– JLM Marine Boat Parts Limited

Mercury 650 (3 CYL.) (4382057 THRU 4571651) Parts & Diagrams

🔎 Mercury 650 (3 CYL.) Reference Library — Exploded parts diagrams (17 diagrams), specifications, common issues, and maintenance checklist.

The Mercury 650 (3 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 (3 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 (3 CYL.).

▶CARBURETOR ASSEMBLY (15 parts)

Ref	OEM Part #	Part Name
--	812953	REPAIR PARTS KIT (LONG SHAFT)
1	1379-6071A9	CARBURETOR ASSEMBLY, COMPLETE (LONG SHAFT)
2	1395-6359	JET, VENT BOWL (.052) LONG SHAFT
3	1395-83181	INLET NEEDLE AND SEAT
5	1395-6685	VENTURI ASSEMBLY
11	19273	FLOAT
12	1395-6206	FUEL BOWL
15	1395-6199	PLUG, MAIN JET
16	1395-6202	JET, MAIN (.088)-LONG SHAFT
20	1395-4807	SHAFT, THROTTLE
21	1395-6196	VALVE, THROTTLE
23	1395-6204	SEAL, THROTTLE SHAFT
24	1395-6203	WASHER, THROTTLE SHAFT
26	1395-6198	VALVE ASSEMBLY, ENRICHMENT
29	27-733771	GASKET, CARBURETORO

▶CARBURETOR LINKAGE AND CHOKE SOLENOID (24 parts)

Ref	OEM Part #	Part Name
1	60549A7	CHOKE SOLENOID
2	13-26996	LOCKWASHER, HARNESS LEAD TO CHOKE SOLENOID
3	11-68219	NUT, HARNESS LEAD TO SOLENOID ATTACHING
4	10-33524	SCREW, CHOKE SOLENOID ATTACHING (5/8")
5	11-29250	NUT, CHOKE SOLENOID ATTACHING SCREWS
6	89008A2	PLUNGER ASSEMBLY, CHOKE SOLENOID
7	76076A1	CHOKE ROD
8	90242A1	CHOKE KNOB ASSEMBLY
9	10-77137	SCREW, WIRE TO CHOKE KNOB
10	25-20116	GROMMET, CHOKE KNOB
13	1379-6071A9	CARBURETOR ASSEMBLY (LONG SHAFT)
14	10-52743	SCREW, CARBURETOR TO CRANKCASE (3 3/4")
15	60568	LEVER, THROTTLE
16	10-60293	SCERW, LEVER TO CARBURETOR
17	60292A1	COUPLING ASSEMBLY
18	28-89694	INSERT, THROTTLE SHAFT COUPLING
19	11-92500	WASHER, ROLLED COUPLING
20	10-60293	SCREW, ROLLED WASHER TO COUPING
21	76904A1	PLATE ASSEMBLY, CARBURETOR
22	71090	SEAL, CARBURETOR PLATE
23	27-73398	GASKET, CARBURETOR PLATE
24	27-76952	GASKET, CARBURETOR PLATE TO CARBURETOR
25	10-20367	SCREW, PLATE TO CARBURETOR (7/16")
26	12-8M0204649	WASHER, PLATE SCREW

▶CLAMP AND SWIVEL BRACKET ASSEMBLY (G2) (49 parts)

Ref	OEM Part #	Part Name
1	1440-8394A1	CLAMP BRACKET ASSEMBLY
2	10-78492A1	THUMB SCREW ASSEMBLY
3	75043	CAP, THUMB SCREW
4	8M0041936	TUBE, TILT-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 (9 1/2")
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	1490-8599A6	SWIVEL BRACKET ASSEMBLY (LONG SHAFT)
19	26-32911	OIL SEAL, SWIVEL BRACKET
20	10-47828	SCREW, DRIVE-SWIVEL BRACKET
21	22-8M0169589	FITTING, GREASE
22	76386	TILT LOCK ASSEMBLY, STARBOARD
23	76385T	TILT LOCK ASSEMBLY, PORT
24	47802	TUBE, TILT LOCK
25	18-47959	COTTER PIN, TILT LOCK
26	23-71574	BUSHING, TILT LOCK TUBE
27	13-69150	WASHER, WAVE-TILT LOCK TUBE
28	69540A2	SWIVEL PIN AND STEERING ARM ASSEMBLY (LONG SHAFT)
29	30711	BUMPER, STEERING ARM
30	10-66897	BOLT, UPPER MOUNT TO SWIVEL PIN (7/16 X 5 1/4")
31	17-25598	PIN, REVERSE LOCK SPRING ATTACHING
32	12-26837	WASHER, SWIVEL PIN TO BOTTOM YOKE (.065)
33	77416T1	YOKE, BOTTOM
34	11-71956	NUT, SWIVEL PIN RETAINING
35	55-696531	PIN, LOWER SHOCK MOUNTING
36	87432	REVERSE LOCK
37	24-29821	SPRING, REVERSE LOCK TENSION
38	56349	SHAFT, REVERSE LOCK PIVOT
39	23-69132	BUSHING, REVERSE PIVOT SHAFT
40	18-45882	COTTER PIN, REVERSE LOCK TO SHAFT
41	23-73203	SPACER, UPPER SHOCK BUSHING TO CLAMP BRACKET
42	12-59378	WASHER, LOWER BUSHING RETAINER (INNER)
43	55-58780A7	SHOCK ABSORBER
44	23-32171	BUSHING, RUBBER-SHOCK ABSORBER (UPPER)
45	23-28198	BUSHING, RUBBER-SHOCK ABSORBER (LOWER)
46	12-8M0204648	WASHER, UPPER AND LOWER BUSHING RETAINER (OUTER)
47	10-69375A1	SCREW, UPPER AND LOWER SHOCK MOUNTING PIN (3/4")
48	70679	COVER, UPPER AND LOWER SHOCK MOUNTING PIN
49	10-37655	SCREW, COVER TO SHOCK MOUNTING SCREWS (1/2")

