Mercury 650 (4 CYL.) (1542745 THRU 1765043) Parts & Diagrams

🔎 Mercury 650 (4 CYL.) Reference Library — Exploded parts diagrams (19 diagrams), specifications, common issues, and maintenance checklist.

The Mercury 650 (4 CYL.) is a 4-Stroke, Inline 4-Cylinder, EFI, SOHC outboard motor. Suited for bay boats, pontoons, and center-console fishing boats requiring reliable mid-range power.

Quick Reference Specifications

Specification	Value
Engine Type	4-Stroke, Inline 4-Cylinder, EFI, SOHC
Horsepower	65 HP
Displacement	2100 cc
Bore x Stroke	90 mm x 81 mm
Spark Plug (Type & Gap)	NGK IZFR6F-11
Engine Oil Capacity	5.2 L (5.5 quart)
Recommended Engine Oil	Mercury FourStroke Oil 10W-30
Gear Case Oil Capacity	—
Idle Speed (in gear)	650 ± 25 RPM (in gear)
Full Throttle RPM Range	4500-5500
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 650 (4 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 650 (4 CYL.).

▶BOTTOM COWL ASSEMBLY (49 parts)

Ref	OEM Part #	Part Name
1	186-1781A2	BOTTOM COWL ASSEMBLY
2	19-824928001	PLUG, HOLE - BOTTOM COWL (TO PLUG 3/4" HOLE IN BOTTOM COWL)
3	29997A1	TRIM MOULDING ASSEMBLY
4	29998	SPLICER, TRIM MOUNDING - REAR
5	10-29226	SCREW, DECORATIVE - MOULDING TO BOTTOM COWL
6	12-24671	WASHER, FIBER - MOULDING FASTENING SCREW
7	11-29225	NUT, NYLON CAP - MOULDING FASTENING SCREW
8	13-26995	LOCKWASHER, MOULDING FASTENING SCREW
9	11-26419	NUT, BRASS - MOULDING FASTENING SCREW
10	30005	BAFFLE, BOTTOM COWL
11	10-21106	SCREW, BAFFLE TO BOTTOM COWL
12	33016	BRACKET, RECTIFIER MOUNTING
13	10-21091	SCREW, BRACKET TO BOTTOM COWL (1 1/8")
14	10-56500	SCREW, BRACKET TO BOTTOM COWL ( 1 1/4")
15	11-8M0207775	NUT, RECTIFIER BRACKET MOUNTING SCREW
16	30003	BRACKET, PIVOT PIN TO BOTTOM COWL
17	17-30004	PIN, PIVOT - BOTTOM COWL
18	11-20696	NUT, PIVOT PIN FASTENING
19	27-29914	GASKET, POWERHEAD TO BOTTOM COWL
20	10-76621	SCREW, BOTTOM COWL TO DRIVE SHAFT HOUSING
21	20557	BRACKET, CABLE END ANCHOR
22	10-29200	SCREW, ANCHOR BRACKET TO BOTTOM COWL
23	29532	LEVER, THROTTLE CONTROL
24	30612	LEVER, SHIFT CONTROL
25	23-29529	BUSHING, THROTTLE AND SHIFT LEVER
26	10-47273	SCREW, THROTTLE AND SHIFT LEVER FASTENING
27	12-8M0042641	WASHER, THROTTLE AND SHIFT LEVER FASTENING SCREW
28	17-30978A1	PIN ASSEMBLY, CLEVIS YOKE
29	17-239281	ROLL PIN, CLEVIS YOKE PIN
30	10-20584	SCREW, CLEVIN PIN AND FASTENING
31	13-29402	WASHER, WAVE - PIN FASTENING SCREW
32	11-8M0204718	NUT, PIN FASTENING SCREW
33	30789A1	SHIFT SHAFT ASSEMBLY, UPPER
34	27714	ROD (SLEEVE), SHIFT CONTROL END
35	11-25168	NUT, SHIFT SHAFT END ADJUSTING
36	30630	ROD, LINK - SHIFT SHAFT END
37	18-25191	COTTER PIN, LINK ROD TO SHIFT SHAFT
38	12-20583	WASHER, LINK ROD
39	24-30621	SPRING, DETENT
40	10-98256	SCREW, DETENT SPRING TO BOTTOM COWL
41	12-69057	WASHER, DETENT SPRING SCREW
42	11-8M0207775	NUT, DETENT SPRING SCREW
43	22-291112	NIPPLE, MAGNETO VENT TUBE Comment: 2 ELBOWS (22-25885) WERE USED ON LATER PRODUCTION ENGINES
44	22-996642	ELBOW, MAGNETO VENT TUBE Comment: 2 ELBOWS (22-25885) WERE USED ON LATER PRODUCTION ENGINES
45	32-8M0108355	TUBE, VENT - MAGNETO OUTLET (10 1/2")
46	30238	SUPPORT, EXTERNAL WIRING HARNESS
47	10-26066	SCREW, HARNESS SUPPORT TO BOTTOM COWL
48	12-20084	WASHER, HARNESS SUPPORT FASTENING SCREW
49	11-29250	NUT, HARNESS SUPPORT FASTENING SCREW

▶CARBURETOR ASSEMBLY (37 parts)

Ref	OEM Part #	Part Name
--	1395-92621	REPAIR PARTS KIT (1 PER CARBURETOR)
1	1335-2088	CARBURETOR ASSEMBLY, COMPLETE (KC-2A)
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 SEAL
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	1399-4791A1	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 Comment: USE ON LOWER CARBURETOR ONLY -- REPLACED WITH 33148 CLUSTER ON UPPER CARBURETOR
20	1399-2012	SHAFT, THROTTLE
21	1399-2178	TUBE, IDLE
22	27-23180	GASKET, IDLE TUBE
23	10-23035	SCREW AND LOCKWASHER, THROTTLE SHUTTER
24	1399-2180	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	1399-1467	JET, MAIN FUEL (.067)
30	27-28409	GASKET, MAIN FUEL JET
31	1399-2179	NOZZLE, MAIN
32	10-28846	SCREW, PLUG - MAIN NOZZLE
33	24-20869	SPRING, THROTTLE SHAFT RETURN (UPPER CARBURETOR)
34	19-32299	WELCH PLUG, BODY CHANNEL
35	27-31402	GASKET, CARBURETOR FLANGE
36	11-29250	NUT, CARBURETOR MOUNTING STUD

▶CARBURETOR LINKAGE AND CHOKE SOLENOID (37 parts)

