, CLAMP BRACKET TO SWIVEL BRACKET
6	11-858869	NUT, TILT TUBE FASTENING
7	53078	CAP, PLASTIC - TILT TUBE ENDS
8	16-59625	STUD, CLAMP BRACKET
9	23-59624	SPACER, CLAMP BRACKET STUD
10	13-8M0204647	LOCKWASHER, CLAMP BRACKET STUD
11	11-22053	NUT, STUD TO CLAMP BRACKET
12	17-8M0026068	TILT LOCK PIN ASSEMBLY
13	26903A3	REVERSE LOCK ASSEMBLY
14	18-45882	COTTER PIN, REVERSE LOCK TO SHAFT
15	24-29821	SPRING, TENSION - REVERSE LOCK
16	17-25598	ROLL PIN, REVERSE LOCK SPRING ATTACHING
17	56349	SHAFT, REVERSE LOCK TO SWIVEL BRACKET
18	1442-2502A1	SWIVEL BRACKET ASSEMBLY (LONG SHAFT)
19	26-32911	OIL SEAL, SWIVEL BRACKET
20	22-69059	FITTING, GREASE - SWIVEL BRACKET
21	19-77633Q	LUBRICAP, SWIVEL BRACKET GREASE FITTING
22	29057	LEVER, TILT STOP - STARBOARD SIDE
23	29056	LEVER, TILT STOP - PORT SIDE
24	10-27791	SCREW, ANCHOR - TILT STOP LEVER
25	23-29055	SPACER, TILT STOP LEVER ANCHOR SCREW
26	10-27790	SCREW, RETAINING - TILT STOP LEVER
27	13-20846	WASHER, WAVE - RETAINING SCREW (PORT SIDE)
28	11-8M0207775	NUT, ANCHOR AND RETAINING SCREW
29	12-26837	WASHER, SWIVEL PIN TO BOTOTM YOKE (.065)
30	77416T1	YOKE, BOTTOM
31	17-28419A5	SWIVEL PIN AND STEERING ARM ASSY (LONG SHAFT)
32	10-31830	SCREW, STEERING ARM TO RIDE GUIDE KIT
33	11-8M0204726	NUT, STEERING ARM SCREW
34	10-33986	BOLT, UPPER MOUNT TO SWIVEL PIN
35	30711	BUMPER, STEERING ARM
36	11-71956	NUT, RETAINING - SWIVEL PIN
37	38-56267	SERIAL PLATE
38	10-25612	SCREW, DRIVE - SERIAL PLATE TO SWIVEL BRACKET
39	10-68298	BOLT, CLAMP BRACKET TO BOAT TRANSOM
40	12-68410	WASHER, CLAMP BRACKET TRANSOM BOLT
41	11-82670912	NUT, CLAMP BRACKET TRANSOM BOLT

▶COWLING AND FRONT COVER (17 parts)

Ref	OEM Part #	Part Name
--	92-86166Q1	GLUE (BLANKET ADHESIVE)
1	2182-7927A5	COWL FRONT COVER ASSEMBLY
4	56848	KNOB, COWL FRONT COVER FASTENING
5	12-30771	WASHER, COVER FASTENING KNOB
6	12-27129	WASHER, COVER FASTENING KNOB
7	24-30772	SPRING, TENSION - COVER FASTENING KNOB
8	17-29077	PIN, ROLL - TENSION SPRING TO KNOB
9	38674	BLANKET, SOUND ABSORBING
10	31095	SEAL, SOUND - LOWER SECTION
11	38133	SEAL, SOUND - UPPER SECTION
12	2118-3247A3	WRAP AROUND COWL ASSEMBLY
13	46785A1	HANDLE, COWL LATCH
14	17-21057	PIN, HINGE - HANDLE TO COWL LATCH
15	53-21058	"E" RING, HANDLE TO COWL LATCH HINGE PIN
16	46785A1	SWIVEL, COWL LATCH
17	30413	HOOK, COWL LATCH FASTENING
21	37794	BLANKET, SOUND ABSORBING

▶CRANKSHAFT, PISTON AND CONNECTING ROD (30 parts)

Ref	OEM Part #	Part Name
--	39-28616A12	RING, PISTON (.015 OVERSIZE)
1	11-8M0214915	NUT, FLYWHEEL
2	12-33001	WASHER, FLYWHEEL NUT
3	28-20094	KEY, FLYWHEEL DRIVE
4	400-2976A2	CRANKSHAFT
5	25-29619	"O" RING, DRIVE SHAFT SPLINE
6	500-5345A4	CENTER MAIN BEARING ASSEMBLY
7	17-20032	DOWEL PIN, CENTER MAIN BEARING
8	29-20046T	BEARING, NEEDLE
9	20047	RACE, OUTER
10	53-20048	RING, SNAP - OUTER RACE CLAMPING
11	10-28666	SCREW, CENTER MAIN BEARING CLAMPING
12	17-20379	DOWEL PIN, (STEPPED)
13	534-3267T25	MAIN BEARING ASSEMBLY ( VALVE TYPE)
14	17-20032	DOWEL PIN, MAIN BEARING
15	10-25313	SCREW, MAIN BEARING CLAMPING (1/2")
16	11-29469	NUT, MAIN BEARING CLAMPING SCREW
17	34-88498A1	REED SET, MATCHED - MAIN BEARING
18	34-20053	REED STOP, MAIN BEARING REED VALVES
19	10-77280	SCREW, REED STOP MOUNTING (1/2")
20	11-29469	NUT, REED STOP MOUNTING SCREW
21	724-2537A2	PISTON AND PISTON PIN ASSEMBLY
22	40-20057	LOCK RING, PISTON PIN
23	39-27841A12	RING, PISTON
24	600-2748A2	CONNECTING ROD AND CAP ASSEMBLY (SEE NOTE BELOW)
25	10-45379	SCREW, CAP TO CONNECTING ROD
26	11-20061	NUT, CONNECTING ROD SCREW
27	29-20046T	BEARING, NEEDLE - CRANKPIN
28	29-20063	BEARING, NEEDLE - PISTON PIN
29	12-28121	WASHER, NEEDLE LOCATING

