Mercury 500, 50 (4357640 THRU 5531629) Parts & Diagrams

🔎 Mercury 500, 50 Reference Library — Exploded parts diagrams (24 diagrams), specifications, common issues, and maintenance checklist.

The Mercury 500, 50 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, 50:

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, 50.

▶BOTTOM COWL ASSEMBLY (24 parts)

Ref	OEM Part #	Part Name
1	2116-7715A4	BOTTOM COWL ASSEMBLY
2	57786	COVER, PLUG-BOTTOM COWL HARNESS HOLE Comment: REMOVE-NOT REQUIRED ON ELECTRIC ENGINE
3	10-45862	SCREW, PLUG COVER TO BOTTOM COWL Comment: REMOVE-NOT REQUIRED ON ELECTRIC ENGINE
4	13-26996	LOCKWASHER, PLUG COVER SCREW Comment: REMOVE-NOT REQUIRED ON ELECTRIC ENGINE
5	12-847883	WASHER, PLUG COVER SCREW Comment: REMOVE-NOT REQUIRED ON ELECTRIC ENGINE
6	16-68169	STUD Comment: BOTTOM COWL TO REAR SUPPORT BRACKET
7	11-35888	NUT, BOTTOM COWL STUD
8	37695	BOOT, CONTROL CABLE
9	37637	BOOT, FUEL CONNECTOR
10	37692	SUPPORT, EXTERNAL WIRING HARNESS-ELECTRIC
11	10-67916	SCREW, HARNESS SUPPORT TO BOTTOM COWL (2")
12	11-8M0207775	NUT, HARNESS SUPPORT SCREW
13	72466	DRIP TRAY
14	45409	SCREW, DRIP TRAY TO BOTTOM COWL (1/2")
15	32-8M0108355	HOSE, TELL TALE HOSE TO BOTTOM COWL (14")
16	69791	NOZZLE, TELL TALE HOSE TO BOTTOM COWL
17	66849	CLAMP, NOZZLE-TELL TALE
18	10-48408	SCREW, NOZZLE CLAMP TO BOTTOM COWL (1/2")
19	23-90882	SLEEVE, TELL TALE NOZZLE
20	54-68424	CLAMP, TELL TALE NOZZLE
21	87-69508A9	STOP SWITCH ASSEMBLY-MANUAL
22	84-62190A8	WIRE ASSEMBLY, STOP SWITCH (ORANGE)
23	11-69844	NUT, STOP SWITCH
24	32-8M0108355	HOSE, DRIP TRAY (7 1/2")

▶CARBURETOR ASSEMBLY (27 parts)

Ref	OEM Part #	Part Name
-	27-72486A32	GASKET SET
--	1399-5137	DIAPHRAGM AND GASKET KIT
1	1367-6517A61	CARBURETOR ASSEMBLY, COMPLETE
4	1395-9296A1	CHOKE SHAFT
6A	814483	BAFFLE, FUEL BOWL
7	1395-9293	FLOAT
9	1399-5127	FUEL BOWL
11	1399-5415	SCREW, FUEL BOWL TO CARBURETOR
13	1395-9022	INLET NEEDLE AND SPRING
14	1399-1655	JET, MAIN FUEL (.055)
15	1399-6249	JET, ECOMONIZER (.096)
16	69692	VENTURI
17	1399-5194	VALVE, CHOKE RELIEF
18	1399-5414	SPRING, CHOKE RELIEF VALVE
19	1399-5197	CHOKE SHUTTER
20	10-23035	SCREW, CHOKE SUTTER TO CHOKE SHAFT
25	1399-5129	BODY, FUEL PUMP
28	1364-5585	BODY, STRAINER
29	1395-808612	SCREW, STRAINER BODY TO CARBURETOR
30	1399-5758	SCREEN, STRAINER
32	99941	COVER, INLET
34	1399-2012	THROTTLE SHAFT
35	8146791	LEVER, THROTTLE (SEE NOTE BELOW)
36	1395-6027	SCREW, THROTTLE LEVER ATTACHING
39	1399-6225	THROTTLE SHUTTER
41	27-757911	GASKET, CARBURETOR FLANGE
42	11-29250	NUT, CARBURETOR MOUNTING STUD

▶CARBURETOR LINKAGE AND CHOKE SOLENOID (34 parts)

Ref	OEM Part #	Part Name
-	27-72486A32	GASKET SET
1	89-889274	CHOKE SOLENOID-ELECTRIC Comment: ELECTRIC
2	13-26996	LOCKWASHER, CHOKE SOLENOID TERMINAL Comment: ELECTRIC
3	11-45076	NUT, CHOKE SOLENOID TERMINAL Comment: ELECTRIC
4	10-26066	SCREW, CHOKE SOLENOID TO FRONT BRACKET Comment: ELECTRIC
5	13-8M0204647	LOCKWASHER, CHOKE SELENOID SCREW Comment: ELECTRIC
6	11-22053	NUT, CHOKE SOLENOID SCREW Comment: ELECTRIC
7	56074A8	PLUNGER AND LINK ASSEMBLY Comment: CHOKE SELENOID (ELECTRIC)
8	90241	KNOB, CHOKE (MANUAL)
8A	90242A1	KNOB ASSEMBLY (ELECTRIC)
9	10-77137	SCREW, STRAP TO CHOKE KNOB (ELECTRIC)
10	49589	STRAP, CHOKE KNOB TO CHOKE ROD (ELECTRIC)
11	10-69570	SCREW, STRAP TO CHOKE ROD (ELECTRIC)
12	25-20116	GROMMET, FRONT BRACKET (CHOKE KNOB) Comment: (ELECTRIC)
13	85966A1	CHOKE ROD Comment: UNITED STATES 5193258 AND BELOW AUSTRALIA 8057394 AND BELOW BELGIUM 9217255
13A	85966A1	CHOKE ROD ASSEMBLY Comment: UNITED STATES 5193259 AND UP AUSTRALIA 8057395 AND UP BELGIUM 9217256 AND UP
13B	10-77614A1	SCREW, CHOKE ROD
14	24-60288	SPRING, CHOKE ROD
15	53719A2	PICK-UP BRACKET ASSEMBLY
16	10-53651	SCREW, PICK-UP BRACKET
17	28-89694	INSERT, COUPLING
18	32-8M0108355	FUEL LINE Comment: CARBURETOR TO TEE TO CARBURETOR (2")
19	54-68424	CLAMP, FUEL LINE
20	22-73318	TEE, FUEL LINE
21	32-8M0108355	FUEL LINE, ADAPTOR TO TEE (6")
21A	24-68434	SPRING, FUEL LINE
22	22-63981	FITTING, FUEL LINE TO ADAPTOR
23	22833	ADAPTOR, CHECK UNIT (FUEL LINE)
24	23069	STEM, CHECK UNIT ADAPTOR
25	25-16524	"O" RING, ADAPTOR STEM
26	24-23067T	SPRING, ADAPTOR STEM
27	30188	CUP WASHER, ADAPTOR
28	10-67916	SCREW Comment: ADAPTOR TO BOTTOM COWL (2") (ELECTRIC)
29	11-8M0207775	NUT, ADAPTOR SCREW

▶CLAMP BRACKET ASSEMBLY (45 parts)