Ref	OEM Part #	Part Name
1	29690	CHOKE SOLENOID, TOP COWL
2	30050	TERMINAL, CHOKE SOLENOID LEAD
3	23-33018	SPACER, CHOKE SOLENOID SCREW
4	10-33024	SCREW, CHOKE SOLENOID TO TOP COWL (1 1/4")
5	13-26991	LOCKWASHER, CHOKE SOLENOID SCREW
6	10-24770	SCREW, CHOKE SOLENOID TO TOP COWL ( 1 3/8")
7	13-26992	LOCKWASHER, CHOKE SOLENOID SCREW
8	397-421A2	GROUND STRAP ASSEMBLY, CHOKE SOLENOID TO ADAPTOR
9	54-648552	CLIP, CHOKE SOLENOID WIRE
10	8M0084613	"D" WASHER, WIRE CLIP FASTENING SCREW
11	10-24239	SCREW, WIRE CLIP TO TOP COWL
12	54-22783	"S" CLIP, CHOKE SOLENOID WIRE TO TOP COWL
13	48315A4	PLUNGER AND LINK ASSEMBLY, CHOKE SOLENOID
14	12-30164	WASHER, PLUNGER AND LINK
15	18-26953	COTTER PIN, LINK TO UPPER CHOKE LEVER
16	90242A1	KNOB, CHOKE ROD
17	25-20116	GROMMET, CHOKE ROD
18	22462	"U" LINK, CHOKE KNOB TO CHOKE ROD
19	10-69022	SCREW, "U" LINK TO CHOKE KNOB
20	13-26996	LOCKWASHER, "U" LINK SCREW
21	18-26953	COTTER PIN, "U" LINK TO CHOKE ROD
22	47804	SHUTTER, CHOKE - CARBURETOR
23	23-30438	BUSHING, NYLON - UPPER CHOKE SHUTTER
24	33003	ROD, CHOKE
25	17-25391	RIVET, CHOKE SHUTTER TO CHOKE ROD
26	16-30172	STUD, CARBURETOR - CHOKE SHUTTER PIVOT
27	12-30164	WASHER, CHOKE SHUTTER CARBURETOR STUD
28	11-20110	NUT, CHOKE SHUTTER TO CARBURETOR STUD
29	24-32428	SPRING, TENSION - CHOKE ROD 1
30	10-657461	STUD, CHOKE ROD SPRING TO CARBURETOR
31	23-32427	SPACER, CHOKE ROD SPRING STUD
32	11-8M0207775	NUT, CHOKE ROD SPRING TO CARBURETOR STUD
33	74371	CLUSTER, THROTTLE LEVER (UPPER CARBURETOR)
34	1395-6027	SCREW, CLUSTER TO THROTTLE LEVER
35	1335-2088	CARBURETOR ASSEMBLY, COMPLETE
36	53649A2	THORTTLE PICK-UP BRACKET ASSEMBLY
37	10-29239	SCREW, THROTTLE BRACKET MOUNTING

▶CLAMP AND SWIVEL BRACKET ASSEMBLY (52 parts)

Ref	OEM Part #	Part Name
1	1440-3296A1	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 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	11-22053	NUT, CLAMP BRACKET STUD
12	17-8M0026068	TILT LOCK PIN ASSEMBLY
13	32-28052	SLEEVE, RUBBER - TILT LOCK PIN BUMPER 1
14	1453-2688A1	SWIVEL BRACKET ASSEMBLY
15	22-69059	FITTING, GREASE
16	26-31783	OIL SEAL
17	19-77633Q	LUBRICAP, SWIVEL BRACKET GREASE FITTING
18	17-25598	PIN, REVERSE LOCK SPRING ATTACHING
19	17-31772A1	SWIVEL PIN AND TOP YOKE ASSEMBLY
20	28203	BUMPER, TOP YOKE
21	10-30453	BOLT, TOP YOKE TO UPPER MOUNT
22	11-8M0204653	NUT, TOP YOKE BOLT FASTENING
23	12-31815	WASHER, SWIVEL PIN - LOWER (TOP WASHER OPTIONAL)
24	31234	BOOT, RUBBER - UPPER SHIFT SHAFT
25	38-56267	SERIAL PLATE
26	10-25612	SCREW, DRIVE - SERIAL PLATE TO SWIVEL BRACKET
27	28205T	STRAP STOP, DRIVE SHAFT HOUSING TO SWIVEL BRACKET
28	10-28200	SCREW, STRAP STOP TO DRIVE SHAFT HOUSING
29	11-25269	NUT, STRAP STOP FASTENING SCREW
30	31775	YOKE, BOTTOM
31	11-71956	NUT, SWIVEL PIN RETAINING
32	24-29821	SPRING, REVERSE LOCK TENSION
33	26903A4	REVERSE LOCK ASSEMBLY
34	56349	SHAFT, REVERSE LOCK PIVOT
35	18-45882	COTTER PIN, REVERSE LOCK TO SHAFT
36	30126A1	TILT STOP LEVER ASSEMBLY
37	10-30128	SCREW, TILT STOP LEVER ANCHOR
38	13-31030	WASHER, WAVE - LEVER ANCHOR SCREW
39	11-29250	NUT, LEVER ANCHOR SCREW
40	55-28416	PIN, UPPER SHOCK MOUNTING
41	23-28199	SPACER, UPPER SHOCK BUSHING TO CLAMP BRACKET
42	12-28196	WASHER, UPPER BUSHING RETAINER (INNER)
43	12-8M0204648	WASHER, UPPER AND LOWER BUSHING RETAINER (OUTER)
44	10-28450	SCREW, NYLOCK - UPPER AND LOWER SHOCK MOUNTING PIN
45	55-58780A7	SHOCK ABSORBER
46	23-28198	BUSHING, RUBBER - SHOCK ABSORBER (LOWER)
47	23-32171	BUSHING, RUBBER - SHOCK ABSORBER (UPPER)
48	55-696531	PIN, LOWER SHOCK MOUNTING
49	12-8M0204695	WASHER, LOWER BUSHING RETAINER (INNER)
50	10-68298	BOLT, CLAMP BRACKET TO BOAT TRANSOM
51	12-68410	WASHER, CLAMP BRACKET BOLT
52	11-82670912	NUT, CLAMP BRACKET BOLT

▶COWLING AND FRONT COVER (650E) (24 parts)