▶CYLINDER BLOCK AND CRANKCASE ASSEMBLY (58 parts)

Ref	OEM Part #	Part Name
1	1100-339A1	END CAP ASSEMBLY, UPPER
2	26-41953	OIL SEAL
3	25-20081	"O" RING, UPPER END CAP
4	30-63742T	BALL BEARING, UPPER END CAP
5	15-20082A1	SHIM, UPPER END CAP TO CYL. BLOCK AND CRANKCASE
6	10-29198	SCREW, UPPER END CAP MOUNTING
7	831-4989A7	CYLINDER BLOCK AND CRANKCASE ASSEMBLY
8	90435	MOUNT, RUBBER - CRANKCASE
9	11-8M0207775	NUT, CRANKCASE RUBBER MOUNT
10	17-20032	DOWEL PIN, CYLINDER BLOCK TO MAIN BEARING
11	17-20323	DOWEL PIN, CYLINDER BLOCK TO CENTER MAIN BEARING
12	22-328022	PLUG, PIPE - WATER PRESSURE AND BALANCE TUBE HOLES
13	16-64936	STUD, CARBURETOR MOUNTING
14	16-33111	STUD, CRANKCASE TO DRIVE SHAFT HOUSING (1 9/16")
15	17-43044	DOWEL PIN, CRANKCASE TO CYLINDER BLOCK
16	16-8M0034463	STUD, CYLINDER BLOCK TO DRIVE SHAFT HOUSING (3 7/16")
17	16-34378	STUD, CYLINDER BLOCK TO DRIVE SHAFT HOUSING (2 5/16")
18	16-29989	STUD, CYLINDER BLOCK TO DRIVE SHAFT HOUSING (1 15/16")
19	22-291112	CONNECTOR, WATER TELL TALE HOLE - CYLINDER BLOCK
20	10-69091	SCREW, CRANKCASE TO CYLINDER BLOCK (1 5/8")
21	10-22039	SCREW, CRANKCASE TO CYLINDER BLOCK (2 3/4")
22	12-20084	WASHER, CRANKCASE SCREW
23	11-29250	NUT, CRANKCASE SCREW
24	10-98260	SCREW, MAIN BEARING LOCKING
25	14-20091	TAB WASHER, BEARING LOCKING SCREW
26	10-20359	SCREW, CENTER MAIN BEARING LOCKING
27	1102-4181A3	END CAP ASSEMBLY, LOWER
28	21-28481A1	CHECK VALVE ASSEMBLY, LOWER END CAP
29	26-29478	OIL SEAL, LOWER
30	26-41953	OIL SEAL, UPPER
31	25-20081	"O" RING, LOWER END CAP
32	30-63742T	BALL BEARING, LOWER END CAP
33	15-20085A1	SHIM, LWOER END CAP TO CRANKCASE AND CYL. BLOCK
34	10-29198	SCREW, LOWER END CAP MOUNTING
35	32-8M0108355	TUBE, BALANCE - MAIN BEARING
36	22-291112	CONNECTOR, BALANCE TUBE TO CYLINDER BLOCK
37	54-20386	CLAMP, BALANCE TUBE TO CONNECTORS
38	27-36393	GASKET, CYLINDER BLOCK TO BAFFLE PLATE
39	90421T01	PLATE, BAFFLE - EXHAUST MANIFOLD
40	27-37277	GASKET, BAFFLE PLATE TO EXHAUST COVER
41	46112A3	COVER, EXHAUST MANIFOLD
42	10-37562	SCREW, MANIFOLD COVER TO CYLINDER BLOCK (1")
43	10-39661	SCREW, MANIFOLD COVER TO HIGH TENSION LEAD CLIP
44	54-52905	CLIP, HIGH TENSION LEAD
45	1017-7054A1	COVER, CYLINDER BLOCK
46	27-85487	GASKET, CYLINDER BLOCK COVER
47	10-20653	SCREW, CYLINDER BLOCK COVER MOUNTING
48	11-8M0207775	NUT, COVER MOUNTING SCREW
49	90435	MOUNT, RUBBER - CYLINDER BLOCK COVER
50	11-8267089	NUT, CYLINDER BLOCK COVER RUBBER MOUNT
51	27935	COVER, TRANSFER PORT
52	27-279361	GASKET, TRANSFER PORT COVER
53	10-28635	SCREW, TRANSFER PORT COVER MOUNTING (CAP HEAD)
54	22-62365A1	CHECK VALVE ASSEMBLY, BLEED HOSE (UPPER)
55	21-28481A1	CHECK VALVE ASSEMBLY, BLEED HOSE VALVE
56	32-9912688	HOSE, CYLINDER BLEED (6 1/2")
57	22-67902	CONNECTOR, CYLINDER BLEED HOSE (LOWER)
58	54-20387	CLAMP, BLEED HOSE TO CHECK VALVE AND CONNECTOR