▶COWL SUPPORT BRACKETS (47 parts)

Ref	OEM Part #	Part Name
1	73641A1	BRACKET, COWL SUPPORT-TOP
2	62444	SEAL, RUBBER-TOP BRACKET AND COVER MOUNTING PLATE
3	79652	CLIP, TOP COWL SUPPORT BRACKET
4	10-48408	SCREW, CLIP TO TOP COWL SUPPORT (1/2")
5	12-45075	WASHER, CLIP TO TOP COWL SUPPORT BRACKET
6	79490	SHIELD FLYWHEEL
7	10-37656	SCREW, SHIELD TO TOP SUPPORT BRACKET (5/8")
8	10-48408	SCREW, SHIELD TO TOP SUPPORT BRACKET (1/2")
9	74510A2	BRACKET, COWL SUPPORT-REAR
10	698761	SEAL, REAR BRACKET AND TOP BRACKET
11	90435	MOUNT, RUBBER-BRACE TO REAR SUPPORT BRACKET
12	12-69057	WASHER, RUBBER MOUNT TO REAT SUPPORT BRACKET
13	11-826709109	NUT, RUBBER MOUNT TO REAR SUPPORT BRACKET
14	269011	STOP, RUBBER-REAR SUPPORT BRACKET
15	60116	BRACE, REAR COWL SUPPORT BRACKET (TOP)
16	10-24878	SCREW, SUPPORT BRK. BRACE TO CYL. BLOCK COVER (1 3/8")
17	90435	MOUNT, RUBBER- FRONT SUPPORT BRACKET TO BRACKET
18	12-69057	WASHER, RUBBER MOUNT TO FRONT SUPPORT BRACKET
19	11-8267089	NUT, RUBBER MOUNT TO FRONT SUPPORT BRACKET
20	71097	BRACKET, RUBBER MOUNT
21	10-39349	SCREW, BRACKET TO CRANKCASE (3/4")
22	79489	ATTENUATOR, SOUND
23	76218	COVER, TOP-SOUND ATTENUATOR
24	27-71096	GASKET, TOP COVER
25	10-37571	SCREW, TOP COVER TO SOUND ATTENUATOR (1/2")
26	12-8M0204666	WASHER, TOP COVER SCREW
27	75841	COVER, MANUAL CHOKE
28	10-37978	SCREW, COVER TO TOP COVER
29	12-8M0204666	WASHER, COVER SCREW
30	73986	AIR MANIFOLD
31	10-69093	SCREW, AIR MANIFOLD TO SOUND ATTENUATOR
32	12-8M0204649	WASHER, AIR MANIFOLD SCREW
34	90435	MOUNT, RUBBER-FRONT SUPPORT TO STARTER MOTOR COVER
36	12-69057	WASHER, RUBBER MOUNT ATTACHING
37	11-8267089	NUT, RUBBER MOUNT ATTACHING
38	76410	SEAL, FUEL CONNECTOR-FRONT SUPPORT BRACKET
39	21-428671	CONNECTOR ASSEMBLY, ATTENUATOR
40	32-9938779	TUBE, VENT (LOWER)
41	22-56759	FITTING, CRANKCASE VENT (PRESS IN)
42	72956	COVER, SOUND ATTENUATOR (FRONT)
43	27-76579	GASKET, FRONT COVER
45	10-37571	SCREW, FRONT COVER TO SOUND ATTENUATOR (1/2")
46	19-73336	PLUG, FRONT COVER
47	76251A1	PLATE ASSEMBLY, FRONT COVER MOUNTING
48	76264	LATCH, FRONT COVER ATTACHING
49	24-60295	SPRING, FRONT COVER LATCH
50	10-28635	SCREW, COVER PLATE TO SUPPORT BRACKET (5/8")

▶COWLING AND FRONT COVER (27 parts)