Ref	OEM Part #	Part Name
-	27-72486A32	GASKET SET
1	1440-8394A1	CLAMP BRACKET ASSEMBLY Comment: WASHER ATTACHED WITH A SCREW
2	10-78492A1	THUMB SCREW ASSEMBLY Comment: WASHER ATTACHED WITH A SCREW
2A	12-78493	WASHER, THUMB SCREW Comment: WASHER ATTACHED WITH A SCREW
2B	10-78495	SCREW, WASHER TO THUMB SCREW Comment: WASHER ATTACHED WITH A SCREW
3	75043	CAP, THUMB SCREW Comment: WASHER ATTACHED WITH A SCREW
4	8M0041936	TUBE, TILT Comment: CLAMP BRACKET TO SWIVEL BRACKET
5	12-52864	WASHER, CLAMP BRACKET TILT TUBE
6	11-858869	NUT, TILT TUBE FASTENING
7	53078	CAP, PLASTIC - TILT TUBE
8	23-59624	SPACER, CLAMP BRACKET STUD
9	16-59625	STUD, CLAMP BRACKET
10	13-8M0204647	LOCKWASHER, CLAMP BRACKET STUD
11	11-28770	NUT, CLAMP BRACKET STUD
12	17-8M0026068	TILT LOCK PIN ASSEMBLY
13	32-28052	SLEEVE, RUBBER - TILT LOCK PIN BUMPER
14	10-68299	BOLT, CLAMP BRACKET TO BOAT TRANSOM (3")
15	12-68300	WASHER, CLAMP BRACKET BOLT
16	11-82670912	NUT, CLAMP BRACKET BOLT
17	55-28416	PIN, UPPER SHOCK MOUNTING
18	23-73203	BUSHING, CLAMP BRACKET
19	76386	TILT LOCK ASSEMBLY, STARBOARD
20	76385T	TILT LOCK ASSEMBLY, PORT
21	47802	TUBE, TILT LOCK Comment: UNITED STATES 5193258 AND BELOW AUSTRALIA 8057394 AND BELOW BELGIUM 9217255 AND BELOW CANADA 7116222 AND BELOW
22	23-71574	BUSHING, TILT LOCK TUBE
23	13-69150	WASHER, WAVE - TILT LOCK TUBE
24	79659	COUPLING, TILT LOCK
25	12-76388	WASHER, TILT LOCK
26	25-627021	"O" RING, TILT LOCK
27	18-47959	COTTER PIN, TILT LOCK TUBE
28	55-696531	PIN, LOWER SHOCK MOUNTING
29	24-78203A2	SPRING, REVERSE LOCK TENSION Comment: UNITED STATES 5193259 AND UP AUSTRALIA 8057395 AND UP BELGIUM 9217256 AND UP
30	87432	REVERSE LOCK ASSEMBLY
31	56349	SHAFT, REVERSE LOCK PIVOT
32	23-69132	BUSHING, REVERSE PIVOT SHAFT
33	18-45882	COTTER PIN, REVERSE LOCK TO SHAFT
34	12-28196	WASHER, UPPER BUSHING RETAINER (INNER)
35	12-59378	WASHER, LOWER BUSHING RETAINER (INNER)
36	55-58780A7	SHOCK ABSORBER
37	23-32171	BUSHING, RUBBER - SHOCK ABSORBER (UPPER)
38	23-28198	BUSHING, RUBBER - SHOCK ABSORBER (LOWER)
39	12-69374	WASHER Comment: UPPER AND LOWER BUSHING RETAINER (OUTER) UNITED STATES 4576237 AND UP AUSTRALIA 8042650 AND UP BELIGUM 9136250 AND UP CANADA 7088598 AND UP
40	10-69375	SCREW Comment: UPPER AND LOWER SHOCK MOUNTING PIN (5/8") UNITED STATES 4576237 AND UP AUSTRALIA 8042650 AND UP BELIGUM 9136250 AND UP CANADA 7088598 AND UP
41	70679	COVER Comment: UPPER AND LOWER SHOCK MOUNTING PIN UNITED STATES 4357640 THRU 4576236 AUSTRALIA 8030090 THRU 8042649 BELGIUM 9107214 THRU 9136249 CANADA 7068998 THRU 7088597
42	10-37655	SCREW Comment: COVER TO SHOCK MOUNTING SCREWS (1/2") UNITED STATES 4357640 THRU 4576236 AUSTRALIA 8030090 THRU 8042649 BELGIUM 9107214 THRU 9136249 CANADA 7068998 THRU 7088597

▶COWLING AND FRONT COVER (14 parts)

Ref	OEM Part #	Part Name
--	92-86166Q1	GLUE (BLANKET ADHESIVE)
1	2182-7927A5	COWL FRONT COVER ASSEMBLY Comment: UNITED STATES 4576237 AND UP AUSTRALIA 8042650 AND UP BELGIUM 9136250 AND UP CANADA 7088598 AND UP
2	56848	KNOB, COWL FRONT COVER FASTENING
3	12-30771	WASHER, COVER FASTENING KNOB
4	12-59572	WASHER, COVER FASTENING KNOB
5	24-30772	SPRING, TENSION-COVER FASTENING KNOB
6	17-29077	PIN, ROLL-TENSION SPRING TO KNOB
7	38674	BLANKET, SOUNG ABSORBING
8	31095	SEAL, SOUND-LOWER SECTION
9	38133	SEAL, SOUND-UPPER SECTION
10	2118-3247A3	WRAP AROUND COWL ASSEMBLY
11	46785A1	COWL LATCH ASSEMBLY
12	30413	HOOK, COWL LATCH FASTENING
13	37794	BLANKET, SOUND ABSORBING

▶CRANKSHAFT, PISTON AND CONNECTING ROD (30 parts)

Ref	OEM Part #	Part Name
-	27-72486A32	GASKET SET
1	459-9075T	CRANKSHAFT Comment: UNITED STATES 5193259 AND UP AUSTRALIA 8057395 AND UP BELGIUM 9217256 AND UP
2	60834A3	CARRIER ASSEMBLY, "O" RING Comment: METAL SEAL CARRIER PRESSED IN CRANKSHAFT
3	64254001	"O" RING, CARRIER Comment: METAL SEAL CARRIER PRESSED IN CRANKSHAFT
4	547-7060A2	CENTER MAIN BEARING ASSEMBLY Comment: UNITED STATES 5193259 AND UP AUSTRALIA 8057395 AND UP BELGIUM 9217256 AND UP
5	17-20032	DOWEL PIN, CENTER MAIN BEARING Comment: UNITED STATES 5193259 AND UP AUSTRALIA 8057395 AND UP BELGIUM 9217256 AND UP
6	29-714221	BEARING, NEEDL Comment: UNITED STATES 5193259 AND UP AUSTRALIA 8057395 AND UP BELGIUM 9217256 AND UP
7	26113T	RACE, OUTER Comment: UNITED STATES 5193259 AND UP AUSTRALIA 8057395 AND UP BELGIUM 9217256 AND UP
8	53-26933	RING, SNAP-OUTER RACE CLAMPING Comment: UNITED STATES 5193259 AND UP AUSTRALIA 8057395 AND UP BELGIUM 9217256 AND UP
9	10-8M0214943	SCREW, CENTER MAIN BEARING CLAMPING (1") Comment: UNITED STATES 5193259 AND UP AUSTRALIA 8057395 AND UP BELGIUM 9217256 AND UP
10	11-8M0207775	NUT,CENTER MAIN BEARING SCREW Comment: UNITED STATES 5193258 AND BELOW AUSTRALIA 8057394 AND BELOW BELGIUM 9217255 AND BELOW CANADA 7116222 AND BELOW
11	17-27732	DOWEL PIN (STEPPED) Comment: UNITED STATES 5193259 AND UP AUSTRALIA 8057395 AND UP BELGIUM 9217256 AND UP
12	534-3267T25	MAIN BEARING ASSEMBLY (VALVE TYPE)
13	17-20032	DOWEL PIN, MAIN BEARING
14	17-65855	DOWEL PIN, REED LOCATING
15	10-45775	SCREW, MAIN BEARING CLAMPING (9/16")
16	11-45774	NUT, MAIN BEARING CLAMPING SCREW
17	34-88498A1	REED SET, MATCHED
18	34-822839	REED STOP Comment: UNITED STATES 4962056 AND UP AUSTRALIA 8053230 AND UP BELGIUM 9195686 AND UP CANADA 7115573 AND UP
19	10-77280	SCREW, REED STOP MOUNTING (9/16")
20	11-20110	NUT,REED STOP MOUNTING SCREW
21	780-9229A7	PISTON AND PISTON PIN ASSEMBLY
22	40-828119	LOCK RING, PISTON PIN
23	39-27841A12	RING, PISTON
24	632-7621A3	CONNECTING ROD AND CAP ASSEMBLY
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	12-47275	WASHER, NEEDLE LOCATING

▶CYLINDER BLOCK AND CRANKCASE ASSEMBLY (28 parts)