▶DRIVE SHAFT HOUSING ASSEMBLY (47 parts)

Ref	OEM Part #	Part Name
1	1553-2488A1	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	19-32298	PLUG, PLASTIC - WATER PICK-UP SCREW HOLE
5	11-8M0204653	NUT, GEAR HOUSING TO DRIVE SHAFT HOUSING STUDS (7/16")
6	28593	ROD, PUSH - REVERSE LOCK (LONG SHAFT)
7	18-25191	COTTER PIN, PUSH ROD TO REVERSE LOCK
8	24-25122	SPRING, TENSION - PUSH ROD
9	17-24887	PIN, REVERSE LOCK LEVER
10	52920	LEVER, REVERSE LOCK
11	22-390721	PLUG, GREASE - REVERSE LOCK HOLE
12	35474T	COVER, LOWER MOUNT CLAMP
13	10-29722	SCREW, COVER TO LOWER MOUNT CLAMP
14	11-35521	NUT, LOWER MOUNT CLAMP COVER
15	69592F1	CLAMP, LOWER MOUNT TO DRIVE SHAFT HOUSING
16	10-29256	SCREW, LOWER MOUNT CLAMP TO DRIVE SHAFT HOUSING
17	24-35522	SPRING, TENSION - LOWER MOUNT CLAMP
18	75304T1	MOUNT, RUBBER - LOWER
19	25067	BUMPER, RUBBER - LOWER MOUNT SCREW
20	10-75284	SCREW, LOWER MOUNT (5 1/2")
21	12-28051	WASHER, LOWER MOUNT SCREW
22	12-28053	WASHER, RUBBER - LOWER MOUNT SCREW
23	12-30119	WASHER, LOWER MOUNT SCREW
24	11-25096	NUT, LOWER MOUNT SCREW
25	75305	MOUNT, RUBBER - UPPER
26	24929	PACKING, "U" CUP - UPPER MOUNT COVERS
27	79680A1	COVER, UPPER MOUNT - OUTSIDE HALF
28	79680A1	COVER, UPPER MOUNT - INSIDE HALF
29	10-28772	SCREW, UPPER MOUNT COVER - REAR (1 1/2")
30	10-37941	SCREW, UPPER MOUNT COVER - FRONT (1 3/4")
31	11-35888	NUT, UPPER MOUNT COVER FASTENING SCREW
32	12-30520	WASHER, UPPER MOUNT BOLT (37/64 ID)
33	12-30521	WASHER, RUBBER - UPPER MOUNT BOLT
34	12-30519	WASHER, UPPER MOUNT BOLT (3/8 ID)
35	11-23161	NUT, UPPER MOUNT BOLT
36	27-385011	GASKET, EXHAUST EXTENSION PLATE TO DRIVE SHAFT HOUSING
37	11-862902	NUT, POWERHEAD TO DRIVE SHAFT HOUSING STUDS (5/16")
38	37719	TUBE, EXHAUST (LONG SHAFT)
39	23-23651	SLEEVE, WATER INLET TUBE
40	32-37726	TUBE, WATER INLET (LONG SHAFT)
41	38157	SEAL, TRIM COVER TO DRIVE SAHFT HOUSING
42	38154	STRIP, RETAINING - TRIM COVER SEAL (SIDE)
43	38158	STRIP, RETAINING - TRIM COVER SEAL (REAR)
44	10-37571	SCREW, RETAINING STRIP TO DRIVE SHAFT HOUSING
45	12-30164	WASHER, RETAINING STRIP SCREW
46	37687	COVER, TRIM - DRIVE SHAFT HOUSING
49	10-37571	SCREW, TRIM COVER TO DRIVE SHAFT HOUSING

▶FLYWHEEL ASSEMBLY AND STATOR (16 parts)

Ref	OEM Part #	Part Name
1	11-8M0214915	NUT, FLYWHEEL
2	12-33001	WASHER, FLYWHEEL NUT
3	28-20094	KEY, FLYWHEEL DRIVE
4	223-2403A18	FLYWHEEL ASSEMBLY
5	50-39837	RATCHET, FLYWHEEL - FLEX PLATE
6	10-32417	SCREW, PLATE AND RATCHET TO FLYWHEEL HUB
7	10-96138	SCREW, FLEX PLATE TO FLYWHEEL
8	17-26618	PIN, DOWEL - PULLEY TO FLYWHEEL
9	29788	FLANGE, FLYWHEEL PULLEY
10	30306	PULLEY, FLYWHEEL
11	29787	HUB, FLANGE - FLYWHEEL PULLEY
12	398-2171	STATOR, ALTERNATOR - FLYWHEEL
13	10-57021	SCREW, STATOR TO UPPER END CAP
14	54-24836	CLAMP, STATOR LEAD TO CRANKCASE
15	10-8M0113176	SCREW, STATOR LEAD CLAMP FASTENING
16	8M0084613	"D" WASHER, STATOR LEAD CLAMP SCREW

▶FUEL PUMP ASSEMBLY (27 parts)