Ref	OEM Part #	Part Name
1	2142-6228A1	COWL ASSEMBLY (STARBOARD)
2	26-60297	SEAL, FUEL CONNECTOR-COWL
3	2141-6227A1	COWL ASSEMBLY (PORT)
4	26-60298	SEAL, CONTROL CABLES-COWL
5	89717T	BRACKET, COWL SEALING-REAR
6	698761	SEAL, REAR BRACKET
7	90980	BRACKET, COWL HINGE
8	10-75794	SCREW, HINGE BRACKET TO REAR BRACKET- UPPER (1 1/8')
8A	75805	CAP, HINGE BRACKET SCREW (UPPER)
9	13-26992	LOCKWASHER, HINGE BRACKET SCREW
10	12-75806	WASHER, HINGE BRACKET SCREW (UPPER)
11	90979	PIN, COWL HINGE
12	10-28782	SCREW, PIN TO COWL (7/8")
13	13-8M0204647	LOCKWASHER, PIN ATTACHING SCREW
14	46785A5	COWL LATCH ASSEMBLY
15	62628	BARREL, COWL LATCH
16	10-31312	SCREW, LATCH ASSEMBLY TO BARREL (7/8")
17	15222	BAR, ADJUSTMENT-COWL LATCH
18	62629	BARREL, COWL LATCH
19	24-62624	SPRING, TENSION-COWL LATCH
20	12-30164	WASHER, ADJUSTMENT BAR TO BARREL
21	11-859124	NUT, ADJUSTMENT BAR TO BARREL
22	2143-7254A3	COWL FRONT COVER ASSEMBLY
23	795511	BLANKET, SOUND ABSORBING-FRONT COVER
24	61158T	HOOK, COWL FRONT COVER FASTENING
25	10-69570	SCREW, FASTENING HOOK TO COWL FRONT COVER (3/4")
26	47341A11	STARTER ROPE ASSEMBLY (FOR MANUAL STARTING ONLY)

▶CRANKSHAFT, PISTONS AND CONNECTING RODS (28 parts)

Ref	OEM Part #	Part Name
--	39-78811A12	RING, PISTON (.015)
1	462-8839A2	CRANKSHAFT ASSEMBLY
2	30-64424T	BEARING, BALL-LOWER AND UPPER
3	15-22369A1	SHIM, LOWER BEARING TO CRANKSHAFT
4	60834A3	CARRIER ASSEMBLY, "O"RING
5	64254001	"O" RING, CARRIER
6	542-7509A3	MAIN BEARING ASSEMBLY (VALVE TYPE)
7	17-20032	DOWEL PIN, MAIN BEARING
8	17-60282	DOWEL PIN (STEPPED)
9	17-65855	DOWEL PIN, REED STOP
10	34-66051A1	REED SET, MATCHED-MAIN BEARING
11	34-65946	REED STOP
12	10-77280	SCREW, REED STOP MOUNTING (9/16")
13	11-20110	NUT, REED STOP MOUNTING SCREW
14	10-45775	SCREW, MAIN BEARING CLAMPING (9/16")
15	11-45774	NUT, MAIN BEARING SCREW CLAMPING
16	26113T	RACE, OUTER (PAIR)
17	53-26933	RING, SNAP-OUTER RACE CLAMPING
18	29-714221	BEARING, NEEDLE
19	774-9137A12	PISTON AND PISTON PIN ASSEMBLY (LONG SHAFT)
20	53-857196	LOCK RING, PISTON PIN
21	39-78816A12	RING, PISTON
22	624-8101A3	CONNECTING ROD AND CAP ASSEMBLY
23	10-54803	SCREW, CAP TO CONNECTING ROD (1 1/2")
24	11-49091	NUT, CONNECTING ROD SCREW
25	31-62596A1	BEARING ASSEMBLY, CRANKPIN
26	29-8M0214934	BEARING, NEEDLE-PISTON PIN
27	12-8M0032839	WASHER, NEEDLE LOCATING

▶CYLINDER BLOCK AND CRANKCASE ASSEMBLY (29 parts)