Ref	OEM Part #	Part Name
1	863-8981A6	CYLINGER BLOCK AND CRANKCASE ASS'Y Comment: UNITED STATES 5193259 AND UP AUSTRALIA 8057395 AND UP BELGIUM 9217256 AND UP
2	72038	BRACKET, STARTER MOTOR (UPPER)
3	10-73278	SCREW, BRACKET TO CRANKCASE (1 5/8")
4	13-8M0204647	LOCKWASHER, BRACKET SCREW
5	76867	COVER, STARTER MOTOR (LOWER)
6	10-73279	SCREW, COVER TO CRANKCASE (1 7/8")
7	46933A3	CABLE ASSEMBLY, GROUNG
8	17-20032	DOWEL PIN, CYLINDER BLOCK TO MAIN HEARING
9	17-20323	DOWEL PIN, CENTER MAIN BEARING Comment: UNITED STATES 5193258 AND BELOW AUSTRALIA 8057394 AND BELOW BELGIUM 9217255 AND BELOW CANADA 7116222 AND BELOW
10	16-64936	STUD, CARBURETOR MOUNTING (1 1/4")
11	16-68165	STUD Comment: CRANKCASE TO DRIVE SHAFT HOUSING (1 5/8")
12	17-43044	DOWEL PIN, CRANKCASE TO CYLINDER BLOCK
13	16-68168	STUD Comment: CYL. BLOCK TO DRIVE SHAFT HOUSING (3 11/16")
14	16-68166	STUD Comment: CYL. BLOCK TO DRIVE SHAFT HOUSING (2 1/8")
15	16-68167	STUD Comment: CYL. BLOCK TO DRIVE SHAFT HOUSING (1 9/16")
16	22-291112	CONNECTOR, TELL TALE-CYLINDER BLOCK Comment: UNITED STATES 4962055 AND BELOW AUSTRALIA 8053229 AND BELOW BELGIUM 9195685 AND BELOW CANADA 7115572 AND BELOW
16A	22-782792	ELBOW, TELL TALE-CYLINGER BLOCK Comment: UNITED STATES 4962056 AND UP AUSTRALIA 8053230 AND UP BELGIUM 9195686 AND UP CANADA 7115573 AND UP
17	10-73275	SCREW, CRANKCASE TO CYLINDER BLOCK (2 7/8")
18	12-8M0042642	WASHER, CRANKCASE SCREW
19	10-98260	SCREW, MAIN BEARING LOCKING (5/8")
21	32-8M0108355	TUBE, BALANCE-MAIN BEARING (5 1/2")
22	22-996642	ELBOW, BALANCE TUBE TO CYLINDER BLOCK
23	21-428671	CHECK VALVE, BLEED HOSE (LOWER)
24	32-9938779	HOSSE, CYLINDER BLEED (11")
25	22-56759	CONNECTOR, CYLINDER BLEED HOSE (UPPER)
26	99156	INDICATOR, TIMING Comment: ELECTRIC
27	10-39349	SCREW, INDICATOR TO CRANKCASE (3/4") Comment: ELECTRIC
28	13-8M0204647	LOCKWASHER, INDICATOR SCREW Comment: ELECTRIC

▶DRIVE SHAFT HOUSING ASSEMBLY (50 parts)

Ref	OEM Part #	Part Name
-	27-72486A32	GASKET SET
1	1593-7513A12	DRIVE SHAFT HOUSING ASSEMBLY (LONG SHAFT) Comment: UNITED STATES 4962056 AND UP AUSTRALIA 8053230 AND UP BELGIUM 9195686 AND UP CANADA 7115573 AND UP
2	19-64649	PLUG, PLASTIC - TRIM TAB SCREW HOLE
3	16-8M0022145	STUD Comment: DRIVE SHAFT HOUSING TO GEAR HOUSING (1 3/4")
4	16-57935	STUD Comment: DRIVE SHAFT HOUSING TO GEAR HOUSING (3")
5	11-8M0204653	NUT Comment: GEAR HOUSING TO DRIVE SHAFT HOUSING STUDS (7/16")
6	12-65791	WASHER, GEAR HOUSING TO DRIVE SHAFT HOUSING STUDS (7/16")
7	47836	ROD, PUSH - REVERSE LOCK (LONG SHAFT)
8	11-28770	NUT, JAM - PUSH ROD
9	47837	ROD END, PUSH ROD
10	24-78203A2	PIN, REVERSE LOCK LEVER Comment: UNITED STATES 5193258 AND BELOW AUSTRALIA 8057394 AND BELOW BELGIUM 9217255 AND BELOW CANADA 7116222 AND BELOW
11	18-25191	COTTER PIN, PUSH ROD TO REVERSE LOCK
12	933361	GUIDE, PUSH ROD Comment: UNITED STATES 5193259 AND UP AUSTRALIA 8057395 AND UP BELGIUM 9217256 AND UP
13	35474T	COVER, LOWER MOUNT CLAMP
14	10-29722	SCREW, COVER TO LOWER MOUNT CLAMP
15	11-35521	NUT, LOWER MOUNT CLAMP COVER
16	69592F1	CLAMP, LOWER MOUNT TO DRIVE SHAFT HOUSING
17	10-29256	SCREW Comment: LOWER MOUNT CLAMP/DRIVE SHAFT HOUSING
18	24-35522	SPRING, TENSION - LOWER MOUNT CLAMP
19	75304T1	MOUNT, RUBBER - LOWER
20	25067	BUMPER, RUBBER - LOWER MOUNT SCREW
21	10-75284	SCREW, LOWER MOUNT SCREW
22	12-28051	WASHER, LOWER MOUNT SCREW
23	12-28053	WASHER, RUBBER - LOWER MOUNT SCREW
24	12-30119	WASHER, LOWER MOUNT SCREW
25	11-25096	NUT, LOWER MOUNT SCREW
26	75305	MOUNT, RUBBER - UPPER
26A	25-65936	"O" RING, UPPER MOUNT Comment: UNITED STATES 4962055 AND BELOW AUSTRALIA 8053229 AND BELOW BELGIUM 9195685 AND BELOW CANADA 7115572 AND BELOW
27	96401	SEAL, BELLOWS - UPPER MOUNT Comment: UNITED STATES 4962056 AND UP AUSTRALIA 8053230 AND UP BELGIUM 9195686 AND UP CANADA 7115573 AND UP
28	79680A1	COVER, UPPER MOUNT - OUTSIDE HALF
29	79681	COVER, UPPER MOUNT - INSIDE HALF
30	10-69029	SCREW, UPPER MOUNT COVER - REAR (1 3/4")
31	10-67916	SCREW, UPPER MOUNT COVER - FRONT (2")
31A	12-8M0204649	WASHER, UPPER MOUNT COVER SCREW
32	11-36069	NUT, UPPER MOUNT COVER SCREW
33	12-27727	WASHER, UPPER MOUNT BOLT (37/64 ID)
34	12-66966	WASHER, RUBBER - UPPER MOUNT BOLT
35	12-30519	WASHER, UPPER MOUNT BOLT (3/8 ID)
36	11-23161	NUT, UPPER MOUNT BOLT
37	27-385011	GASKET Comment: EXHAUST EXTENSION PLATE TO DRIVE SHAFT HOUSING
38	11-64809	NUT Comment: POWERHEAD TO DRIVE SHAFT HOUSING STUDS (5/16")
39	695441	TUBE, EXHAUST (LONG SHAFT)
40	32-45679	TUBE, WATER INLET (LONG SHAFT)
41	38157	SEAL, TRIM COVER TO DRIVE SHAFT HOUSING
42	38154	STRIP, RETAINING - TRIM COVER SEAL (SIDE)
43	38158	STRIP, RETAINING - TRIM COVER SEAL (REAR)
44	10-48408	SCREW Comment: RETAINING STRIP TO DRIVE SHAFT HOUSING (SELF TAPPING)
45	37687	COVER, TRIM - DRIVE SHAFT HOUSING
46	10-57807	SCREW, TRIM COVER TO DRIVE SHAFT HOUSING
47	25-92012	GROMMET, TRIM COVER SCREW

▶ELECTRIC COMPONENTS (26 parts)

Ref	OEM Part #	Part Name
1	8M0058226	RECTIFIER ASSEMBLY
2	11-45076	NUT, RECTIFIER TERMINAL
3	10-20411	SCSREW, RECTIFIER TO SWITCH BOX PLATE (5/8")
4	50-898265005	STARTER MOTOR ASSEMBLY
5	8M0043376	STOP, RUBBER-STARTER MOTOR
6	23-8M0034918	COLLAR, RUBBER-STARTER MOTOR MOUNT
7	23-56774	SPACER, COLLAR TO BRACKET
8	84-93389A1	WIRE ASSEMBLY Comment: STARTER MOTOR TO SOLENOID (YELLOW)
9	11-64015	NUT, WIRE TO STARTER MOTOR (1/4-20)
10	84-93388A14	WIRE ASSEMBLY Comment: STARTER MOTOR TO BRACKET (BLACK)
11	10-69035	SCREW, WIRE TO STARTER MOTOR (5/8")
12	89-853654A1	STARTER SOLENOID
13	10,13-26996	LOCKWASHER, SOLENOID TERMINAL
14	10,11-45076	NUT, SOLENOID TERMINAL
15	13-8M0204647	LOCKWASHER, SOLENOID TERMINAL (5/16")
16	11-21908	NUT, SOLENOID TERMINAL (5/16")
17	46265	BOOT, TERMINAL-STARTER SOLENOID
18	10-98253	SCREW, SELENOID TO SUPPORT BRACHET (1/2")
19	13-26992	WASHER, STARTER SOLENOID SCREW
20	84-73447A1	WIRING HARNESS (INTERNAL)
21	24-28975	SPRING, GARTER-INTERNAL WIRING HARNESS
22	54-76368	CLAMP, WIRING HARNESS
23	10-45862	SCREW Comment: WIRING HARNESS CLAMP TO BOTTOM COWL (7/8")
24	13-26996	LOCKWASHER, WIRING HARNESS CLAMP SCREW
25	12-847883	WASHER, WIRING HARNESS CLAMP SCREW
26	61990	STA-STRAP, WIRING HARNESS