Ref	OEM Part #	Part Name
1	30269A2	FUEL PUMP ASSEMBLY
2	27-23005	GASKET, CHECK VALVE TO HOUSING
3	21-8M0082362	VALVE, CHECK
4	23004	RETAINER, CHECK VALVE
5	10-43725	SCREW, RETAINER TO HOUSING
6	27-24863	GASKET, FUEL PUMP
7	23014A1	DIAPHRAGM, FUEL PUMP
8	23008	COVER, FUEL PUMP
9	27-30276	GASKET, FUEL PUMP COVER
10	10-30274	SCREW, FUEL PUMP MOUNTING (1 3/4")
11	10-29878	SCREW, FUEL PUMP MOUNTING (1 1/2")
12	24-24949	CONNECTOR, PUMP INLET TO FUEL LINE
13	22-22946	SLEEVE, RUBBER - CONNECTOR
14	22-22948	NUT, CONNECTOR TO FUEL LINE
15	32-32094	FUEL LINE, PUMP TO LOWER AND UPPER FILTER
16	22-22995	ELBOW, FUEL PUMP INLET
17	22-22946	SLEEVE, RUBBER
18	22-22948	NUT, ELBOW
19	32-30036	FUEL LINE, FUEL PUMP TO ADAPTOR
20	22-37682	CONNECTOR, FUEL LINE TO ADAPTOR
21	30186	ADAPTOR, CHECK UNIT (FUEL LINE)
22	30187	STEM, CHECK UNIT ADAPTOR
23	25-16524	"O" RING, ADAPTOR STEM
24	24-30189	SPRING, ADAPTOR STEM
25	30188	CUP WASHER, ADAPTOR
26	10-21937	SCREW, ADAPTOR TO BOTTOM COWL (2")
27	11-8M0207775	NUT, ADAPTOR SCREW

▶GEAR HOUSING ASSEMBLY, COMPLETE (PAGE 1) (49 parts)

Ref	OEM Part #	Part Name
-	1626-2470A19	GEAR HOUSING ASSEMBLY, COMPLETE (LONG SHAFT)
1	1626-2470A16	GEAR HOUSING ASSEMBLY
2	31-62091T	BEARING, ROLLER - DRIVE SHAFT
3	16-57934	STUD, WATER PUMP BODY AND BASE TO GEAR HOUSING
4	16-8M0034453	STUD, GEAR HOUSING TO DRIVE SHAFT HOUSING
5	12-45176	WASHER, GEAR HOUSING STUD
6	92815	PLATE, SUPPORT - EXHAUST TUBE SEAL
7	37721001	SEAL, EXHAUST TUBE
8	43-20834	GEAR, PINION - DRIVE SHAFT
9	14-29163	TAB WASHER, PINION GEAR SCREW
10	10-20925	SCREW, PINION GEAR TO DRIVE SHAFT
11	56622A1	SHAFT, SHIFT - LOWER
12	53-29641	CLIP, RETAINING - SHIFT SHAFT
13	25-25439	"O" RING, SHIFT SHAFT BUSHING
14	23-46284A1	BUSHING ASSEMBLY, SHIFT SHAFT
15	26-892361	OIL SEAL, SHIFT SHAFT BUSHING
16	12-31266	WASHER, RUBBER - SHIFT SHAFT BUSHING
17	52918	CAM, LOWER - REVERSE LOCKING
18	52919	CAM, UPPER - REVERSE LOCKING
19	45-38467	DRIVE SHAFT (LONG SHAFT)
20	15-20929A1	SHIM, BEARING TO GEAR HOUSING
21	30-72961	BEARING, BALL - DRIVE SHAFT
22	53-29116	RING, SNAP - BALL BEARING RETAINING
23	15-20929A1	SHIM, BEARING TO WATER PUMP BASE
24	27-32771	GASKET, WATER PUMP BASE TO GEAR HOUSING
25	25-26855	"O" RING, WATER PUMP BASE
26	46-39531A1	WATER PUMP BASE ASSEMBLY
27	26-79831	OIL SEAL, WATER PUMP BASE
28	26-90562	OIL SEAL, WATER PUMP BASE
29	17-35973	DOWEL PIN, WATER PUMP BASE TO WATER PUMP BODY
30	27-19553	GASKET, LOWER - WATER PUMP BASE TO FACE PLATE
31	32768	PLATE, FACE - WATER PUMP BASE TO WATER PUMP BODY
32	27-19551	GASKET, UPPER - FACE PLACE TO WATER PUMP BODY
33	47-89983T	IMPELLER, WATER PUMP
34	28-8M0032837	PIN, IMPELLER DRIVE
35	26-38452	SEAL, WATER PUMP BODY TO WATER TUBE STARTED WITH SERIAL # Comment: SERIAL 00000000-01811268
36	12-38453	WASHER, CUPPED - WATER TUBE SEAL Comment: SERIAL 01811269-09999999
37	46-60366Q1	WATER PUMP BODY ASSEMBLY Comment: SERIAL 01811269-09999999
38	32001	INSER, WATER PUMP BODY
39	26-32121	OIL SEAL, WATER PUMP BODY
40	13-26992	LOCKWASHER, WATER PUMP BODY AND BASE STUDS
41	11-29598	NUT, WATER PUMP BODY AND BASE STUDS
42	25-20273	RING, RUBBER - CENTRIFUGAL SLINGER
43	25-29619	"O" RING, UPPER - DRIVE SHAFT
44	10-29608	SCREW, GEAR HOUSING FLUSHING HOLE
45	27-8M0214916	GASKET, GEAR HOUSING FLUSHING HOLE SCREW
46	26-8M0214917	SEAL, GEAR HOUSING FLUSHING HOLE SCREW
47	10-79953Q04	SCREW, GREASE FILLER AND VENT HOLE
48	12-191833	WASHER, GREASE FILLER AND VNET HOLE SCREW