Ref	OEM Part #	Part Name
1	865-5890A3	CYLINDER BLOCK AND CRANKCASE ASSEMBLY (LONG SHAFT)
2	27-60286	GASKET, CRANKCASE TO CYLINDER BLOCK
3	16-68201	STUD, CRANKCASE TO DRIVE SHAFT HOUSING (2 1/4")
4	17-43044	DOWEL PIN, CRANKCASE TO CYLINDER BLOCK
5	17-20323	DOWEL PIN, CYLINDER BLOCK TO MAIN BEARING
6	16-68203	STUD, BLOCK TO DRIVE SHAFT HOUSING (4")
7	16-68167	STUD, BLOCK TO DRIVE SHAFT HSG. (2 9/16")-TRANSFER SIDE
8	76975	COVER, STARTER MOTOR TO CRANKCASE (BOTTOM)
9	10-73657	SCREW, STARTER MOTOR COVER TO CRANKCASE (2")
10	10-22698	SCREW, STARTER MOTOR COVER TO CRANKCASE (1 3/4")
11	79735A1	COVER, STARTER MOTOR TO CRANKCASE (TOP)
12	10-815549	SCREW, STARTER MOTOR COVER TO CRANKCASE (2")
13	10-35385	SCREW, CRANKCASE TO CYLINDER BLOCK (1 3/4")
14	10-73657	SCREW, CRANKCASE TO CYLINDER BLOCK (1 1/2")
15	10-22039	SCREW, CRANKCASE TO CYLINDER BLOCK (2 3/4")
16	12-26020	WASHER, CRANKCASE TO CYLINDER BLOCK SCREW
17	11-29250	NUT, CRANKCASE TO CYLINDER BLOCK SCREW (BOTTOM)
18	73217	INDICATOR, TIMING
19	10-69022	SCREW, INDICATOR TO STARTER COVER
20	1161-6357A1	END CAP ASSEMBLY, UPPER
21	25-64966	"O"RING, END CAP
22	26-41953	OIL SEAL, END CAP
23	10-812618	SCREW, UPPER END CAP MOUNTING (1")
24	15-73644A1	SHIM, UPPER END CAP (.006-8-10)
25	1144-6691A1	END CAP ASSEMBLY, LOWER
26	25-32546	"O"RING, END CAP
27	26-41953	OIL SEAL, END CAP
28	10-30225	SCREW, LOWER END CAP MOUNTING (1")
29	15-20085A1	SHIM, LOWER END CAP (.002-3-5-10)

▶DRIVE SHAFT HOUSING ASSEMBLY (G4) (46 parts)

Ref	OEM Part #	Part Name
1	1593-7513A12	DRIVE SHAFT HOUSING ASSEMBLY (LONG SHAFT)
2	19-64649	PLUG, PLASTIC-TRIM TAB SCREW HOLE
3	16-8M0022145	STUD, DRIVE SHAFT HOUSING TO GEAR HOUSING (1 3/4")
4	16-57935	STUD, DRIVE SHAFT HOUSING TO GEAR HOUSING (3")
5	12-65791	WASHER, GEAR HOUSING TO DRIVE SHAFT HOUSING STUDS
6	11-8M0204653	NUT, 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, PUSH ROD TO REVERSE LOCK
11	18-25191	COTTER PIN, PUSH ROD PIN
12	933361	GUIDE, PUSH ROD
13	35474T	COVER, LOWER MOUNT CLAMP
14	10-29722	SCREW, COVER TO LOWER MOUNT CLAMP (5/8")
15	11-35521	NUT, LOWER MOUNT CLAMP COVER
16	69592F1	CLAMP, LOWER MOUNT TO DRIVE SHAFT HOUSING
17	10-29256	SCREW, LOWER MOUNT CLAMP TO DRIVE SHAFT HOUSING (7/8")
18	24-35522	SPRING, TENSION-LOWER MOUNT CLAMP
19	75304T1	MOUNT, RUBBER-LOWER
20	10-75284	SCREW, LOWER MOUNT (5 1/2")
21	12-28051	WASHER, MOUNT SCREW
22	12-28053	WASHER, RUBBER-LOWER MOUNT SCREW
23	12-61709	WASHER, LOWER MOUNT SCREW
24	11-25096	NUT, LOWER MOUNT SCREW
25	923373	MOUNT, RUBBER-UPPER
25A	25-65936	"O"RING, UPPER MOUNT
26	24929	PACKING, "U" CUP-UPPER MOUNT SCREW
27	79680A1	COVER, UPPER MOUNT-OUTSIDE HALF
28	79680A1	COVER, UPPER MOUNT-INSIDE HALF
29	10-71959	SCREW, UPPER MOUNT COVER-REAR (1 1/2")
30	10-71958	SCREW, UPPER MOUNT COVER-FRONT (1 3/4")
30A	12-8M0204649	WASHER, UPPER MOUNT COVER SCREW
31	11-36069	NUT, UPPER MOUNT COVER SCREW
32	12-27727	WASHER, UPPER MOUNT BOLT (4/16 ID)
33	12-66966	WASHER, RUBBER-UPPER MOUNT BOLT
34	12-30514	WASHER, UPPER MOUNT BOLT (7/16 ID)
35	11-8M0204653	NUT, UPPER MOUNT BOLT
36	27-385011	GASKET, EXHAUST EXTENSION PLATE TO DRIVE SHAFT HOUSING
37	11-64809	NUT, POWERHEAD TO DRIVE SHAFT HOUSING STUDS (5/16")
38	695441	TUBE, EXHAUST (LONG SHAFT)
39	32-45679	TUBE, WATER INLET (LONG SHAFT)
40	23-23651	SLEEVE, WATER INLET TUBE
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, RETAINING STRIP TO DRIVE SHAFT HOUSING (SELF TAPPING)

▶EXHAUST AND MANIFOLD COVERS (35 parts)