▶END CAPS, MANIFOLD AND EXHAUST COVERS (33 parts)

Ref	OEM Part #	Part Name
-	27-72486A32	GASKET SET
1	863-8981A6	CYLINDER BLOCK AND CRANKCASE ASS'Y Comment: SEE "CYLINDER BLOCK AND CRANKCASE ASS'Y" FOR BREAKDOWN UNITED STATES 5193259 AND UP AUSTRALIA 8057395 AND UP BELGIUM 9217256 AND UP
2	1160-5826A2	END CAP ASSEMBLY, UPPER
3	26-41953	OIL SEAL
4	25-20081	"O" RING, UPPER END CAP
5	30-63742T	BALL BEARING, UPPER END CAP
6	15-72538A1	SHIM Comment: UPPER END CAP TO CYL. BLOCK/CRANKCASE (.005-10)
7	10-824941	SCREW, UPPER END CAP MOUNTING (3/4")
8	90435	MOUNT, RUBBER-CRANKCASE
9	11-8M0207775	NUT, CRANKCASE RUBBER MOUNT
10	84-65773A5	GROUND STRAP, CRANKCASE MOUNT
11	1158-6635T1	END CAP ASSEMBLY, LOWER Comment: UNITED STATES 4962056 AND UP AUSTRALIA 8053230 AND UP BELGIUM 9195686 AND UP CANADA 7115573 AND UP
13	26-41953	OIL SEAL, LOWER END CAP
14	25-20081	"O" RING, LOWER END CAP
15	30-63742T	BALL BEARING, LOWER END CAP
16	15-20085A1	SHIM Comment: LOWER END CAP TO CRANKCASE/CYL, BLOCK (.005-10)
17	10-29256	SCREW, LOWER END CAP MOUNTING (7/8")
18	27-854913	GASKET Comment: CYLINDER BLOCK TO BAFFLE PLATE
19	90421T01	PLATE, BAFFLE-EXHAUST MANIFOLD
20	27-854924	GASKET, BAFFLE PLATE TO EXHAUST COVER
21	77381	COVER, EXHAUST MANIFOLD Comment: UNITED STATES 4576237 AND UP AUSTRALIA 8042650 AND UP BELGIUM 9136250 AND UP CANADA 7088598 AND UP
22	10-38837	SCREW Comment: MANIFOLD COVER TO CYLINGER BLOCK (1 1/8")
23	10-73281	SCREW Comment: ADJUSTING-ECHAUST MANIFOLD COVER (1 3/4")
24	11-20890	NUT, ADJUSTING SCREW
25	26852	CAP, ADJUSTING SCREW
26	1017-7054A1	COVER ASSEMBLY, CYLINDER BLOCK Comment: UNITED STATES 4962056 AND UP AUSTRALIA 8053230 AND UP BELGIUM 9195686 AND UP CANADA 7115573 AND UP
27	22-328022	PLUG, PIPE-CYLINDER BLOCK COVER
28	27-85487	GASKET, CYLINDER BLOCK COVER
29	10-8M0214943	SCREW, CYLINDER BLOCK COVER (1")
31	18827A1	COVER ASSEMBLY, TRANSFER PORT Comment: UNITED STATES 4576237 AND UP AUSTRALIA 8042650 AND UP BELGIUM 9136250 AND UP CANADA 7088598 AND UP
33	18827A1	COVER, TRANSFER PORT Comment: UNITED STATES 4357640 THRU 4576236 AUSTRALIA 8030090 THRU 8042649 BELGIUM 9107214 THRU 9136249 CANADA 7068998 THRU 7088597
34	27-279361	GASKET, TRANSFER PORT COVER
35	10-20540	SCREW, TRANSFER PORT COVER MOUNTING (5/8")

▶EXHAUST EXTENSION PLATE AND SHIFT LINKAGE (35 parts)

Ref	OEM Part #	Part Name
-	27-72486A32	GASKET SET
1	42819A2	PLATE ASSEMBLY, EXHAUST EXTENSION Comment: UNITED STATES 5193259 AND UP AUSTRALIA 8057395 AND UP BELGIUM 9217256 AND UP
2	23-27132	BUSHING, EXHAUST EXTENSION PLATE
3	12-38453	WASHER, NYLON-WATER INLET TUBE
4	26-38452	SEAL, RUBBER-WATER TUBE
5	38500	RETAINER, WATER TUBE SEAL Comment: UNITED STATES 5193258 AND BELOW AUSTRALIA 8057394 AND BELOW BELGIUM 9217255 AND BELOW CANADA 7116222 AND BELOW
6	10-69069	SCREW, RETAINER TO PLATE (3/4")
7	79799	HOUSING, WATER INLET TUBE SEAL Comment: UNITED STATES 5193259 AND UP AUSTRALIA 8057395 AND UP BELGIUM 9217256 AND UP
8	27-797971	GASKET, HOUSING
9	10-79798	SCREW, HOUSING TO EXHAUST PLATE (1 3/8")
10	27-796501	GASKET Comment: POWERHEAD TO EXHAUST EXTENSION PLATE
11	38156	SEAL, RUBBER - EHAUST EXTENSION PLATE
12	99136	STRIP, RUBBER SEAL RETAINING
13	10-37571	SCREW Comment: RETAINING STRIP TO EXHAUST EXTENSION PLATE (1/2")
14	27-385011	GASKET Comment: EXHAUST EXTENSION PLATE TO DRIVE SHAFT HOUSING
15	59037A2	LEVER, THROTTLE AND SHIFT CABLES
16	24-38005	SPRING, COMPRESSION - QUICK DISCONNECT LEVER
17	23-37927	BUSHING, NYLON - QUICK DISCONNECT LEVER
18	17-239281	PIN, ROLL - QUICK DISCONNECT LEVER
19	37926	RETAINER Comment: NYLON BEARING TO EXHAUST EXTENSION PLATE
20	10-37923	SCREW Comment: RETAINER TO EXHAUST EXTENSION PLATE (1 1/2")
21	46933A1	GROUND STRAP ASSEMBLY Comment: CRANKCASE TO COWL (3 5/8")
22	46933A2	GROUND STRAP ASSEMBLY Comment: HOUSING TO COWL (3 3/8")
23	10-62568	SCREW, GROUND STRAP (3/8" SELF TAPPING)
24	76632A4	SHIFT SHAFT ASSEMBLY, UPPER (LONG SHAFT)
25	8M0221994	BARREL, NYLON - UPPER SHIFT SHAFT
26	74739A3	ACTUATOR ASSEMBLY, SHIFT CONTROL
27	24-37934	SPRING, SHIFT CABLE
28	10-38069	SCREW, SPRING TO ACTUATOR
29	37932	BEARING, NYLON - SHIFT CONTROL ACTUATOR
30	10-36137	SCREW Comment: BEARING TO SHIFT CONTROL ACTUATOR (1")
31	13-21272	LOCKWASHER, BEARING SCREW
32	37935	RAIL, SHIFT CONTROL BEARING
33	10-69028	SCREW Comment: RAIL TO EXHAUST MANIFOLD COVER (3/4")
34	13-26992	LOCKWASHER, RAIL SCREW

▶FLYWHEEL, IGNITION COIL AND SWITCH BOX (29 parts)