▶GEAR HOUSING ASSEMBLY, COMPLETE (PAGE 2) (38 parts)

Ref	OEM Part #	Part Name
-	1626-2470A19	GEAR HOUSING ASSEMBLY, COMPLETE (LONG SHAFT)
--	43-39942	REVERSE GEAR ASSEMBLY, COMPLETE
1	1626-2470A16	GEAR HOUSING ASSEMBLY SEE PAGE 27 FOR PARTS BREAKDOWN
49	97-31640Q4	TRIM TAB, GEAR HOUSING
50	10-32470	SCREW, TRIM TAB TO GEAR HOUSING
51	760394	CAM, SHIFT
52	38441	FOLLOWER, CAM
53	20843	SLIDE, CROSS PIN
54	24-39845	SPRING, COMPRESSION - CAM FOLLOWER
55	15-31154A1	SHIM, BEARING CUP TO GEAR HOUSING
56	43-39941A2	FORWARD GEAR ASSEMBLY
57	31-20249	BEARING, ROLLER - FORWARD GEAR
58	31-31215A1	TAPERED ROLLER BEARING ASSEMBLY
59	31-31216	CUP, TAPERED ROLLER BEARING
60	52-92911T	RATCHET, SLIDING CLUTCH
61	17-8M0020942	PIN, CROSS - RATCHET TO PROPELLER SHAFT
62	24-38114	SPRING, RETAINING - CROSS PIN
63	44-38127	SHAFT, PROPELLER
64	43-39942	REVERSE GEAR ASSEMBLY
65	12-32004	WASHER, THRUST - REVERSE GEAR
66	30-20839T	BEARING, BALL - REVERSE GEAR
67	15-20927A1	SHIM, THRUST WASHER TO GEAR HOUSING
68	25-31986	"O" RING, BEARING CARRIER
69	53014T1	BEARING CARRIER ASSEMBLY Comment: SERIAL 01811269-09999999
70	31-20249	BEARING, ROLLER - BEARING CARRIER Comment: SERIAL 01811269-09999999
71	26-23517	OIL SEAL, BEARING CARRIER Comment: SERIAL 01811269-09999999
72	28-30281	KEY, LOCATING - BEARING CARRIER
73	12-31993	WASHER, GEAR HOUSING COVER
74	11-87763	COVER, GEAR HOUSING
75	12-8M0214963	WASHER, DRIVE SHAFT HOUSING STUD (3/8")
76	11-8M0204726	NUT, DRIVE SHAFT HOUSING TO GEAR HOUSING (3/8")
77	12-45176	WASHER, DRIVE SAHFT HOUSING STUD (7/16")
78	11-8M0204653	NUT, DRIVE SHAFT HOUSING TO GEAR HOUSING (7/16")
79	12-25251	WASHER, BACKING - PROPELLER SHAFT (1/8")
80	38859A1	THRUST HUB AND WASHER ASSEMBLY
81	12-31992	WASHER, CUPPED - THRUST HUB
82	12-32007	WASHER, SPLINED - PROPELLER SHAFT
83	11-82671120	NUT, PROPELLER

▶MAGNETO ADAPTOR AND PILOT ASSEMBLY (60 parts)