Ref	OEM Part #	Part Name
1	865-5890A3	CYLINDER BLOCK AND CRANKCASE ASSEMBLY (LONG SHAFT)
2	65848	CARRIER, GROMMET
3	25-64872	GROMMET, POPPET RELIEF VALVE
4	86596	POPPET, RELIEF VALVE
5	24-64878	SPRING, COMPRESSION-POPPET RELIEF VALVE
6	648771	DIAPHRAGM, POPPET VALVE
7	12-76451	WASHER, DIAPHRAGM
8	10-69570	SCREW, WASHER AND DIAPHRAGM TO POPPET VALVE
9	73216A1	COVER, TRANSFER PASSAGE
10	27-73442	GASKET, TRANSFER PASSAGE COVER
11	10-38837	SCREW, TRANSFER PASSAGE COVER MOUNTING (1 1/8")
12	1025-8116A1	COVER, CYLINDER BLOCK
13	27-88449	GASKET, CYLINDER BLOCK COVER
14	10-28667	SCREW, CYLINDER BLOCK COVER MOUNTING (1 1/8")
15	22-328022	PLUG, CYLINDER BLOCK COVER
16	27-695252	GASKET, BAFFLE PLATE TO CYLINDER BLOCK
17	27-703351	GASKET, BAFFLE PLATE TO CYLINDER BLOCK COVER
18	69579	PLATE, BAFFLE-EXHAUST MANIFOLD
19	75692	THERMOSTAT
20	27-8M0204714	GASKET, THERMOSTAT
21	27-695242	GASKET, PLATE TO EXHAUST MANIFOLD COVER
22	74214	COVER, EXHAUST MANIFOLD
23	10-38837	SCREW, PLATE AND MANIFOLD COVER MOUNTING (1 1/8")
24	10-74824	SCREW, PLATE AND MANIFOLD COVER MOUNTING (1 1/4")
25	10-70602	SCREW, PLATE/MANIFOLD COVER MOUNTING (2")
26	87-33386A3	SWITCH, MERCURY
27	10-37655	SCREW, MERCURY SWITCH TO CRANKCASE (1/2")
28	17-36242	PIN, ROLL-MERCURY SWITCH
29	61990	STA-STRAP, MERCURY SWITCH LEAD
30	32-9938779	HOSE, CRANKCASE BLEED (12")
31	21-64871A3	FITTING, CRANKCASE BLEED
32	22-56759	FITTING, CRANKCASE BLEED (PRESS IN)
33	54-648552	CLIP, BLEED HOSE
34	10-62568	SCREW, BLEED HOSE CLIP
35	8M0084613	"C"WASHER, BLEED HOSE CLIP

▶FLYWHEEL, SWITCH BOX, IGNITION COIL AND STATOR ASSEMBLY (30 parts)

Ref	OEM Part #	Part Name
1	11-52901	NUT, FLYWHEEL
2	12-33001	WASHER, FLYWHEEL NUT
3	19-45907	PLUG, FLYWHEEL PULLER THREADS
4	248-8722A5	FLYWHEEL ASSEMBLY
5	10-68997	SCREW, PLATE/HUB TO FLEXIBLE PLATE (3/4")
6	10-32417	SCREW, FLEXIBLE PLATE TO FLYWHEEL (5/8")
7	889351	PLATE, SWITCH
8	25-57009001	GROMMET, SWITCH BOX PLATE
9	10-824941	SCREW, SWITCH BOX PLATE TO CYLINDER BLOCK (3/4")
10	12-56720	WASHER, SWITCH BOX PLATE SCREW
11	332-7778A12	SWITCH BOX ASSEMBLY
12	10-26251	SCREW, SWITCH BOX TO PLATE (13/16")
13	46933A6	WIRE ASSEMBLY, SWITCH BOX SCREW
14	11-45076	NUT, SWITCH BOX TERMINAL
15	84-68896A1	WIRE ASSEMBLY, SWITCH BOX TO COIL (GREEN/RED)
16	84-60466A17	WIRE ASSEMBLY, SWITCH BOX TO COIL (BLACK)
17	73439	PLATE, MOUNTING-IGNITION COIL
18	300-8M0166172	IGNITION COIL ASSEMBLY
19	11-45076	NUT, IGNITION COIL TERMINAL
20	43542	COVER, IGNITION COIL
21	10-46368	SCREW, COVER TO MOUNTING PLATE (2")
22	398-5704A7	STATOR ASSEMBLY
23	10-63136	SCREW, STATOR TO UPPER END CAP (7/8")
24	96455A8	TRIGGER PLATE ASSEMBLY
25	54-28700	CLAMP, STATOR LEADS ATTACHING
26	10-98253	SCREW, CLAMP TO CRANKCASE (1/2")
27	84-813715A1	WIRE ASSEMBLY, SPARK PLUG
28	332-2854T01	BOOT, IGNITION COIL END
29	33-896329827	SPARK PLUG (AC#V40FFM)
30	15-74049	SHIM, STATOR

▶FUEL PUMP, FUEL FILTER AND FUEL LINES (39 parts)