Ref	OEM Part #	Part Name
--	92-271091	ADHESIVE COMPOUND (3 1/2 OUNCE KIT) EMBLEM FASTENING
1	2182-7927A8	COWL FRONT COVER ASSEMBLY
2	26183A5	EMBLEM, FRONT COVER
3	10-29226	SCREW, BRACKET TO FRONT COVER
4	13-26995	LOCKWASHER, BRACKET FASTENING SCREW
5	11-26419	NUT, BRACKET FASTENING SCREW
6	29345	BUMPER, RUBBER-FRONT COVER BRACKET
7	56848	KNOB, COWL FRONT COVER FASTENING
8	12-30771	WASHER, COVER FASTENING KNOB (RUBBER)
9	12-26825	WASHER, COVER FASTENING KNOB (STEEL)
10	24-30772	SPRING, TENSION-FASTENING KNOB
11	17-29077	ROLL PIN, TENSION SPRING TO KNOB
12	33551	BLANKET, SOUND ABSORBING-FRONT COVER
13	31095	STRIP, SOUND ABSORBING
14	2110-2383A2	WRAP AROUND COWL ASSEMBLY
15	46785A1	HANDLE, COWL LATCH
16	53-21058	"E" RING, COWL LATCH HINGE PIN
17	17-21057	PIN, HINGE-COWL LATCH HANDLE
18	46785A1	SWIVEL, COWL LATCH
19	30413	HOOK, COWL LATCH FASTENING
20	31935	BLANKET, SOUND ABSORBING-WRAP AROUND COWL
21	37-56433A2	DECAL, WRAP AROUND COWL - PORT
22	37-56433A2	DECAL, WRAP AROUND COWL - STARBOARD
23	37-56433A2	DECAL, WRAP AROUND COWL - REAR

▶COWLING AND FRONT COVER (650E-1) (21 parts)

Ref	OEM Part #	Part Name
--	92-86166Q1	GLUE, ADHESIVE - SOUND BLANKET FASTENING
1	2182-7927A8	COWL FRONT COVER ASSEMBLY
2	37-37844	DECAL, "MERC 650"
3	37-37838	DECAL, FRONT COVER EMBLEM
4	56849	KNOB, COWL FRONT COVER FASTENING
5	12-30771	WASHER, COVER FASTENING KNOB (RUBBER)
6	12-27129	WASHER, COVER FASTENING KNOB (STEEL)
7	24-30772	SPRING, TENSION - COVER FASTENING KNOB
8	17-29077	ROLL PIN TENSION SPRING TO KNOB
9	38674	BLANKET, SOUND ABSORBING - FRONT COVER
10	31095	STRIP, SOUND - LOWER SECTION
11	35552	SEAL, SOUND - UPPER SECTION
12	2110-2383A2	WRAP AROUND COWL ASSEMBLY
13	46785A1	HANDLE, COWL LATCH
14	17-21057	PIN, HANGE - 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
18	37-56433A2	DECAL, WRAP AROUND COWL - STARBOARD
19	37-56433A2	DECAL, WRAP AROUND COWL - PORT
20	31935	BLANKET, SOUND ABSORBING - WRAP AROUND COWL

▶CRANKSHAFT, PISTON AND CONNECTING ROD (29 parts)

Ref	OEM Part #	Part Name
--	39-33945	RING, PISTON (.015) Comment: OVERSIZE PISTON AND RING
1	418-3249A3	CRANKSHAFT
2	28-45554	KEY, FLYWHEEL DRIVE
3	533-2761A3	MAIN BEARING ASSEMBLY (VALVE TYPE)
4	17-20032	DOWEL PIN, MAIN BEARING
5	10-25313	SCREW, MAIN BEARING CLAMPING
6	11-29469	NUT, MAIN BEARING CLAMPING SCREW
7	34-32203A1	REED SET, MATCHED - MAIN BEARING
8	34-64632	REED STOP, MAIN BEARING REED VALVES
9	10-77280	SCREW, REED STOP MOUNTING
10	11-29469	NUT, REED STOP MOUNTING SCREW
11	531-1884A3	CENTER MAIN BEARING ASSEMBLY
12	17-20032	DOWEL PIN, CENTER MAIN BEARING
13	29-714221	BEARING, NEEDLE
14	26113T	RACE, OUTER (PAIR)
15	53-26933	RING, SNAP - OUTER RACE CLAMPING
16	10-22968	SCREW, CENTER MAIN BEARING CLAMPING
17	11-8M0207775	NUT, MAIN BEARING CLAMPING SCREW
18	17-31245	DOWEL PIN (STEPPED)
19	25-8M0214919	"O" RING, DRIVE SHAFT SPLINE
20	732-2735A2	PISTON AND PISTON PIN ASSEMBLY
21	40-32118	LOCK RING, PISTON PIN
22	39-32921	RING, PISTON
23	611-1885A4	CONNECTING ROD AND CAP ASSEMBLY
24	10-45379	SCREW, CAP TO CONNECTING ROD
25	11-20061	NUT, CONNECTING ROD SCREW
26	29-47897	BEARING, NEEDLE - CRANKPIN
27	29-39656	BEARING, NEEDLE - PISTON PIN
28	12-29681	WASHER, NEEDLE LOCATING

▶CYLINDER BLOCK AND CRANKCASE ASSEMBLY (61 parts)