Ref	OEM Part #	Part Name
-	29321A9	MAGNETO ADAPTOR AND PILOT ASSEMBLY, COMPLETE
1	394-2271A2	MAGNETO ASSEMBLY, COMPLETE (4D-4)
2	45-27951	SHAFT, MAGNETO DRIVE
3	39560A1	MAGNETO PILOT ASSEMBLY
4	30-20066	BALL BEARING, MAGNETO PILOT
5	24-27944	SPRING, HORSESHOE - MAGNETO PILOT
6	17-27962	PIN, ANCHOR - HORSESHOE SPRING TO PILOT
7	12-8M0204649	WASHER, HORSESHOE SPRING TO ANCHOR PIN
8	27946A1	ECONOMIZER COLLAR AND PIN ASSEMBLY
9	17-27961	PIN, ECONOMIZER COLLAR - SPRING RETAINER
10	22-25094	FITTING, GREASE - ECONOMIZER COLLAR
11	38230A1	THROTTLE ACTUATOR ASSEMBLY
12	23-26602	BUSHING, NYLON - THROTTLE ACTUATOR
13	10-31009	SCREW, THROTTLE ACTUATOR TO ECONOMIZER COLLAR
14	66856A1	ADAPTOR, MAGNETO
15	22-25094	FITTING, GREASE - MAGNETO ADAPTOR
16	12-27939	WASHER, MAGNETO PILOT
17	14-27960	TAB WASHER, ADAPTOR CAP FASTENING
18	13-27959	WASHER, WAVE - MAGNETO BALL BEARING TENSION
19	27955	CAP, MAGNETO ADAPTOR AND PILOT FASTENING
20	27947	SWIVEL, LINKAGE - ECONOMIZER COLLAR
21	25996A1	SWIVEL AND LINK ROD ASSEMBLY
22	11-25168	NUT, UPPER LINK ROD ADJUSTING
23	37700	ROD, LINK - UPPER
24	27948	SWIVEL, UPPER LINK ROD TO THROTTLE CONTROL LEVER
25	53143A2	LEVER, THROTTLE CONTROL
26	10-98556	SCREW, THROTTLE LEVER TO EXHAUST COVER
27	12-8M0042641	WASHER, THROTTLE LEVER SCREW
28	23-29529	BUSHING, THROTTLE LEVER SCREW
29	24-37934	SPRING, QUICK DISCONNECT - THROTTLE CABLE TO THROTTLE LEVER
30	10-38069	SCREW, ANCHOR - QUICK DISCONNECT SPRING TO THROTTLE LEVER
31	10-30110	SCREW, ADAPTOR AND PILOT TO MAGNETO
32	10-78841	SCREW ADAPTOR AND PILOT TO CRANKCASE
33	12-20084	WASHER, ADAPTOR AND PILOT TO CRANKCASE SCREW
34	11-22053	NUT, ADAPTOR AND PILOT TO CRANKCASE SCREW
35	28-28657	KEY, MAGNETO DRIVING
36	29784	HUB, DRIVEN PULLEY
37	29783A1	DRIVEN PULLEY ASSEMBLY
38	17-24873	PIN, ROLL - FLANGE LOCATING
39	29785	FLANGE, DRIVEN PULLEY
40	12-20138	WASHER, PULLEY CLAMPING SCREW
41	10-32228	SCREW, PULLEY CLAMPING
42	20140	BELT, TIMING
43	53458	PLATE, THROTTLE STOP
45	10-24933	SCREW, THROTTLE STOP ADJUSTING
46	11-20088	NUT, THROTTLE STOP ADJUSTING SCREW
47	26852	CAP, NYLON - ADJUSTING SCREW
48	10-69035	SCREW, THROTTLE STOP PLATE TO ADAPTOR
49	37996	GROUND STRAP, THROTTLE STOP PLATE SCREW
50	12-8M0204649	WASHER, UPPER SWIVEL TO THROTTLE LEVER
51	11-826709109	NUT, UPPER SWIVEL TO THROTTLE LEVER
52	33-813413	SPARK PLUG
53	85-63709A1	PROTECTOR, SPARK PLUG
54	84-821945A46	CABLE, HIGH TENSION LEAD - SPARK PLUG
55	25-25429	"O" RING, HIGH TENSION LEAD CABLE TO END CAP COVER
56	54-25231	CLIP, HARNESS LEADS TO MAGNETO
57	10-20401	SCREW, LEAD CLIP TO MAGNETO
58	8M0084613	"D" WASHER, CLIP FASTENING SCREW
59	394-1134A1	GROUND STRAP ASSEMBLY, MAGNETO TO CRANKCASE
60	32-46768	SLEEVE, HIGH TENSION LEAD (3")

▶MAGNETO ASSEMBLY (INTERNAL PARTS) (44 parts)

Ref	OEM Part #	Part Name
-	394-2271A2	MAGNETO ASSEMBLY, COMPLETE
1	394-1570	FRAME, MAGNETO HOUSING
2	10-25510	SCRE, SET - COIL BRIDGE
3	394-1051	LOCKWIRE, COIL BRIDGE SET SCREW
4	30-24998	BEARING, BALL (DRIVE END)
5	394-1067A1	MAGNETIC ROTOR AND SHAFT
6	30-49090	BEARING, BALL (OPPOSITE DRIVE END)
7	394-1637	SUPPORT, BALL BEARING
8	10-25509	SCREW AND LOCKWASHER, SUPPORT TO FRAME
9	84-60466A13	WIRE ASSEMBLY, PRIMARY GROUND LEAD
10	10,10-29182	SCREW, PRIMARY GROUND
11	12-30267	WASHER, PRIMARY GROUND TERMINAL
12	394-1579	INSULATOR, PRIMARY GROUND TERMINAL
13	12-29099	WASHER, INSULATING - PRIMARY GROUND SCREW
14	23-62769	BUSHING, INSULATING - HOUSING FRAME
15	12-26014	WASHER, PRIMARY GROUND SCREW
16	11-24656	NUT, LOCK - PRIMARY GROUND SCREW
17	11-68219	NUT, PRIMARY GROUND SCREW
18	394-1128A1	COIL ASSEMBLY
19	394-1050	CLIP, COIL - HIGH TENSION
20	13-23836	LOCKWASHER, COIL TERMINAL
21	394-1131	NUT, COIL CLIP FASTENING
22	393-1504A11	BREAKER ASSEMBLY
23	393-1586	GROMMET, PLASTIC - BREAKER BRACKET
24	16-29230	STUD, PRIMARY LEAD AND TENSION SPRING
25	11-29236	NUT, PRIMARY LEAD FASTENING
26	394-1106A1	HOLDER AND CAM WICK ASSEMBLY
27	53-21058	"E" RING, BREAKER TO PIVOT PIN
28	10-20597	SCREW, BREAKER HOLDER TO HOUSING
29	394-1130A1	CONDENSER
30	10-25509	SCREW AND LOCKWASHER, CONDENSER FASTENING
31	27-29166	GASKET, MAGNETO COVER
32	394-1577A2	COVER, MAGNETO
33	10-29418	SCREW, COVER TO FRAME
34	14-29157	TAB WASHER, COVER FASTENING SCREW
35	394-2602A1	MAGNETO ROTOR ASSEMBLY
36	394-1110	CLIP, SPRING
37	27-25725	GASKET, END CAP COVER
38	394-1561A2	END CAP COVER ASSEMBLY
39	394-1056A1	BRUSH AND SPRING ASSEMBLY
40	10-25517	SCREW, HIGH TENSION CABLE FASTENING
41	10-29418	SCREW, END CAP COVER TO MAGNETO COVER
42	14-29157	TAB WASHER, COVER FASTENING SCREW
43	22-996642	ELBOW, PLASTIC - MAGNETO COVER VENT