Ref	OEM Part #	Part Name
1	11-8M0214915	NUT, FLYWHEEL
2	12-33001	WASHER, FLYWHEEL NUT
3	28-20094	KEY, FLYWHEEL DRIVE
4	248-8722A17	FLYWHEEL ASSEMBLY (ELECTRIC)
5	10-32417	SCREW, FLEXIBLE PLATE TO FLYWHEEL (9/16)
6	50-88755	RATCHET, FLYWHEEL-MANUAL
7	10-68997	SCREW, RATCHT TO FLYWHEEL (5/8")
8	398-832075A20	STATOR (ELECTRIC)
9	10-F2211	SCREW, STATOR TO UPPER END CAP (5/8")
10	96452A4	TRIGGER ASSEMBLY Comment: UNITED STATES 4576237 AND UP AUSTRALIA 8042650 AND UP BELGIUM 9136250 AND UP CANADA 7088598 AND UP
11	54-61001	"J" CLIP, TRIGGER LEADS TO CARBURETOR STUD
12	61990	STA-STRAP, TRIGGER LEADS
13	84-88721A1	HARNESS, SWITCH BOX TO IGNITION COIL
14	339-832757A4	IGNITION COIL ASSEMBLY Comment: UNITED STATES 5193259 AND UP AUSTRALIA 8057395 AND UP BELGIUM 9217256 AND UP
15	11-45076	NUT, IGNITION COIL TERMINALS
16	84-60466A15	GROUNG WIRE, COIL TO SWITCH BOX
17	76254	COVER, IGNITION COIL Comment: UNITED STATES 4576237 AND UP AUSTRALIA 8042650 AND UP BELGIUM 9136250 AND UP CANADA 7088598 AND UP
18	10-76502	SCREW, COIL COVER (10-32 X 1 7/8")
19	84-813715A1	LEAD ASSEMBLY, SPARK PLUG
20	332-2854T01	BOOT, IGNITION COIL END
21	33-896329833	SPARK PLUG (AC#V40FFK) Comment: BELGIUM AND CANADA USE C-33-75739 SPARK PLUG
22	332-5772A7	SWITCH BOX ASSEMBLY
23	54-8M0024808	"J" CLIP, SWITCH BOX LEADS
24	10-20619	SCREW Comment: SWITCH BOX AND "J" CLIP TO PLATE (1 3/8")
25	72030	PLATE, SWITCH BOX
26	25-57009001	GROMMET, SWITCH BOX PLATE
27	12-35280	WASHER, SWITCH BOX PLATE SCREW
28	10-61551	SCREW Comment: SWITCH BOX PLATE TO CYLINDER BLOCK (1/2")
29	11-45076	NUT, SWITCH BOX TERMINALS

▶GEAR HOUSING ASSEMBLY, COMPLETE (SERIAL GROUP NO. 6)(PAGE 1) (48 parts)

Ref	OEM Part #	Part Name
-	27-72486A32	GASKET SET
1	1643-6038A6	GEAR HOUSING ASSEMBLY
2	17-8M0084726	PIN, DOWEL - GEAR HOUSING
3	16-33778	STUD Comment: WATER PUMP BODY/BASE TO GEAR HOUSING (2 5/8")
4	16-8M0034453	STUD Comment: GEAR HOUSING TO DRIVE SHAFT HOUSING (2 3/16")
5	31-62091T	BEARING, ROLLER - DRIVE SHAFT
6	72849A1	SCREEN, WATER INTAKE - PORT
7	10-36070	SCREW Comment: WATER INTAKE SCREEN TO GEAR HOUSING (1 1/4")
8	11-859124	NUT, WATER INTAKE SCREEN SCREW
9	92815	PLATE, SUPPORT - EXHAUST TUBE SEAL
10	37721001	SEAL, EXHAUST TUBE
11	43-55607	GEAR, PINION - DRIVE SHAFT
12	11-55910	NUT, PINION GEAR TO DRIVE SHAFT
13	27-32771	GASKET, WATER PUMP BASE TO GEAR HOUSING
14	25-26855	"O" RING, WATER PUMP BASE
15	46-73640T01	WATER PUMP BASE ASSEMBLY
16	26-79831	OIL SEAL, WATER PUMP BASE
17	26-90562	OIL SEAL, WATER PUMP BASE
18	17-35973	DOWEL PIN, WATER PUMP BASE TO WATER PUMP BODY
19	27-19553	GASKET Comment: LOWER - WATER PUMP BASE TO FACE PLATE
20	32768	PLATE FACE Comment: WATER PUMP BASE TO WATER PUMP BODY
21	27-19551	GASKET UPPER Comment: FACE PLATE TO WATER PUMP BODY
22	47-89983T	IMPELLER, WATER PUMP
23	28-8M0032837	KEY, IMPELLER DRIVE
24	46-77822A1	WATER PUMP BODY ASSEMBLY
25	48753	INSERT, WATER PUMP BODY
26	12-8M0204649	WASHER, WATER PUMP BODY AND BASE STUDS
27	11-36069	NUT, WATER PUMP BODY AND BASE STUDS
28	26-38452	SEAL, WATER PUMP BODY TO WATER TUBE
29	12-38453	WASHER, CUPPED - WATER TUBE SEAL
30	25-20273	RING, RUBBER - CENTRIFUGAL SLINGER
31	10-79953Q04	SCREW, GREASE FILLER AND VENT HOLE
32	12-191833	WASHER, GREASE FILLER AND VENT HOLE SCREW
35	76063A1	SHAFT ASSEMBLY, SHIFT - LOWER Comment: UNITED STATES 4576237 AND UP AUSTRALIA 8042650 AND UP BELGIUM 9136250 AND UP CANADA 7088598 AND UP
36	53-29641	CLIP, RETAINING - SHIFT SHAFT
37	25-25439	"O" RING, SHIFT SHAFT BUSHING
38	23-77631A2	BUSHING ASSEMBLY, SHIFT SHAFT
39	26-24590	OIL SEAL, SHIFT SHAFT BUSING (LOWER)
40	26-892361	OIL SEAL, SHIFT SHAFT (UPPER)
41	12-31266	WASHER, RUBBER - SHIFT SHAFT BUSHING
42	78036	BASE Comment: LOWER - REVERSE LOCKING - NOT PART OF GEAR HOUSING
43	43308T1	CAM, REVERSE LOCKING Comment: UNITED STATES 4576237 AND UP AUSTRALIA 8042650 AND UP BELGIUM 9136250 AND UP CANADA 7088598 AND UP
44	45-76088A2	DRIVE SHAFT ASSEMBLY (LONG SHAFT)
45	24-20254	SPRING, COMPRESSION - DRIVE SHAFT
46	12-30515	PIN, DRIVE SHAFT
47	88181	SLEEVE, LUBRICTAION - DRIVE SHAFT
48	15-20929A1	SHIM, BEARING TI GEAR HOUSING (.OO2-3-5-10)
49	31-38146A1	ROLLER BEARING ASSEMBLY Comment: TAPERED - DRIVE SHAFT

▶GEAR HOUSING ASSEMBLY, COMPLETE (SERIAL GROUP NO. 6)(PAGE 2) (37 parts)

Ref	OEM Part #	Part Name
-	27-72486A32	GASKET SET
1	1643-6038A6	GEAR HOUSING ASSEMBLY Comment: (SEE "GEAR HOUSING ASSEMBLY, COMPLETE" FOR BREAKDOWN
50	760394	CAM, SHIFT Comment: UNITED STATES 4576237 AND UP AUSTRALIA 8042650 AND UP BELGIUM 9136250 AND UP CANADA 7088598 AND UP
51	38441	FOLLOWER, CAM
52	20843	SLIDE, CROSS PIN
53	24-39845	SPRING, COMPRESSION - CAM FOLLOWER
54	15-38374A1	SHIM. BEARING CUP TO GEAR HOUSING (.002-3-5-10)
55	31-38356A1	TAPERED ROLLER BEARING ASSEMBLY
56	31-21739	BEARING, ROLLER - FORWARD GEAR
57	43-55608T4	FORWARD GEAR
58	52-92911T	RATCHET, SLIDING CLUTCH
59	17-8M0020942	PIN, CROSS - RATCHET TO PROPELLER SHAFT
60	24-38114	SPRING, RETAINING - CROSS PIN
61	44-75365	SHAFT PROPELLER Comment: UNITED STATES 4576237 AND UP AUSTRALIA 8042650 AND UP BELGIUM 9136250 AND UP CANADA 7088598 AND UP
62	43-79158T	REVERSE GEAR
63	15-20927A1	SHIM, THRUST WASHER TO GEAR HSG (.002-3-5-10)
64	12-32004	WASHER, THRUST - REVERSE GEAR
65	30-20839T	BEARING, BALL - REVERSE GEAR
66	25-31986	"O RING, BEARING CARRIER
67	69386T1	BEARING CARRIER ASSEMBLY
68	31-21700	BEARING, ROLLER - BEARING CARRIER
69	26-8M0205511	OIL SEAL, BEARING CARRIER (DOUBLE LIP)
70	26-8M0203757	OIL SEAL, LINE CUTTER
71	28-30281	KEY, LOCATING - BEARING CARRIER
72	14-53012	TAB WASHER, GEAR HOUSING COVER
73	11-87763	COVER, GEAR HOUSING
74	97-31640Q4	TRIM TAB ASSEMBLY, GEAR HOUSING
75	10-66024	SCREW, TRIM TAB TO GEAR HOUSING (1 3/4")
76	12-8M0214963	WASHER, DRIVE SHAFT HOUSING STUD (3/8")
77	11-8M0204726	NUT Comment: DRIVE SHAFT HOUSING TO GEAR HOUSING (3/8")
78	12-65791	WASHER, DRIVE SHAFT HOUSING STUD (7/16")
79	11-8M0204653	NUT Comment: DRIVE SHAFT HOUSING TO GEAR HOUSING (7/16")
80	73345A1	THRUST HUB, FRONT Comment: UNITED STATES 4576237 AND UP AUSTRALIA 8042650 AND UP BELGIUM 9136250 AND UP CANADA 7088598 AND UP
81	62124A1	THRUST HUB ASSEMBLY, REAR
82	12-31992	WASHER, CUPPED - THRUST HUB
83	14-8M0214942	TAB WASHER, PROPELLER
84	11-69578Q1	NUT, PROPELLER