Ref	OEM Part #	Part Name
--	12-20084	WASHER, GROUND STRAP AND CRANKCASE SCREW
1	1128-1890A1	END CAP ASSEMBLY, UPPER
2	26-41953	OIL SEAL
3	25-31305	"O" RING
4	30-62567T	BALL BEARING
5	15-31283A1	SHIM, UPPER END CAP TO CRANKCASE (.002-3-5-10)
6	10-30225	SCREW, UPPER END CAP MOUNTING
7	834-2412A3	CYLINDER BLOCK AND CRANKCASE ASSEMBLY
8	23-26348	BUSHING, CRANKCASE - COWL MOUNTING STUD
9	17-20032	DOWEL PIN, CYLINDER BLOCK TO MAIN BEARING
10	17-43044	DOWEL PIN, CRANKCASE TO CYLINDER BLOCK
11	22-328022	PLUG, PIPE - WATER PRESSURE HOLE (CYLINDER BLOCK)
12	16-21831	STUD, CARBURETOR MOUNTING (1 1/4")
13	16-64281	STUD, CRANKCASE TO DRIVE SHAFT HOUSING (1 7/8")
14	16-26134	STUD, CYLINDER BLOCK TO DRIVE SHAFT HOUSING (4 1/16")
15	16-26135	STUD, CYLINDER BLOCK TO DRIVE SHAFT HOUSING (2 5/16")
16	36066A1	EXTENSION, EXHAUST - CYLINDER BLOCK
17	10-29282	SCREW, EXHAUST EXTENSION TO CYLINDER BLOCK (1/4 - 20 X 3/4)
18	10-21449	SCREW, CRANKCASE TO CYLINDER BLOCK (2")
19	10-33008	SCREW, CRANKCASE TO CYLINDER BLOCK (3 1/2")
20	11-29250	NUT, CRANKCASE TO CYLINDER BLOCK SCREW
21	10-36351	SCREW, MAIN BEARING LOCKING
22	14-20091	TAB WASHER, BEARING LOCKING SCREW
23	10-20359	SCREW, CENTER MAIN BEARING LOCKING
24	1126-1751A1	END CAP ASSEMBLY, LOWER
25	21-28481A1	CHECK VALVE ASSEMBLY, END CAP
26	26-29478	OIL SEAL, LOWER
27	26-41953	OIL SEAL, UPPER
28	25-20081	"O" RING
29	30-63742T	BALL BEARING
30	15-20085A1	SHIM, LOWER END CAP TO CRANKCASE (.002-3-5-10)
31	10-30225	SCREW, LOWER END CAP MOUNTING
32	32-8M0108355	TUBE, BALANCE - MAIN BEARING
33	22-996642	ELBOW, BALANCE TUBE TO MAIN BEARING SCREW
34	54-20386	CLAMP, BALANCE TUBE TO ELBOW
35	27-33529	GASKET, CYLINDER BLOCK TO MAINFOLD PLATE
36	37447	PLATE, EXHAUST MANIFOLD
37	27-33530	GASKET, MANIFOLD PLATE TO MAINFOLD COVER
38	30190	COVER, EXHAUST MAINFOLD
39	10-28667	SCREW, MANIFOLD PLATE AND COVER MOUNTING
40	10-28666	SCREW, MANIFOLD PLATE, COVER AND CLAMP MOUNTING
41	12-20028	WASHER, PLATE, COVER AND CLAMP MOUNTING SCREW
42	54-29425	CLAMP, SPARK PLUG LEADS TO COVER
43	30109	GROUND STRAP, CYLINDER BLOCK TO BOTTOM COWL
44	58124A1	SWITCH, MERCURY
45	54-22875	CLAMP, MERCURY SWITCH TO MANIFOLD COVER
46	8M0084613	"D" WASHER, CLAMP FASTENING SCREW
47	10-28708	SCREW, MERCURY SWITCH TO MANIFOLD COVER
48	27-33015	GASKET, CYLINDER BLOCK COVER
49	1012-2077A1	CYLINDER BLOCK COVER ASSEMBLY
50	23-26348	BUSHING, COVER - COWL MOUNTING STUD
51	10-21091	SCREW, CYLINDER BLOCK COVER MOUNTING
52	11-8M0207775	NUT, COVER MOUNTING SCREW
53	27-31304	GASKET, TRANSFER PORT COVER
54	31288	COVER, TRANSFER PORT
55	10-20540	SCREW, TRANSFER PORT COVER TO CYLINDER BLOCK (5/8")
56	22-62365A1	CHECK VALVE ASSEMBLY, UPPER - BLEED HOSE
57	21-28481A1	CHECK VALVE ASSEMBLY
58	32-9912688	HOSE, CYLINDER BLEED (8 1/2")
59	22-67902	CONNECTOR, LOWER - BLEED HOSE
60	54-20387	CLAMP, BLEED HOSE TO CHECK VALVE AND CONNECTOR

▶DRIVE SHAFT HOUSING ASSEMBLY (52 parts)

Ref	OEM Part #	Part Name
1	1540-2384A2	DRIVE SHAFT HOUSING ASSEMBLY
2	16-56295	STUD, DRIVE SHAFT HOUSING TO GEAR HOUSING
3	35638A1	COVER, TRIM - DRIVE SHAFT HOUSING
3A	35638A1	TRIM COVER ASSEMBLY, DRIVE SHAFT HOUSING
4	10-30742	SCREW, TRIM COVER TO DRIVE SHAFT HOUSING
4A	37-35393	DECAL, TRIM COVER - PORT AND STARBOARD
5	37-31924	DECAL, "FULL GEAR SHIFT" - STARBOARD
5A	10-30742	SCREW, TRIM COVER TO DRIVE SHAFT HOUSING
6	37-31925	DECAL, "FULL GEAR SHIFT" - PORT
7	32-33013	TUBE, WATER INLET
8	26-26207	SEAL, RUBBER - WATER INLET TUBE
9	23-29591	SLEEVE, RUBBER - WATER INLET TUBE
10	27-26198	GASKET, DRIVE SHAFT HOUSING TO BOTTOM COWL
11	12-20086	WASHER, POWERHEAD STUDS
12	11-8M0204726	NUT, POWERHEAD STUDS
13	11-23161	NUT, POWERHEAD STUDS
14	19-32298	PLUG, PLASTIC - WATER PICK-UP SCREW HOLE
15	11-8M0204653	NUT, GEAR HOUSING AND DRIVE SHAFT HOUSING STUDS
16	11-29489	NUT, GEAR HOUSING AND DRIVE SHAFT HOUSING STUDS
17	30721	ROD, PUSH - REVERSE LOCK
18	17-30615	PIN, REVERSE LOCK LEVER
19	24-30618	SPRING, TENSION - PUSH ROD
20	52920	LEVER, REVERSE LOCK
21	12-20546	WASHER, PUSH ROD
22	18-25191	COTTER PIN, PUSH ROD TO REVERSE LOCK
23	30614	BOOT, RUBBER - PUSH ROD
24	31039	RETAINER, PUSH ROD RUBBER BOLT
25	25305	CAP, RUBBER - UPPER MOUNT BOLT NUT
26	11-8M0204653	NUT, UPPER MOUNT BOLT
27	12-30514	WASHER, UPPER MOUNT BOLT
28	12-30516	WASHER, RUBBER - UPPER MOUNT BOLT
29	12-30515	WASHER, UPPER MOUNT BOLT
30	26218	COVER, UPPER MOUNT - OUTSIDE HALF
31	26217	COVER, UPPER MOUNT - INSIDE HALF
32	37396	MOUNT, RUBBER - UPPER
33	24929	PACKING, "U" CUP
34	10-20012	SCREW, UPPER MOUNT COVER (1 5/8")
35	10-28775	SCREW, UPPER MOUNT COVER (2 1/8")
36	12-8M0204649	WASHER, UPPER MOUNT COVER SCREWS
37	11-35888	NUT, UPPER MOUNT COVER SCREWS
38	25067	BUMPER, RUBBER - MOUNTING SCREW
39	10-75284	SCREW, UPPER MOUNT (5 1/2")
40	37397	MOUNT, RUBBER - LOWER
41	11-25096	NUT, MOUNTING SCREW
42	26337	COVER, LOWER MOUNT - STARBOARD SIDE
43	10-29256	SCREW, LOWER MOUNT COVER FASTENING
44	35608	CLAMP, LOWER MOUNT TO DRIVE SHAFT HOUSING
45	24-35522	SPRING, TENSION - LOWER MOUNT CLAMP
46	10-29256	SCREW, LOWER MOUNT CLAMP TO DRIVE SHAFT HOUSING
47	11-35521	NUT, LOWER MOUNT CLAMP COVER
48	35474T	COVER, LOWER MOUNT CLAMP
49	10-29722	SCREW, COVER TO LOWER MOUNT CLAMP