▶STARTER MOTOR, STARTER SOLENOID, RECTIFIER & WIRING HARNESS (29 parts)

Ref	OEM Part #	Part Name
--	11-20890	NUT, GROUND WIRE SCREW
1	32177A2	RECTIFIER ASSEMBLY
2	13-8M0204647	LOCKWASHER, RECTIFIER MOUNTING SCREW
3	11-21929	NUT, RECTIFIER MOUNTING SCREW
4	32-28373	SLEEVE, RECTIFIER LEADS
5	10-35400	SCREW, HARNESS AND STATOR TO RECTIFIER
6	11-8M0204718	NUT, HANRESS AND STATOR LEADS SCREW
7	30212	TERMINAL BLOCK
8	10-72169	SCREW, TERMINAL BLOCK TO CYLINDER BLOCK
9	10-62568	SCREW, WIRING HARNESS LEADS TO TERMINAL BLOCK
10	50-55601A2	STARTER MOTOR ASSEMBLY Comment: SERIAL 01857030-09999999
11	10-22698	SCREW, STARTER MOTOR TO CRANKCASE FLANGE
12	13-8M0204647	LOCKWASHER, STARTER MOTOR SCREW
13	84-93389A12	WIRE, STARTER MOTOR TO STARTER SOLENOID
14	10-69035	SCREW, GROUND WIRE TO STARTER MOTOR
15	13-26992	LOCKWASHER, GROUND WIRE FASTENING SCREW
16	28016A1	GROUND STRAP ASSEMBLY
17	32445A1	STARTER SOLENOID
18	10,13-26996	LOCKWASHER, SOLENOID TERMINAL
19	10,11-68219	NUT, SOLENOID TERMINAL
20	13-8M0204647	LOCKWASHER, SOLENOID TERMINAL (5/16")
21	11-22053	NUT, SOLENOID TERMINAL - INSIDE (5/16")
22	11-26062	NUT, CAP - SOLENOID TERMINAL - OUTSIDE (5/16")
23	10-29238	SCREW, STARTER SOLENOID TO STARTER MOTOR
24	38072	WIRING HARNESS (INTERNAL)
25	26079A2	PLATE, BACKING - WIRING HARNESS
26	10-45893	SCREW, BACKING PLATE TO BOTTOM COWL
27	24-28975	SPRING, GARTER - INTERNAL WIRING HARNESS
28	54-22783	"S" CLIP, WIRING HARNESSS LEAD TO BOTTOM COWL

▶TOP COWL ASSEMBLY AND SUPPORT BRACKETS (ELECTRIC) (40 parts)

Ref	OEM Part #	Part Name
1	37679	HANDLE, CHROME - TOP COWL
2	37689	HANDLE, INSIDE - TOP COWL
3	35496	PAD, BUMPER - TOP COWL HANDLE
4	12-20533	WASHER, TOP COWL HANDLE STUD (9/16" O.D.)
5	12-69057	WASHER, TOP COWL HANDLE STUD (3/4" O.D.)
6	11-21825	NUT, TOP COWL HANDLE STUD
7	10-35386	SCREW, HANDLE TO TOP COWL (1")
8	13-8M0204647	LOCKWASHER, HANDLE TO TOP COWL SCREW
9	2117-4068A1	TOP COWL
10	37411	BRACKET, TOP COWL LATCH
11	10-37560	SCREW, LATCH BRACKET TO TOP COWL
12	11-37556	NUT, LATCH BRACKET SCREW
13	27690	SHIELD, REAR - TOP COWL
14	10-37370	SCREW, REAR SHIELD TO TOP COWL
15	13-37371	LOCKWASHER, REAR SHIELD SCREW
17	37702A1	TRIM MOULDING ASSEMBLY, TOP COWL
18	34433	BRACKET, TENSION - TRIM MOULDING
19	10-23015	SCREW, BRACKET AND TRIM MOULDING TO TOP COWL
20	12-34434	WASHER, BRACKET FASTENING SCREW
21	11-20110	NUT, BRACKET FASTENING SCREW
22	52899	BRACKET, REAR COWL SUPPORT
23	37640	MOUNT, RUBBER - REAR SUPPORT BRACKET
24	13-8M0204647	LOCKWASHER, REAR SUPPORT BRACKET RUBBER MOUNT
25	12-26825	WASHER, REAR SUPPORT BRACKET RUBBER MOUNT
26	11-22053	NUT, REAR SUPPORT BRACKET RUBBER MOUNT
27	37412	LEVER, CLAMPING - TOP COWL
28	23-26819	BUSHING, TOP COWL CLAMPING LEVER (NYLON)
29	23-31293	BUSHING, TOP COWL CLAMPING LEVER (RUBBER)
30	11-30428	FASTENER, TOP COWL CLAMPING LEVER
31	17-29077	PIN, ROLL - TOP COWL CLAMPING LEVER
32	25-20116	GROMMET, CHOKE KNOT - FRONT SUPPORT BRACKET
33	47904A2	BRAKCET ASSEMBLY, FRONT SUPPORT
34	37921	FLANGE, RUBBER - FRONT SUPPORT BRACKET
35	32-8M0108355	TUBE, DRAIN - FRONT SUPPORT BRACKET TO BOTTOM COWL
36	10-35386	SCREW, FRONT SUPPORT BRACKET TO BOTTOM COWL (1")
37	31014	MOUNT, RUBBER - FRONT SUPPORT BRACKET
38	13-26992	LOCKWASHER, FRONT SUPPORT BRACKET RUBBER MOUNT
39	12-69057	WASHER, FRONT SUPPORT BRACKET RUBBER MOUNT
40	11-20088	NUT, FRONT SUPPORT BRACKET RUBBER MOUNT
41	47341A11	STARTER CABLE (FOR MANUAL STARTING ONLY)

