Mercury 650 (3 CYL.) (7073473 THRU 7087822) Parts & Diagrams

OEM and aftermarket replacement parts for Mercury 650 (3 CYL.). Scroll down for exploded parts diagrams (17), specifications, and maintenance reference.

Mercury 650 (3 CYL.) (7073473 THRU 7087822) 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) CARBURETOR ASSEMBLY
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) CARBURETOR LINKAGE AND CHOKE SOLENOID
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) CLAMP AND SWIVEL BRACKET ASSEMBLY (G2)
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) COWL SUPPORT BRACKETS
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) COWLING AND FRONT COVER
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) CRANKSHAFT, PISTONS AND CONNECTING RODS
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) CYLINDER BLOCK AND CRANKCASE ASSEMBLY
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) DRIVE SHAFT HOUSING ASSEMBLY (G4)
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) EXHAUST AND MANIFOLD COVERS
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) FLYWHEEL, SWITCH BOX, IGNITION COIL AND STATOR ASSEMBLY
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) FUEL PUMP, FUEL FILTER AND FUEL LINES
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) GEAR HOUSING ASSEMBLY, COMPLETE (G6)
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) GEAR HOUSING ASSEMBLY, COMPLETE (G8)
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) MISCELLANEOUS PARTS/ACCESORIES
Ref OEM Part # Part Name
- 37-73930A76 DECAL SET
SHIFT LINKAGE AND EXHAUST PLATE (39 parts) SHIFT LINKAGE AND EXHAUST PLATE
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) STARTER MOTOR, STARTER SOLENOID AND RECTIFIER ASSEMBLY
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) THROTTLE CONTROL LINKAGE AND SPARK ADVANCE
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.

  1. Replace water pump impeller and inspect wear plate
  2. Change engine oil and oil filter (check drain plug washer)
  3. Replace spark plugs and check ignition timing
  4. Drain and refill lower unit gear oil; inspect for water contamination
  5. Inspect fuel lines, primer bulb, and fuel filter for deterioration
  6. Check and replace sacrificial anodes (zinc or aluminum)
  7. Inspect propeller for damage; check shaft seal and cotter pin
  8. Check valve clearance (refer to service manual for specifications)
  9. Lubricate all grease points (steering, tilt tube, shift linkage)
  10. 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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