▶FLYWHEEL ASSEMBLY AND STATOR (18 parts)

Ref	OEM Part #	Part Name
1	845-3304A1	NUT, FLYWHEEL
2	12-33001	WASHER, FLYWHEEL NUT
3	28-45554	KEY, FLYWHEEL DRIVE
4	216-2094A5	FLYWHEEL ASSEMBLY, COMPLETE
5	10-32156	SCREW, FLEXIBLE PLATE TO FLYWHEEL
6	50-33000A1	RATCHET ASSEMBLY
7	10-32417	SCREW, RATCHET TO FLYWHEEL
8	17-26618	PIN, DOWEL - PULLEY LOCATING
9	29788	FLANGE, FLYWHEEL PULLEY
10	30306	PULLEY, FLYWHEEL
11	29787	HUB, FLYWHEEL PULLEY
12	398-2171	STATOR, ALTERNATOR
13	30050	TERMINAL, STATOR LEAD WIRE
14	10-57021	SCREW, STATOR TO UPPER END CAP
15	54-26550	CLIP, STATOR LEAD TO CRANKCASE FLANGE
16	8M0084613	"D" WASHER, CLIP FASTENING SCREW
17	10-62568	SCREW, STATOR LEAD CLIP TO CRANKCASE FLANGE
18	54-22783	"S" CLIP, STATOR LEAD TO BOTTOM COWL

▶FUEL PUMP AND FUEL LINE ASSEMBLY (32 parts)

Ref	OEM Part #	Part Name
1	30269A2	FUEL PUMP ASSEMBLY - UPPER
2	27-23005	GASKET, CHECK VALVE TO HOUSING
3	21-8M0082362	VALVE, CHECK - FUEL PUMP
4	23004	RETAINER, CHECK VALVE
5	10-43725	SCREW, RETAINER TO HOUSING
6	27-24863	GASKET, FUEL PUMP
7	23014	DIAPHRAGM, FUEL PUMP
8	30461A2	FUEL PUMP ASSEMBLY - LOWER
9	30275	COVER, FUEL PUMP
10	27-30276	GASKET, FUEL PUMP COVER
11	10-29878	SCREW, FUEL PUMP MOUNTING (1 1/2") - UPPER/LOWER PUMP
12	10-30274	SCREW, FUEL PUMP MOUNTING (1 3/4") - UPPER PUMP
13	10-30273	SCREW, FUEL PUMP MOUNTING (1 7/8") - LOWER PUMP
14	32-33154A1	FUEL LINE ASS'Y, UPPER PUMP TO UPPER CARBURETOR (13 1/2")
15	22-8M0123050	ELBOW (45 ), UPPER CARBURETOR
16	22-30174	ELBOW, UPPER FUEL PUMP OUTLET
17	22-30175	SLEEVE, FUEL PUMP OUTLET ELBOW
18	22-30177	NUT, FUEL PUMP OUTLET ELBOW
19	32-31552A1	FUEL LINE ASS'Y, LOWER PUMP TO UPPER PUMP (12 3/8")
20	32-31553A1	FUEL LINE ASS'Y, LOWER PUMP TO LOWER CARBURETOR (19 3/4")
21	32-30176	FUEL LINE, ADAPTOR TO LOWER FUEL PUMP INLET
22	22-30174	ELBOW, LOWER FUEL PUMP INLET
23	22-30175	SLEEVE, FUEL PUMP INLET ELBOW
24	22-30177	NUT, FUEL PUMP INLET ELBOW
25	30186	ADAPTOR, CHECK UNIT (FUEL LINE)
26	30187	STEM, CHECK UNIT ADAPTOR
27	25-16524	"O" RING, ADAPTOR STEM
28	24-30189	SPRING, ADAPTOR STEM
29	30188	CUP WASHER, ADAPTOR
30	10-56500	SCREW, ADAPTOR TO BOTTOM COWL
31	11-8M0207775	NUT, ADAPTOR FASTENING SCREW
32	32-31550A1	FUEL LINE ASSEMBLY, UPPER TO LOWER CARBURETOR (6")

▶GEAR HOUSING ASSEMBLY, COMPLETE (PAGE 1) (50 parts)