▶TOP COWL ASSEMBLY, STARTER SHEAVE & SUPPORT BRACKETS MANUAL (54 parts)

Ref	OEM Part #	Part Name
1	37679	HANDLE, CHROME - TOP COWL
2	37689	HANDLE, INSIDE - TOP COWL
3	35496	PAD, BUMPER - TOP COWL HANDLE
4	12-20533	WASHER, TOP COWL HANDLE STUD (9/16" O.D.)
5	12-69057	WASHER, TOP COWL HANDLE STUD (3/4" O.D.)
6	11-21825	NUT, TOP COWL HANDLE STUD
7	10-35386	SCREW, HANDLE TO TOP COWL (1")
8	13-8M0204647	LOCKWASHER, HANDLE TO TOP COWL SCREW
9	12-26825	WASHER, HANDLE TO TOP COWL SCREW
10	2117-2479A2	TOP COWL ASSEMBLY
11	16-21550	STUD, REAR - TOP COWL TO REAR SUPPORT BRACKET
12	16-21553	STUD, FRONT - TOP COWL TO FRONT SUPPORT BRACKET
13	25-20116	GROMMET, CHOKE KNOB - TOP COWL
14	12-20084	WASHER, TOP COWL STUD (5/16")
15	11-826709111	NUT, TOP COWL STUD (5/16-24)
16	13-35048	LOCKWASHER, TOP COWL STUD (3/8")
17	11-46335	NUT, TOP COWL STUD (3/8-24)
18	37690	SHIELD, REAR - TOP COWL
19	10-37370	SCREW, REAR SHIELD TO TOP COWL
20	13-37371	LOCKWASHER, REAR SHIELD SCREW
21	12-69056	WASHER, REAR SHIELD SCREW
23	37702A1	TRIM MOULDING ASSEMBLY, TOP COWL
24	34433	BRACKET, TENSION - TRIM MOULDING
25	10-23015	SCREW, BRACKET AND TRIM MOULDING TO TOP COWL
26	12-34434	WASHER, BRACKET FASTENING SCREW
27	11-20110	NUT, BRACKET FASTENING SCREW
28	52899	BRACKET, REAR COWL SUPPORT
29	14-20165	TAB WASHER, SHEAVE SHAFT NUT
30	11-20166	NUT, SHEAVE SHAFT (LEFT HAND THREAD)
31	37685	HOUSING, STARTER
32	10-90073	SCREW, STARTER HOUSING TO CRANKCASE AND CYLINDER BLOCK (1")
33	13-20202	LOCKWASHER, STARTER HOUSING SCREW
34	37691	PLATE, CABLE GUIDE
35	10-358811	SCREW, DRIVE - CABLE GUIDE PLATE TO STARTER HOUSING
36	39835	RETAINER, STARTER SPRING
37	24-39502T02	SPRING, STARTER REWIND
38	23-28912	BUSHING, SPRING GUIDE
39	76053A1	SHEAVE ASSEMBLY
40	30596	PAWL, STARTER
41	13-36206	WASHER, WAVE - STARTER PAWL
42	23-28919	BUSHING, NYLON - SHEAVE SHAFT SPACER
43	45477A1	SPACER, SHEAVE SHAFT
44	39840	RETAINER, WAVE WASHER
45	12-26180	WASHER, WAVE WASHER RETAINER
46	13-20160	WASHER, WAVE - RETAINER TENSION
47	66845	PLATE, RETAINER - STARTER PAWL
48	45477A1	SHAFT, SHEAVE
49	50-12066Q10	STARTER CABLE ASSEMBLY
50	28747	HANDLE, STARTER CABLE
51	79470A1	RETAINER, STARTER CABLE AND HANDLE
52	47904A2	BRACKET ASSEMBLY, FRONT SUPPORT
53	37921	FLANGE, RUBBER - FRONT SUPPORT BRACKET
54	32-8M0108355	TUBE, DRAIN - FRONT SUPPORT BRACKET TO BOTTOM COWL
55	10-35386	SCREW, FRONT SUPPORT BRACKET TO BOTTOM COWL (1")

100-Hour / Annual Service Checklist

Regular maintenance keeps your Mercury 500 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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