Ref	OEM Part #	Part Name
1	62973A4	FUEL PUMP ASSEMBLY
2	21-30430A3	CHECK VALVE ASSEMBLY
3	55278A1	DIAPHRAGM KIT
6	23004	RETAINER, CHECK VALVE
7	10-43725	SCREW, RETAINER TO HOUSING (3/8")
8	10-86885	SCREW, PUMP MOUNTING (1 5/8")
9	22-328022	PLUG, PIPE-FUEL PUMP
10	32-774572	HOSE ASSEMBLY, FUEL PUMP TO EXHAUST PLATE (9 1/2")
11	22-996642	ELBOW, HOSE TO EXHAUST PLATE
12	32-774572	HOSE ASSEMBLY, FUEL PUMP TO TELL TALE NOZZLE (8 1/2")
13	54-68725	CLAMP, HOSE TO FUEL PUMP AND FITTING
14	69555001	NOZZLE, TELL TALE-REAR SUPPORT BRACKET
15	54-70705	CLAMP, TELL TALE NOZZLE
16	10-69079	SCREW, TELL TALE CLAMP
17	22-64705	FITTING, FUEL PUMP (INLET)
18	32-8M0108355	FUEL LINE, ADAPTOR TO FUEL PUMP (12")
19	54-68424	CLAMP, FUEL LINE ATTACHING
20	22-63187	FITTING, FUEL LINE TO ADAPTOR
21	22833	ADAPTOR, CHECK UNIT (FUEL PUMP)
22	23069	STEM, CHECK UNIT ADAPTOR
23	25-16524	"O"RING, ADAPTOR STEM
24	24-23067T	SPRING, ADAPTOR STEM
25	30188	CUP WASHER, ADAPTOR
26	10-36154	SCREW, ADAPTOR TO SOUND ATTENTUATOR (1 3/8")
28	32-8M0108355	FUEL LINE, FUEL PUMP/FUEL FILTER COVER (2 1/2")
29	76221	BASE, FUEL FILTER AND COVER
30	10-22698	SCREW, FILTER BASE TO TRANSFER PASSAGE COVER (1 1/4")
31	12-34437	WASHER, FILTER BASE SCREW
32	35-59072	FILTER, FUEL
33	25-35480	"O"RING, FILTER COVER
34	35-91078A1	COVER, FILTER
35	10-32228	SCREW, FILTER COVER FASTENING (5/8")
36	27-25848	GASKET, FILTER COVER FASTENING SCREW
37	22-19688	FITTING, BASE
38	32-8M0108355	FUEL LINE, BASE TO LOWER CARBUETOR (9 1/2")
39	22-64706001	TEE, LOWER CARBURETOR
40	32-8M0108355	FUEL LINE, CARBURETOR TO CARBURETOR (3")
41	22-19688	FITTING, UPPER CARBURETOR
42	22-70007	FITTING, FUEL PUMP (OUTLET)

▶GEAR HOUSING ASSEMBLY, COMPLETE (G6) (48 parts)

Ref	OEM Part #	Part Name
-	1643-6038A10	GEAR HOUSING ASSEMBLY, COMPLETE (LONG SHAFT) -SEE FOOTNOTE
1	1643-6038A6	GEAR HOUSING ASSEMBLY
2	17-21438	PIN, DOWEL-GEAR HOUSING
3	16-33778	STUD, WATER PUMP BODY/BASE TO GEAR HOUSING (2 5/8")
4	16-8M0034453	STUD, GEAR HOUSING TO DRIVE SHAFT HOUSING (2 3/16")
5	31-62091T	BEARING, ROLLER-DRIVE SHAFT
6	72849A1	SCREEN, WATER INTAKE-PORT -LONG SHAFT
7	10-36070	SCREW, SCREENS TO GEAR HOUSING (1 1/4")
8	11-859124	NUT, SCREEN TO GEAR HOUSING SCREW
9	92815	PLATE, SUPPORT-EXHAUST TUBE SEAL
10	37721001	SEAL, EXHAUST TUBE
11	43-60245	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, LOWER-WATER PUMP BASE TO FACE PLATE
20	32768	PLATE, FACE-WATER PUMP BASE TO WATER PUMP BODY
21	27-19551	GASKET, UPPER-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	69787A1	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	26-24590	OIL SEAL, SHIFT SHAFT BUSHING (LOWER)
40	26-892361	OIL SEAL, SHIFT SHAFT BUSHING (UPPER)
41	12-31266	WASHER, RUBBER-SHIFT SHAFT BUSHING
42	78036	BASE, LOWER-REVERSE LOCKING
43	69542	CAM, REVERSE LOCKING
44	45-76088A2	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	15-20929A1	SHIM, BEARING TO GEAR HOUSING (.002-3-5-10)
49	31-38146A1	ROLLER BEARING ASSEMBLY, TAPERED-DRIVE SHAFT

▶GEAR HOUSING ASSEMBLY, COMPLETE (G8) (37 parts)