Ref	OEM Part #	Part Name
-	1623-2022A7	GEAR HOUSING ASSEMBLY, COMPLETE (STANDARD) Comment: 1623-2022A5 GEAR HOUSING ASSEMBLY, COMPLETE INCLUDE ALL PARTS FROM REFERENCE #1 THRU REFERENCE #73 AS LISTED ON PAGES 30 AND 31
1	1623-2022A1	GEAR HOUSING ASSEMBLY
2	16-57921	STUD, GEAR HOUSING TO DRIVE SHAFT HOUSING (3 15/16")
3	16-8M0133358	STUD, GEAR HOUSING TO DRIVE SHAFT HOUSING (2")
4	16-30669	STUD, WATER PUMP BASE AND BODY TO GEAR HOUSING (3 1/4")
5	16-306671	STUD, WATER PUMP BASE AND BODY TO GEAR HOUSING (3 1/8")
6	31-32898T	BEARING, ROLLER - DRIVE SHAFT
7	45-38459	DRIVE SHAFT (STANDARD)
8	43-31419	GEAR, PINION - DRIVE SHAFT
9	11-30932	NUT, PINION GEAR TO DRIVE SHAFT
10	15-30278A1	SHIM, DRIVE SHAFT BALL BEARING TO GEAR HOUSING (.002-3-5-10
11	30-63326T	BEARING, BALL - DRIVE SHAFT
12	53-30726	RING, RETAINING - BALL BEARING
13	27-32438	GASKET, WATER PUMP BASE TO GEAR HOUSING
14	25-8M0204651	"O" RING, WATER PUMP BASE
15	46-48758A1	WATER PUMP ASSEMBLY
16	26-94038	OIL SEAL, WATER PUMP BASE
17	17-29596T	DOWEL PIN, WATER PUMP BASE TO WATER PUMP BODY
18	27-8M0090319	GASKET, LOWER - WATER PUMP BASE TO FACE PLATE
19	8M0204677	PLATE, FACE - WATER PUMP BASE TO WATER PUMP BODY
20	27-858524	GASKET, UPPER - FACE PLATE TO WATER PUMP BODY
21	46-96148A8	WATER PUMP BODY ASSEMBLY
22	30915	INSERT, WATER PUMP BODY
23	26-16977	OIL SEAL, WATER PUMP BODY
24	47-89984T4	IMPELLER, WATER PUMP
25	17-8M0214994	PIN, IMPELLER DRIVE
26	10-30720	SCREW, WATER PUMP BODY TO GEAR HOUSING (1/4)
27	13-26992	LOCKWASHER, WATER PUMP BODY FASTENING SCREW AND STUDS (1/4)
28	11-29598	NUT, WATER PUMP BODY FASTENING STUDS (1/4)
29	13-8M0204647	LOCKWASHER, WATER PUMP BODY FASTENING STUD (5/16)
30	11-28770	NUT, WATER PUMP BODY FASTENING STUD (5/16)
31	25-8M0214918	RING, RUBBER - CENTRIFUGAL SLINGER (DRIVE SHAFT)
32	26-38970	SEAL, RUBBER - WATER PUMP BODY
33	23-29804T	SLEEVE, GUIDE - WATER INLET TUBE
34	25-8M0214919	"O" RING, UPPER - DRIVE SHAFT
35	25136	SHAFT, SHIFT - LOWER
36	53-29641	CLIP, RETAINING - SHIFT SHAFT
37	25-25439	"O" RING, SHIFT SHAFT BUSHING
38	23-8M0112749	BUSHING ASSEMBLY, SHIFT SHAFT
39	26-892361	OIL SEAL, SHIFT SHAFT BUSHING
40	12-31266	WASHER, RUBBER - SHIFT SHAFT BUSHING
41	52918	CAM, LOWER - REVERSE LOCKING
42	52919	CAM, UPPER - REVERSE LOCKING
43	23-30607	SPACER, NYLON - REVERSE LOCKING CAM
44	22-390721	PLUG, PIPE - SHIFT SHAFT GREASE FILLER HOLE
45	10-79953Q04	SCREW, GREASE FILLER AND VENT HOLE
46	12-191833	WASHER, GREASE FILLER AND VENT HOLE SCREW
47	10-29608	SCREW, GEAR HOUSING FLUSHING HOLE
48	27-8M0214916	GASKET, GEAR HOUSING FLUSHING HOLE SCREW
49	26-8M0214917	SEAL, GEAR HOUSING FLUSHING HOLE

▶GEAR HOUSING ASSEMBLY, COMPLETE (PAGE 2) (36 parts)

Ref	OEM Part #	Part Name
-	1623-2022A7	GEAR HOUSING ASSEMBLY, COMPLETE (STANDARD) Comment: 1623-2022A5 GEAR HOUSING ASSEMBLY, COMPLETE INCLUDE ALL PARTS FROM REFERENCE #1 THRU REFERENCE #73 AS LISTED ON PAGES 30 AND 31
--	43-31887	REVERSE GEAR ASSEMBLY, COMPLETE
1	1623-2022A1	GEAR HOUSING ASSEMBLY (SEE PAGE 30 FOR PARTS BREAKDOWN)
50	760394	CAM, SHIFT
51	30625	FOLLOWER, CAM
52	30624	SLIDE, CROSS PIN
53	24-30622	SPRING, COMPRESSION - CAM FOLLOWER
54	15-30923A1	SHIM, BEARING OUTER RACE TO GEAR HSG. (.002-3-5-10)
55	43-53100A3	FORWARD GEAR ASSEMBLY
56	31-30895T	BEARING, ROLLER - FORWARD GEAR
57	31-30894A1	TAPERED ROLLER BEARING ASSEMBLY
58	31-31092	CUP, TAPERED ROLLER BEARING
59	52-822539T	RATCHET, SLIDING CLUTCH
60	17-8M0100263	PIN, CROSS - RATCHET TO PROPELLER SHAFT
61	24-30893	SPRING, RETAINING - CROSS PIN
62	44-47900A2	SHAFT, PROPELLER
63	43-31887	REVERSE GEAR ASSEMBLY
64	30-31265	BEARING, BALL - REVERSE GEAR
65	12-71143A1	WASHER, THRUST - BEARING CARRIER TO GEAR HOUSING
66	15-29955A1	SHIM, THRUST WASHER TO GEAR HOUSING (.002-3-5-10)
67	25-29976	"O" RING, BEARING CARRIER
68	31284T1	BEARING CARRIER ASSEMBLY
69	31-30956T	BEARING, ROLLER - BEARING CARRIER
70	26-8M0204670	OIL SEAL, BEARING CARRIER
71	28-30281	KEY, LOCATING - BEARING CARRIER
72	12-29957	WASHER, GEAR HOUSING COVER
73	52699	COVER, GEAR HOUSING
74	12-31013	WASHER, THRUST - BEARING CARRIER
75	30581A1	THRUST HUB AND WASHER ASSEMBLY
76	12-29590	WASHER, CUPPED - THRUST HUB
77	12-31211Q03	WASHER, SPLINED - PROPELLER SHAFT
78	14-816629Q	TAB WASHER, PROPELLER NUT
79	11-29594	NUT, PROPELLER
80	97-31640Q4	TRIM TAB, GEAR HOUSING
81	10-32470	SCREW, TRIM TAB TO GEAR HOUSING (1 3/4")
82	10-30206	SCREW, GEAR HOUSING TO DRIVE SHAFT HOUSING (1")

▶MAGNETO ADAPTOR AND PILOT ASSEMBLY (30 parts)