▶GEAR HOUSING ASSEMBLY, COMPLETE (SERIAL GROUP NO. 7)(PAGE 1) (50 parts)

Ref	OEM Part #	Part Name
-	26-79831A1	SEAL KIT
1	1643-9539T1	GEAR HOUSING ASSEMBLY Comment: UNITED STATES 5193259 AND UP AUSTRALIA 8057395 AND UP BELGIUM 9217256 AND UP
1A	22-85822A10	CONNECTOR ASSEMBLY, SPEEDOMETER
2	17-8M0084726	PIN, DOWEL - GEAR HOUSING
3	16-33778	STUD Comment: WATER PUMP BODY/BASE TO GEAR HSG (2 5/8")
4	16-8M0034453	STUD, GEAR HOUISNG TO DRIVE SHAFT HOUSING
5	31-62091T	BEARING, ROLLER - DRIVE SHAFT
6	72849A1	SCREEN ASSEMBLY Comment: WATER INTAKE - STARBOARD AND PORT
7	10-36070	SCREW Comment: WATER INTAKE SCREEN TO GEAR HOUSING
8	11-859124	NUT, WATER INTAKE SCREEN SCREW
9	92815	PLATE, SUPPORT - EXHAUST TUBE
10	37721001	SEAL, EXHAUST TUBE
11	43-55607	GEAR, PINION - DRIVE SHAFT
12	11-55910	NUT, PINION GEAR TO DRIVE SHAFT
13	27-19552	GASKET, WATER PUMP BASE TO GEAR HOUSING
14	25-26722	"O" RING, WATER PUMP BASE
15	46-77177A1	WATER PUMP BASE ASSEMBLY
16	26-79831	OIL SEAL, WATER PUMP BASE
17	26-90562	OIL SEAL, WATER PUMP BASE
18	17-35973	DOWEL PIN Comment: WATER PUMP BASE TO WATER PUMP BODY
19	27-19553	GASKET, LOWER Comment: WATER PUMP BASE TO FACE PLATE
20	32768	PLATE, FACE Comment: WATER PUMP BASE TO WATER PUMP BODY
21	27-19551	GASKET, UPPER Comment: FACE PLATE TO WATER PUMP BODY
22	47-89983T	IMPELLER, WATER PUMP
23	28-8M0032837	KEY, IMPELLER DRIVE
24	46-77822A1	WATER PUMP BODY ASSEMBLY
25	48753	INSERT, WATER PUMP BODY
26	12-8M0204649	WASHER, WATER PUMP BODY AND BASE STUDS
27	11-35888	NUT, WATER PUMP BODY AND BASE STUDS
28	26-38452	SEAL Comment: RUBBER - WATER INLET TUBE (WATER PUMP BODY)
29	12-38453	WASHER, NYLON - WATER PUMP BODY
30	25-20273	RING Comment: RUBBER - CENTRIFUGAL SLINGER (DRIVE SHAFT)
31	22-8M0058389	SCREW, DRAIN (MAGNETIC)
32	12-191833	WASHER,GREASE FILLER AND DRAIN SCREW
35	76063A1	SHAFT ASSEMBLY, SHIFT - LOWER
36	53-29641	CLIP, RETAINING - SHIFT SHAFT
37	25-25439	"O" RING, SHIFT SHAFT BUSHING
38	23-77631A2	BUSHING ASSEMBLY, SHIFT SHAFT
39	26-8M0204708	OIL SEAL, SHIFT SHAFT BUSHING
41	12-77674	WASHER, RUBBER - SHIFT SHAFT BUSHING
42	78036	BASE, REVERSE LOCKING
43	43308T1	CAM, REVERSE LOCKING
44	45-77389A2	DRIVE SHAFT ASSEMBLY (LONG SHAFT)
45	24-20254	SPRING, COMPRESSION - DRIVE SHAFT
46	17-30545	PIN, DRIVE SHAFT
47	88181	SLEEVE, LUBRICATION - DRIVE SHAFT
48	15-92881A1	SHIM, BEARING TO GEAR HOUSING (.002-3-5-10-20)
49	31-8M0166756	ROLLER BEARING ASSEMBLY Comment: TAPERED - DRIVE SHAFT
49A	78654A1	SEAT ASSEMBLY Comment: DRIVE SHAFT - SPLINED NYLON SEAL SEAT ON DRIVE SHAFT
49B	86304	SEAL, SPLINED - DRIVE SHAFT

▶GEAR HOUSING ASSEMBLY, COMPLETE (SERIAL GROUP NO. 7)(PAGE 2) (34 parts)

Ref	OEM Part #	Part Name
-	27-72486A32	GASKET SET
1	1643-9539T1	GEAR HOUSING ASS'Y Comment: UNITED STATES 5193259 AND UP AUSTRALIA 8057395 AND UP BELGIUM 9217256 AND UP
51	760394	CAM, SHIFT Comment: UNITED STATES 5193259 AND UP AUSTRALIA 8057395 AND UP BELGIUM 9217256 AND UP
52	38441	FOLLOWER, CAM
53	20843	SLIDE, CROSS PIN
54	24-39845	SPRING, COMPRESSION - CAM FOLLOWER
55	15-38374A1	SHIM, BEARING CUP TO GEAR HOUSING (.002-3-5-10)
56	31-38356A1	TAPERED ROLLER BEARING ASSEMBLY
57	31-21739	BEARINH, ROLLER - FORWARD GEAR
58	43-55608T4	FORWARD GEAR ASSEMBLY
59	52-92911T	RATCHET, SLIDING CLUTCH
60	17-8M0020942	PIN, CROSS - RATCHET TO PROPELLER SHAFT
61	24-38114	SPRING, RETAINING - CROSS PIN
62	44-75365	SHAFT, PROPELLER
63	43-79158T	REVERSE GEAR ASSEMBLY
65	12-32004	WASHER, THRUST - REVERSE GEAR
66	30-20839T	BEARING, BALL - REVERSE GEAR
67	25-31986	"O" RING, BEARING CARRIER
68	69386T1	BEARING CARRIER ASSEMBLY
69	31-21700	BEARING, ROLLER - BEARING CARRIER
70	26-8M0205511	OIL SEAL, BEARING CARRIER
71	26-8M0203757	OIL SEAL, BEARING CARRIER
72	28-30281	KEY, LOCATING - BEARING CARRIER
73	14-53012	TAB WASHER, GEAR HOUSING COVER
74	11-87763	COVER, GEAR HOUSING
75	97-31640Q4	TRIM TAB ASSEMBLY, GEAR HOUSING
76	10-66024	SCREW, TRIM TAB TO GEAR HOUSING
77	12-8M0214963	WASHER, DRIVE SHAFT HOUSING STUD (3/8")
78	11-8M0204726	NUT, DRIVE SHAFT HOUSING STUD (3/8")
79	12-65791	WASHER Comment: DRIVE SHAFT HOUSING TO GEAR HOUSING STUD (7/16")
80	11-8M0204653	NUT Comment: DRIVE SHAFT HOUSING TO GEAR HOUSING STUD (7/16")
81	73345A1	THRUST HUB, FRONT
84	14-8M0214942	TAB WASHER, PROPELLER
85	11-69578Q1	NUT, PROPELLER

▶MISCELLANEOUS PARTS/ACCESSORIES (1 parts)

Ref	OEM Part #	Part Name
-	37-43198A84	DECAL SET - SERIAL GROUP #11

▶OVERSIZE PISTON AND RING (1 parts)

Ref	OEM Part #	Part Name
--	39-28616A12	RING, PISTON (.015 OVERSIZE)

▶PROPELLERS (1 parts)

Ref	OEM Part #	Part Name
-	48-73144A45	PROPELLER ASSEMBLY (ALUMINUM)(PITCH 17") Comment: 3 BLADES SERIAL GROUP #2

▶STARTER HOUSING (MANUAL) (49 parts)