Ref	OEM Part #	Part Name
-1	1643-6038A10	GEAR HOUSING ASSEMBLY, COMPLETE (LONG SHAFT) -SEE FOOTNOTE
-	1643-6038A9	GEAR HOUSING ASSEMBLY, COMPLETE (SHORT SHAFT)-SEE FOOTNOTE
1	1643-6038A6	GEAR HOUSING ASSEMBLY (SEE G6 FOR BREAKDOWN)
50	760394	CAM SHIFT
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-FOWARD GEAR
57	43-60247T5	FORWARD GEAR ASSEMBLY
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
62	43-79159T	REVERSE GEAR ASSEMBLY
63	15-20927A1	SHIM, THRUST WASHER TO GEAR HOUSING (.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
70	26-8M0203757	OIL SEAL, BEARING CARRIER-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, DRIVE SHAFT HOUSING TO GEAR HOUSING (3/8")
78	12-65791	WASHER, DRIVE SHAFT HOUSING STUD (7/16")
79	11-8M0204653	NUT, DRIVE SHAFT HOUSING TO GEAR HOUSING (7/16")
80	65758	THRUST HUB, PROPELLER
81	62124A1	THRUST HUB ASSEMBLY, REAR
82	12-31992	WASHER, CUPPED-THRUST HUB
83	11-69578Q1	NUT, PROPELLER

▶MISCELLANEOUS PARTS/ACCESORIES (1 parts)

Ref	OEM Part #	Part Name
-	37-73930A76	DECAL SET

▶SHIFT LINKAGE AND EXHAUST PLATE (39 parts)

Ref	OEM Part #	Part Name
1	814283A2	BRACKET, ANCHOR-CONTROL CABLES
2	60283A1	LINK ASSEMBLY, SHIFT SHAFT AND ANCHOR BRACKET
3	24-20099	SPRING, LINK TO ANCHOR BRACKET
4	37896	GUIDE BLOCK, LINK
5	52100	WEAR PLATE, NYLON-LINK
6	8M0036768	LATCH, LINK TO ANCHOR BRACKET
7	12-69056	WASHER, LINK LATCH
8	11-826709109	NUT, LINK ATTACHING
9	75008A5	SHIFT SHAFT ASSEMBLY, UPPER (LONG SHAFT)
11	13-29720	WASHER, WAVE-SHIFT SHAFT TO LINK
12	23-26600	BUSHING, NYLON-SHIFT SHAFT TO LINK
13	12-24664	WASHER, LINK (SHIFT SHAFT END)
14	39519	CUP, RETAINER-ANCHOR BRACKET
15	87609A1	LEVER, NYLON-SHIFT CABLE LOCKING
16	17-47175	PIN, LOCKING LEVER AND COVER FASTENING
17	87609A1	LINK, LOCKING LEVER TO COVER
18	39667	COVER, NYLON-SHIFT CABLE
19	10-69101	SCREW, ANCHOR BRACKET TO CRANKCASE/CYL. BLOCK (7/8")
20	27-60317	GASKET, POWERHEAD TO EXHAUST PLATE
21	73712A3	EXHAUST PLATE ASSEMBLY
21A	23-27132	BUSHING, NYLON-EXHAUST PLATE
22	16-8M0034449	STUD, EXHAUST PLATE TO DRIVE SHAFT HOUSING (1 11/16")
23	16-68166	STUD, EXHAUST PLATE TO DRIVE SHAFT HOUSING (2 1/8")
24	73156	SEAL, WATER INLET TUBE
25	12-38453	WASHER, NYLON-WATER INLET TUBE SEAL
26	38500	RETAINER, WATER INLET TUBE SEAL
27	10-69069	SCREW, RETAINER TO EXHAUST PLATE (3/4")
28	60307	SEAL, EXHAUST PLATE
29	60306	STRIP, RETAINING-EXHAUST PLATE SEAL
30	10-62568	SCREW, RETAINING STRIP TO EXHAUST PLATE (3/8")
31	90435	MOUNT, RUBBER-EXHAUST PLATE TO REAR COWL SUPPORT
32	49651A1	GROUND STRAP ASS'Y, EXHAUST PLATE TO REAR COWL SUPPORT
33	12-69057	WASHER, RUBBER MOUNT ATTAHCING
34	11-8267089	NUT, RUBBER MOUNT TO EXHAUST PLATE
35	10-37562	SCREW, EXHAUST PLATE PLATE TO CYLINDER BLOCK (1")
36	27-385011	GASKET, ADAPTOR PLATE TO DRIVE SHAFT HOUSING
37	58911	EXHAUST TUBE, ADAPTOR
38	27-602801	GASKET, EXHAUST TUBE TO EXHAUST PLATE
39	10-28636	SCREW, EXHAUST TUBE TO EXHAUST PLATE (3/4")

▶STARTER MOTOR, STARTER SOLENOID AND RECTIFIER ASSEMBLY (28 parts)