Ref	OEM Part #	Part Name
1	45-33007	SHAFT, DRIVE - MAGNETO
2	39561A1	MAGNETO PILOT ASSEMBLY
3	24-27944	SPRING, HORSESHOE - MAGNETO PILOT
4	17-27962	PIN, ANCHOR - HORSESHOE SPRING TO PILOT
5	33020	STOP, SPARK ADVANCE - MAGNETO PILOT
6	30-20066	BEARING, BALL - MAGNETO PILOT
7	10-30110	SCREW, PILOT ASSEMBLY TO MAGNETO
8	48103A1	ECONOMISER COLLAR AND PIN ASSEMBLY
9	17-27961	PIN, ECONOMISER COLLAR - SPRING RETAINER
10	22-25094	FITTING, GREASE - ECONOMISER COLLAR
11	33147A1	THROTTLE ACTUATOR ASSEMBLY
12	23-26602	BUSHING, NYLON - THROTTLE ACTUATOR
13	10-31009	SCREW, THROTTLE ACTUATOR TO ECONOMISER COLLAR
14	30408	ADAPTOR, MAGNETO
15	22-25094	FITTING, GREASE - MAGNETO ADAPTOR
16	10-78841	SCREW, MAGNETO ADAPTOR AND PILOT TO CRANKCASE
17	12-20084	WASHER, MAGNETO ADAPTOR AND PILOT FASTENING SCREW
18	11-22053	NUT, MAGNETO ADAPTOR AND PILOT FASTENING SCREW
19	12-27939	WASHER, MAGNETO PILOT
20	14-27960	TAB WASHER, ADAPTOR CAP FASTENING
21	13-27959	WASHER, WAVE - MAGNETO BALL BEARING TENSION
22	27955	CAP, MAGNETO ADAPTOR AND PILOT FASTENING
23	23-29909	SPACER, DRIVEN PULLEY
24	29906A1	DRIVEN PULLEY ASSEMBLY
25	17-29908	PIN, ROLL - FLANGE LOCATING
26	29907	FLANGE, DRIVEN PULLEY
27	28-29910	KEY, MAGNETO DRIVING
28	13-26996	LOCKWASHER, PULLEY CLAMPING SCREW
29	10-41506	SCREW, PULLEY CLAMPING
30	20140	BELT, TIMING

▶MAGNETO ASSEMBLY (INTERNAL PARTS) (46 parts)

Ref	OEM Part #	Part Name
-	394-2271A2	MAGNETO ASSEMBLY, COMPLETE (4D-4)
1	394-1570	FRAME, MAGNETO HOUSING
2	10-25510	SCREW, 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 HOLDING
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/TENSION SPRING FASTENING
25	11-29236	NUT, PRIMARY LEAD FASTENING
26	394-1106A1	HOLDER AND CAM WICK ASSEMBLY
27	12-26439	WASHER, BREAKER PIVOT PIN
28	18-26953	COTTER PIN, BREAKER TO PIVOT PIN
29	10-20597	SCREW, BREAKER HOLDER TO HOUSING
30	394-1130A1	CONDENSER
31	10-25509	SCREW AND LOCKWASHER, CONDENSER FASTENING
32	27-29166	GASKET, MAGNETO COVER
33	394-1577A2	COVER, MAGNETO
34	10-29418	SCREW, COVER TO FRAME
35	14-29157	TAB WASHER, COVER FASTENING SCREW
36	394-2602A1	MAGNETO ROTOR ASSEMBLY
37	394-1110	CLIP, SPRING
38	27-25725	GASKET, END CAP COVER
39	394-1561A2	END CAP COVER ASSEMBLY
40	394-1056A1	BRUSH AND SPRING ASSEMBLY
41	10-25517	SCREW, HIGH TENSION CABLE FASTENING
42	29121	PIPE PLUG, END CAP COVER (NOT REQUIRED ON LATER MODELS)
43	10-29418	SCREW, END CAP COVER TO MAGNETO COVER
44	14-29157	TAB WASHER, COVER FASTENING SCREW
45	22-996642	ELBOW, PLASTIC - MAGNETO COVER VENT

▶MAGNETO VERTICAL LINKAGE AND EXTERNAL PARTS (33 parts)

Ref	OEM Part #	Part Name
1	53458	PLATE, THROTTLE STOP
2	37-29315	DECAL, THROTTLE STOP PLATE (STOP ADJUSTMENTS)
3	10-24933	SCREW, ADJUSTING - THROTTLE STOP
4	11-20088	NUT, THROTTLE STOP ADJUSTING SCREW
5	26852	CAP, NYLON - ADJUSTING SCREW
6	10-69035	SCREW, THROTTLE STOP PLATE TO ADAPTER (5/8") Comment: SEE BLOCK COMMENTS
7	25996A1	SWIVEL AND LINK ROD ASSEMBLY
8	11-25168	NUT, ADJUSTING - UPPER LINK ROD
9	35626	ROD, LINK - UPPER
10	27947	SWIVEL, LINKAGE - ECONOMISER COLLAR
11	27948	SWIVEL, UPPER AND LOWER LINK RODS
12	30582	LEVER, LINKAGE - UPPER
13	12-8M0204649	WASHER, UPPER AND LOWER SWIVEL
14	11-8267089	NUT, UPPER AND LOWER SWIVEL TO LEVER AND BRACKET
15	10-25781	SCREW, SET - LINKAGE LEVER
16	33019	SHAFT, VERTICAL
17	32-35899	TUBE, VERTICAL SHAFT
18	23-26954	BUSHING, NYLON - VERTICAL SHAFT
19	12-20553	WASHER, VERTICAL SHAFT - CENTER
20	17-25319	ROLL PIN, VERTICAL SHAFT AND LINKAGE LEVERS
21	30788	LEVER, LINKAGE - LOWER
22	33004	ROD, LINK - LOWER
23	23-33017	SPACER, VERTICAL SHAFT - LOWER
24	33-813413	SPARK PLUG
25	85-63709A1	PROTECTOR, SPARK PLUG
26	54-29425	CLIP, HIGH TENSION LEAD CABLE FASTENING
27	84-821945A46	CABLE, HIGH TENSION LEAD - SPARK PLUG
28	25-25429	"O" RING, HIGH TENSION LEAD CABLE TO END CAP COVER
29	394-2271A2	MAGNETO ASSEMBLY, COMPLETE (4D-4)
30	54-25231	CLIP, MERCURY SWITCH AND HARNESS LEADS TO MAGNETO
31	8M0084613	"D" WASHER, CLIP FASTENING SCREW
32	10-20401	SCREW, LEAD CLIP TO MAGNETO
33	394-1134A1	GROUND STRAP ASSEMBLY, MAGNETO TO CRANKCASE

▶MERC 650EL PARTS LIST (1 parts)

Ref	OEM Part #	Part Name
-	94-33874	SHIPPING CARTON

▶STARTER MOTOR, STARTER SOLENOID, RECTIFIER AND WIRING HARNES (37 parts)