Ref	OEM Part #	Part Name
1	11-20166	NUT, SHEAVE SHAFT (LEFT HAND THREAD)
2	14-61004	TAB WASHER, SHEAVE SHAFT NUT
3	89016A3	HOUSING, STARTER
4	10-90073	SCREW Comment: STARTER HOUSING TO CRANKCASE/CYLINDER BLOCK (1")
5	13-20202	LOCKWASHER, STARTER HOUSING SCREW
6	37691	PLATE, CABLE GUIDE
7	10-358811	SCREW, DRIVE - CABLE GUIDE TO START HOUSING
8	61002	RETAINER, STARTER SPRING
9	24-39502T02	SPRING, STARTER REWIND
10	76053A1	SHEAVE ASSEMBLY
11	23-63100	BUSHING, SPRING GUIDE
12	30596	PAWL, STARTER
13	13-36206	WASHER, WAVE-STARTER PAWL
15	23-63061	SPACER, SHEAVE SHAFT
16	39840	RETAIINER, WAVE WASHER
17	12-57837	WASHER, WAVE WASHER RETAINER
18	13-20160	WASHER, WAVE-RETAINER TENSION
19	24-66853	SPRING, RETAINER PLATE TO STARTER SHEAVE
19A	66848	RETAINER, SPRING
20	66845	PLATE, RETAINER-STARTER PAWL
21	12-57860	WASHER, WEAR-SHEAVE SHAFT
22	61003	SHAFT, SHEAVE
23	47341A11	STARTER CABLE Comment: (FOR MANUAL STARTING OF ELECTRIC ENGINE)
24	28747	HANDLE, STARTER CABLE Comment: UNITED STATES 4962055 AND BELOW AUSTRALIA 8053229 AND BELOW BELGIUM 9195685 AND BELOW CANADA 7115572 AND BELOW
24&25	79470A1	HANDLE AND RETAINER ASSEMBLY Comment: STARTER CABLE UNITED STATES 4962056 AND UP AUSTRALIA 8053230 AND UP BELGIUM 9195686 AND UP CANADA 7115573 AND UP
25	79470A1	RETAINER, STARTER CABLE AND HANDLE
26	70969	CABLE, INTERLOCK Comment: UNITED STATES 4357640 THRU 4705992 AUSTRALIA 8030090 THRU 8044724 BELGIUM 9107214 THRU 9155279 CANADA 7068998 THRU 7097572
27	10-32228	SCREW Comment: INTERLOCK CABLE TO EXHAUST PLATE (5/8")
28	10-69022	SCREW Comment: INTERLOCK CABLE TO STARTER HOUSING (1/2")
29	13-27660	LOCKWASHER, INTERLOCK CABLE SCREW
30	12-26013	WASHER, INTERLOCK CABLE SCREW
31	57236	CAM, SLIDING-STARTER HOUSING
32	24-70086	SPRING, SLIDING CAM
33	12-37998	WASHER, INTERLOCK CABLE
34	18-26953	COTTER PIN, INTERLOCK CABLE TO SLIDING CAM
35	65757A1	TOGGLE ASSEMBLY, STARTER INTERLOCK
36	10-57249	SCREW, TOGGLE TO STARTER HOUSING
37	23-26856	BUSHING, TOGGLE SCREW
38	24-57279	SPRING, TOGGLE SCREW
39	76568	CABLE Comment: INTERLOCK ALSO USED ON TILLER HANDLE MODELS
40	10-69022	SCREW, CABLE (1/2") Comment: ALSO USED ON TILLER HANDLE MODELS
41	12-26013	WASHER, CABLE SCREW Comment: ALSO USED ON TILLER HANDLE MODELS
42	428201	CAM, INTERLOCK Comment: UNITED STATES 4962056 AND UP AUSTRALIA 8053230 AND UP BELGIUM 9195686 AND UP CANADA 7115573 AND UP
43	10-76138	SCREW, INTERLOCK CAM ATTACHING (1 1/8")
44	24-761401	SPRING, INTERLOCK CAM SCREW
45	79371	ACTUATOR, INTERLOCK
46	10-76137	SCREW, INTERLOCK SCTUATOR ATTACHING (1 5/8")
47	24-76139	SPRING, INTERLOCK ACTUATOR SCREW
48	18-26811	COTTER PIN, INTERLOCK CABLE TO ACTUATOR

▶STEERING HANDLE ASSEMBLY (48 parts)

Ref	OEM Part #	Part Name
-	78551A5	STEERING HANDLE ASSEMBLY
--	52148A1	CO-PILOT ASSEMBLY
1	48405A2	ARM, STEERING HANDLE
2	12-69056	WASHER, STEERING HANDLE ARM
3	11-826709109	NUT, STEERING HANDLE ARM
5	58192A1	GRIP, STEERING HANDLE ARM
6	48416	CAP, STEERING HANDLE GRIP
7	48519	PLATE, COVER - DRIVE WHEEL
8	27-48518	GASKET, COVER PLATE
9	10-72169	SCREW Comment: DRIVE WHEEL COVER PLATE FASTENING (1/2")
10	48414	HOUSING Comment: DRIVE WHEEL - STEERING ARM HANDLE
11	48516A1	DRIVE WHEEL AND ROD ASSEMBLY
12	48520	CABLE, THROTTLE
13	785511	CONDUIT, CABLE
14	89613	CONNECTOR, CONTROL LINKAGE
15	8M0026078	TUBE, THROTTLE CABLE GUIDE
15A	10-824081	SCREW, SET - THROTTLE CABLE GUIDE TUBE
16	8M0204660	GUIDE, THROTTLE CABLE
17	20007	ANCHOR, THROTTLE CABLE
18	10-8M0204644	SCREW, THROTTLE CABLE ANCHOR
19	485681	SHIFT LEVER
20	98530	KNOB, SHIFT LEVER
21	23-48475	BUSHING, NYLON - SHIFT ROD (1/4"I.D.)
22	12-35950	WASHER, SHIFT ROD
23	18-25191	COTTER PIN, SHIFT ROD
24	8128061	ROD, SHIFT
25	48419T	ROD END, SHIFT ROD
26	78812A1	DETENT, SHIFT LEVER
27	10-48409	SCREW Comment: SHIFT LEVER DETENT TO STEERING HANDLE BRACKET
28	23-48237	BUSHING, NYLON - SHIFT LEVER (3/8"I.D.)
29	12-37828	WASHER, SHIFT LEVER
30	11-8M0204726	NUT, SHIFT LEVER TO STEERING HANDLE BRACKET
31	48404T8	BRACKET, STEERING HANDLE
32	48416	CAP, STEERING HANDLE BRACKET
33	10-823597	SCREW HANDLE BRACKET TO STEERING HANDLE
34	12-48477	WASHER, STEERING HANDLE BRACKET (.505 I.D.)
35	12-48526	WASHER Comment: NYLON - STEERING HANDLE BRACKET (.630 I.D.)
36	23-28919	BUSHING Comment: NYLON - STEERING HANDLE BRACKET (5/8" I.D.)
37	23-48525	SPACER, STEERING HANDLE BRACKET
38	12-38000	WASHER Comment: NYLON - STEERING HANDLE BRACKET (1 35/64" O.D.)
39	13-48478	WAVE WASHER, STEERING HANDLE BRACKET
40	12-49636	WASHER Comment: NYLON - STEERING HANDLE BRACKET (1 3/4" 0.D.)
41	11-82671317	NUT, STEERING HANDLE BRACKET SCREW
43	45064	COVER, BOTTOM COWL - SHORTING SWITCH
44	19-35827	PLUG, BOTTOM COWL - SHORTING SWITCH HOLE
45	11-30428	FASTENER, PLUG TO BOTTOM COWL
46	10-35786	SCREW, BRACKET TO ENGINE (1")
47	14-43589	TAB WASHER, BRACKET SCREW

▶SWIVEL BRACKET ASSEMBLY (20 parts)