Ref	OEM Part #	Part Name
1	8M0058226	RECTIFIER ASSEMBLY
2	10-38055	SCREW, RECTIFIER TO PLATE (5/8")
3	13-26996	LOCKWASHER, RECTIFIER SCREW
4	11-45076	NUT, RECTIFIER TERMINAL
5	89-853654A1	STARTER SOLENOID
6	10,13-26996	LOCKWASHER, SOLENOID TERMINAL
7	10,11-68219	NUT, SOLENOID TERMINAL
8	13-8M0204647	LOCKWASHER, SOLENOID TERMINAL (5/16")
9	11-8M0204668	NUT, SOLENOID TERMINAL (5/16")
10	46265	BOOT, TERMINAL-STARTER SOLENOID
11	10-69054	SCREW, SOLENOID TO TOP COVER (3/4")
12	13-26992	WASHER, SOLENOID SCREW
13	50-44369A1	STARTER MOTOR ASSEMBLY
14	8M0043376	STOP, RUBBER- STARTER MOTOR
15	84-60872	CABLE, STARTER TO SOUND ATTENTUATOR-BLACK (9 1/2")
16	10-28635	SCREW, CABLE TO STARTER MOTOR (5/8")
17	84-93389A6	CABLE, SOLENOID TO STARTER MOTOR-YELLOW (9 1/2")
18	13-26992	LOCKWASHER, STARTER MOTOR TERMINAL
19	11-20890	NUT, STARTER MOTOR TERMINAL
20	23-8M0034918	COLLAR, RUBBER-STARTER MOUNT
21	23-56774	SPACER, COLLAR TO MOUNTING BRACKETS
22	84-62862A4	CABLE, BATTERY TO STARTER SOLENOID
23	84-73204	WIRING HARNESS (INTERNAL)
24	10-69560	SCREW, WIRING HARNESS TO FRONT SUPPORT BRACKET (1 1/4")
25	11-46438	NUT, WIRING HARNESS SCREW
26	60114A1	BRACKET ASSEMBLY, WIRING HARNESS
27	26-60925	SEAL, WIRING HARNESS BRACKET
28	10-89778	SCREW, WIRING HARNESS BRACKET MOUNTING (2 1/4")

▶THROTTLE CONTROL LINKAGE AND SPARK ADVANCE (34 parts)

Ref	OEM Part #	Part Name
1	76864	HOUSING, NYLON-THROTTLE ACTUATOR
2	77025	CAM, NYLON-THROTTLE ACTUATOR
3	10-37571	SCREW, HOUSING TO CRANKCASE (1/2")
4	13-26996	LOCKWASHER, HOUSING TO CRANKCASE SCREW
5	60570	PLATE, RETAINER-ACTUATOR HOUSING
6	23-74213	BARREL, NYLON-THROTTLE LINK ROD
7	74164	ROD, LINK-THROTTLE
8	73783	SWIVEL, LINK ROD TO THROTTLE CONTROL LEVER
9	23-26856	BUSHING, LINK ROD SWIVEL
10	12-73288	WASHER, LINK ROD SWIVEL
11	11-45774	NUT, LINK ROD SWIVEL
12	77032A2	LEVER, THROTTLE CONTROL
13	10-67916	SCREW, ADJUSTING-THROTTLE LEVER (2")
14	11-29598	NUT, JAM-ADJUSTING SCREW
15	52023	CAP, ADJUSTING SCREW
16	10-818165	SCREW, THROTTLE CONTROL LEVER TO CYLINDER BLOCK (1 3/4")
17	23-55164	BUSHING, THROTTLE CONTROL LEVER SCREW
18	23-55171	BUSHING, THROTTLE CONTROL LEVER SCREW
19	24-55162	SPRING, RETURN-SPARK ADVANCE LEVER
20	77031A2	LEVER, SPARK ADVANCE
21	12-68410	WASHER, THROTTLE CONTROL LEVER SCREW
22	10-73656	SCREW, SPARK ADVANCE ADJUSTING (1 3/8")
23	11-68219	NUT, SPARK ADVANCE ADJUSTING SCREW
24	48039	CAP, SPARK ADVANCE ADJUSTING SCREW
25	10-67916	SCREW, ADJUSTING-SPARK ADVANCE LEVER (2")
26	11-29598	NUT, JAM-ADJUSTING SCREW
27	52023	CAP, ADJUSTING SCREW
28	39483	LATCH, THROTTLE CONTROL LEVER (THROTTLE CABLE)
29	10-69026	SCREW, LATCH TO THROTTLE CONTROL LEVER (7/8")
30	24-20099	SPRING, COMPRESSION-LATCH SCREW
31	11-826709109	NUT, LATCH ATTACHING SCREW
32	74897T	BARREL, LINK ROD TO STATOR
33	74212	ROD, LINK-SPARK ADVANCE
34	73783	SWIVEL, LINK ROD TO SPARK ADVANCE LEVER

100-Hour / Annual Service Checklist

Regular maintenance keeps your Mercury 650 (3 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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