Ref	OEM Part #	Part Name
1	33155	WIRING HARNESS, INTERNAL
2	30050	TERMINAL, HARNESS AND SWITCH LEADS
3	26079A2	PLATE, WIRING HARNESS TO BOTTOM COWL
4	10-45893	SCREW, WIRING HARNESS AND PLATE TO BOTTOM COWL
5	24-28975	SPRING, GARTER - INTERNAL WIRING HARNESS
6	54-22783	"S" CLIP, RECTIFIER HARNESS LEAD TO BOTTOM COWL
7	30212	BLOCK, TERMINAL - EXHAUST COVER
8	10-33152	SCREW, HARNESS LEADS TO TERMINAL BLOCK
9	10-62568	SCREW, TERMINAL BLOCK TO EXHAUSE COVER
10	50-58788A3	STARTER MOTOR ASSEMBLY (DELCO-REMY)
11	10-22698	SCREW, STARTER MOTOR TO CRANKCASE FLANGE
12	13-8M0204647	LOCKWASHER, STARTER MOTOR FASTENING SCREW
13	10-69035	SCREW, WIRING HARNESS GROUND LEAD TO STARTER MOTOR
14	31057	PLATE, SPACER - STARTER MOTOR TO BRACKET
15	38747	BRACKET, SUPPORT - STARTER MOTOR
16	13-24669	LOCKWASHER, THRU BOLT - BRACKET TO STARTER MOTOR
17	11-20890	NUT, THRU BOLT - BRACKET TO STARTER MOTOR
18	54-22740	CLIP, HARNESS LEAD WIRES TO SUPPORT BRACKET (3/8-6)
19	8M0084613	"D" WASHER, CLIP FASTENING SCREW
20	10-8M0113176	SCREW, LEAD WIRE CLIP FASTENING
21	54-23567	CLIP, HARNESS LEAD WIRE TO SUPPORT BRACKET (9/16-6)
22	8M0084613	"D" WASHER, CLIP FASTENING SCREW
23	10-8M0113176	SCREW, LEAD WIRE CLIP FASTENING
24	32445A1	SOLENOID, STARTER
25	10-29238	SCREW, SOLENOID TO STARTER MOTOR
26	10,13-26996	LOCKWASHER, SOLENOID TERMINAL
27	10,11-68219	NUT, SOLENOID TERMINAL
28	28016A1	GROUND STRAP ASSEMBLY, SOLENOID TO STARTER MOTOR
29	84-93389A12	CABLE, WIRE - SOLENOID TO STARTER MOTOR
30	13-8M0204647	LOCKWASHER, SOLENOID TERMINAL (5/16)
31	11-22053	NUT, SOLENOID TERMINAL (5/16)
32	32177A2	RECTIFIER ASSEMBLY
33	13-8M0204647	LOCKWASHER, RECTIFIER MOUNTING SCREW
34	11-21929	NUT, RECTIFIER MOUNTING SCREW
35	32-28373	SLEEVE, RUBBER - RECTIFIER HARNESS LEAD
36	10-35400	SCREW, HARNESS AND STATOR LEADS TO RECTIFIER
37	11-8M0204718	NUT, HARNESS AND STATOR LEAD FASTENING SCREW

▶TOP COWL AND STARTER ASSEMBLY (49 parts)

Ref	OEM Part #	Part Name
1	182-1895A2	TOP COWL ASSEMBLY
2	16-33071	STUD, FRONT-TOP COWL TO CRANKCASE
3	25-20116	GROMMET, CHOKE KNOB
4	23-33070	SPACER, TOP COWL FRONT STUDS
5	31476	REVEAL, AIR INTAKE
6	10-37370	SCREW, REVEAL TO TOP COWL
7	13-26996	LOCKWASHER, REVEAL TO TOP COWL FASTENING SCREW
8	31475	SCREEN, VENT-TOP COWL
9	10-26668	SCREW, VENT SCREEN TO TOP COWL
10	31298A1	PLATE ASSEMBLY, COWL MOUNTING
11	16-20353	STUD, REAR-TOP COWL TO COVER
12	10-28668	SCREW, PLATE ASSEMBLY TO TOP COWL
13	12-20028	WASHER, TOP COWL STUD (1/16")
14	12-69057	WASHER, TOP COWL STUD (3/4" OD)
15	12-20583	WASHER, TOP COWL STUD (1/32")
16	11-8267089	NUT, TOP COWL FASTENING
17	20155	RETAINER, STARTER SPRING
18	24-29340T02	SPRING, STARTER REWIND
19	23-28912	BUSHING, SPRING GUIDE
20	50-30994	SHEAVE ASSEMBLY
21	30596	PAWL, STARTER
22	13-36206	WASHER, WAVE-STARTER PAWL
23	23-28919	BUSHING, NYLON-SHEAVE SHAFT SPACER
24	45477A1	SPACER, SHEAVE SHAFT
25	26179	RETAINER, WAVE WASHER
26	12-26180	WASHER, SHEAVE SHAFT TO STARTER SHEAVE
27	13-20160	WASHER, WAVE-WASHER TENSION
28	30595	PLATE, RETAINER-STARTER PAWL
29	45477A1	SHAFT, SHEAVE
30	14-20165	TAB WASHER, SHEAVE SHAFT NUT
31	11-20166	NUT, SHEAVE SHAFT (LEFT HAND THREAD)
32	50-12066Q10	STARTER CABLE ASSEMBLY
33	28747	HANDLE, STARTER CABLE
34	79470A1	RETAINER, STARTER CABLE AND HANDLE
35	35800	PLATE, ROPE GUIDE Comment: REFERENCE NUMBERS 35 AND 36 ARE TO BE REPLACED ACCORDING TO SIZE OF TAPPED SCREW HOLES IN TOP COWL
36	6-32,10-358811	SCREW, DRIVE-ROPE GUIDE PLATE TO TOP COWL Comment: REFERENCE NUMBERS 35 AND 36 ARE TO BE REPLACED ACCORDING TO SIZE OF TAPPED SCREW HOLES IN TOP COWL
37	31463	HANDLE, CHROME-TOP COWL
38	31487	HANDLE ASSEMBLY, INSIDE-TOP COWL
39	35496	PAD, BUMPER-TOP COWL HANDLE
40	12-20533	WASHER, CHROME HANDLE TO INSIDE HANDLE STUD
41	11-826709109	NUT, CHROME HANDLE TO INSIDE HANDLE FASTENING
42	10-29199	SCREW, FRONT-HANDLE TO TOP COWL (1")
43	12-20533	WASHER, FRONT SCREW-HANDLE TO TOP COWL
44	11-826709109	NUT, HANDLE TO TOP COWL STUD
45	29980A1	TRIM MOULDING ASSEMBLY-TOP COWL
46	10-29226	SCREW, DECORATIVE-MOULDING TO TOP COWL
47	10-29227	SCREW, BRASS-MOULDING TO TOP COWL
48	13-26995	LOCKWASHER, MOULDING FASTENING SCREW
49	11-26419	NUT, MOULDING FASTENING SCREW

100-Hour / Annual Service Checklist

Regular maintenance keeps your Mercury 650 (4 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 650 (4 CYL.) (1542745 THRU 1765043) Parts & Diagrams

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