Ref	OEM Part #	Part Name
1	1490-8599A6	SWIVEL BRACKET ASSEMBLY (LONG SHAFT)
2	26-32911	OIL SEAL, SWIVEL BRACKET
3	10-47828	SCREW, DRIVE - SWIVEL BRACKET
4	22-8M0169589	FITTING, GREASE
4A	26-22734	OIL SEAL, SWIVEL BRACKET Comment: UNITED STATES 5193259 AND UP AUSTRALIA 8057395 AND UP BELGIUM 9217256 AND UP
5	69540A4	SWIVEL PIN ASS'Y (LONG SHAFT)
6	30711	BUMPER, STEERING ARM
7	10-33986	BOLT, UPPER MOUNT TO SWIVEL PIN (5 1/4")
8	12-47606	WASHER, SWIVEL PIN - LOWER
9	76535T	BRACKET, RIDE-GUIDE ATTACHING Comment: UNITED STATES 4357640 THRU 4576236 AUSTRALIA 8030090 THRU 8042649 BELGIUM 9107214 THRU 9136249 CANADA 7068998 THRU 7088597
9A	76535T	BRACKET, RIDE-GUIDE ATTACHING Comment: UNITED STATES 4576237 AND UP AUSTRALIA 8042650 AND UP BELGIUM 9136250 AND UP CANADA 7088598 AND UP
10	16-39781	STUD, BRACKET TO STEERING ARM (1 1/4")
11	11-8M0204726	NUT, BRACKET STUD
12	10-34352	SCREW, BRACKET TO STEERING ARM (7/8")
13	76533	STRAP, BRACKET SCREW
14	17-25598	PIN, REVERSE LOCK SPRING ATTACHING
15	12-26837	WASHER, SWIVEL PIN TO BOTTOM YOKE (.065)
16	77416T1	YOKE, BOTTOM Comment: UNITED STATES 4962056 AND UP AUSTRALIA 8053230 AND UP BELGIUM 9195686 AND UP CANADA 7115573 AND UP
17	11-71956	NUT, BOTTOM YOKE
17A	53-77415	RETAINING RING, BOTTOM YOKE

▶THROTTLE CONTROL LINKAGE AND SPARK ADVANCE (40 parts)

Ref	OEM Part #	Part Name
1	72040T	BRACKET, THROTTLE ACTUATOR
2	10-53576	SCREW, THROTTLE ACTUATOR BRACKET (1 1/8")
3	13-8M0204647	LOCKWASHER Comment: THROTTLE ACTUATOR BRACKET SCREW
4	815603A1	ACTUATOR, THROTTLE
5	10-21449	SCREW, BRACKET TO THROTTLE ACTUATOR (2")
6	12-25893	WASHER, BRACKET SCREW
7	13-62172	WAVE WASHER, BRACKET SCREW
8	11-29250	NUT, BRACKET SCREW
9	57440	SWIVEL, LINK ROT TO THROTTLE ACTUATOR
10	72043	LINK ROD
11	57440	SWIVEL, LINK ROD TO THROTTLE ARM
12	76560	ARM, THROTTLE Comment: UNITED STATES 4576237 AND UP AUSTRALIA 8042650 AND UP BELGIUM 9136250 AND UP CANADA 7088598 AND UP
13	815607A1	LEVER, SPARK ADVANCE Comment: UNITED STATES 4576237 AND UP AUSTRALIA 8042650 AND UP BELGIUM 9136250 AND UP CANADA 7088598 AND UP
14	10-818165	SCREW Comment: LEVER AND ARM TO CYLINDER BLOCK (1 3/4")
15	23-55164	BUSHING, LEVER AND ARM SCREW
16	23-55171	BUSHING, LEVER AND ARM SCREW
17	24-55162	SPRING, RETURN - SPARK ADVANCE LEVER
18	12-68410	WASHER, LEVER AND ARM SCREW
19	39483	LATCH, THROTTLE ARM (THROTTLE CABLE)
20	10-69026	SCREW, LATCH TO THROTTLE ARM (7/8")
21	24-20099	SPRING, COMPRESSION - LATCH SCREW
22	11-826709109	NUT, LATCH SCREW
23	76056	LINK ROD Comment: SPARK ADVANCE (2 1/2" LONG) MEASURE LENGTH OF LINK ROD TO INSURE ORDERING CORRECT PART.
24	77013A1	SWIVEL, LINK ROD TO SPARK ADVANCE LEVER
24A	13-29402	WAVE WASHER, SWIVEL
25	23-26856	BUSHING, LINK ROD SWIVEL
26	12-73288	WASHER, LINK ROD SWIVEL
27	11-45774	NUT, LINK ROD SWIVEL
28	61939	PIVOL, THREADED - LINK ROD TO TRIGGER
29	66778T	PLATE, THROTTLE ACTUATOR
30	10-46420	SCREW, PLATE TO THROTTLE ACTUATOR (1/2")
31	10-23702	SCREW, ADJUSTING - PLATE (1 1/8") Comment: UNITED STATES 4576237 AND UP AUSTRALIA 8042650 AND UP BELGIUM 9136250 AND UP CANADA 7088598 AND UP
32	11-68219	NUT, ADJUSTING SCREW
33	48039	CAP, ADJUSTING SCREW
34	10-25158	SCREW, ADJUSTING - THROTTLE ARM (1 3/4") Comment: UNITED STATES 4576237 AND UP AUSTRALIA 8042650 AND UP BELGIUM 9136250 AND UP CANADA 7088598 AND UP
35	11-68219	NUT, ADJUSTING SCREW Comment: UNITED STATES 4576237 AND UP AUSTRALIA 8042650 AND UP BELGIUM 9136250 AND UP CANADA 7088598 AND UP
36	48039	CAP, ADJUSTING SCREW Comment: UNITED STATES 4576237 AND UP AUSTRALIA 8042650 AND UP BELGIUM 9136250 AND UP CANADA 7088598 AND UP
37	10-25158	SCREW Comment: ADJUSTING - SPARK ADVANCE LEVER (1 3/4") UNITED STATES 4576237 AND UP AUSTRALIA 8042650 AND UP BELGIUM 9136250 AND UP CANADA 7088598 AND UP
38	11-68219	NUT, ADJUSTING SCREW Comment: UNITED STATES 4576237 AND UP AUSTRALIA 8042650 AND UP BELGIUM 9136250 AND UP CANADA 7088598 AND UP
39	48039	CAP, ADJUSTING SCREW Comment: UNITED STATES 4576237 AND UP AUSTRALIA 8042650 AND UP BELGIUM 9136250 AND UP CANADA 7088598 AND UP

▶TOP COWL ASSEMBLY (39 parts)

Ref	OEM Part #	Part Name
1	2153-7937A8	TOP COL (ELECTRIC)
2	55455	HOOK, TOP COWL ALTCH - REAR
3	10-22956	SCREW, REAR HOOK TO TOP COWL (7/8")
4	13-26992	LOCKWASHER, REAR HOOK MOUNTING SCREW
5	37690	SHIELD, REAR - TOP COWL
6	10-37370	SCREW, REAR SHIELD TO TOP COWL
7	13-37371	LOCKWASHER, REAR SHIELD SCREW
8	55459A5	RETAINER ASSEMBLY, TOP COWL
9	35496	PAD, BUMPER - TOP COWL RETAINER
10	10-35386	SCREW, RETAINER TO TOP COW (1")
11	13-39107	LOCKWASHER, RETIANER TO TOP COWL SCREW
12	94918F1	LEVER, COWL LATCH HINGE
13	52739	HINGE, COWL LATCH - TOP COWL
14	17-58998	PIN, COWL LATCH LEVER TO HINGE
15	25-20116	GROMMET, CHOKE KNOB - TOP COWL (MANUAL)
16	720201	BRACKET, REAR COWL SUPPORT
18	60577	MOUNT, RUBBER - REAR SUPPORT BRACKET
19	12-69056	WASHER, REAR SUPPORT BRACKET RUBBER MOUNT
20	11-29598	NUT, REAR SUPPORT BRACKET RUBBER MOUNT
21	99150A5	BRACKET ASSEMBLY, FRONT SUPPORT
22	31014	MOUNT, RUBBER - FRONT SUPPORT BRACKET
23	13-26992	LOCKWASHER Comment: FRONT SUPPORT BRACKET RUBBER MOUNT
24	11-29598	NUT, FRONT SUPPORT BRACKET RUBBER MOUNT
25	10-37562	SCREW Comment: FRONT SUPPORT BRACKET TO BOTTOM COWL (1")
26	58124A20	SWITCH ASSEMBLY, MERCURY
27	10-69235	SCREW, SWITCH TO FRONT BRACKET (1/2")
28	86-45915	TERMINAL BLOCK
29	10-20411	SCREW Comment: TEMRINAL BLOCK TO FRONT BRACKET (5/8")
30	10-69079	SCREW, HARNESS LEADS ATTACHING (1/2")
31	17-36242	ROLL PINE, MERCURY SWITCH
32	87-74605A4	SWITCH ASSEMBLY Comment: NEUTRAL START USE WITH TILLER HANDLE MODELS
33	10-64332	SCREW, SWITCH TO FRONT BRACKET
34	11-24832	NUT, SWITCH SCREW
35	97411	ACTUATOR, INTERLOCK
36	24-88099	SPRING, INTERLOCK ACTUATOR
37	10-37892	SCREW, ACTUATOR TO FRONT BRACKET
38	12-22887	WASHER, ACTUATOR SCREW
39	23-88100	SPACER, ACTUATOR SCREW
40	11-859124	NUT, ACTUATOR SCREW

100-Hour / Annual Service Checklist

Regular maintenance keeps your Mercury 500, 50 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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