Mercury 75 (3274633 THRU 3801457) Parts & Diagrams

🔎 Mercury 75 Reference Library — Exploded parts diagrams (20 diagrams), specifications, common issues, and maintenance checklist.

The Mercury 75 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	75 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	710 mL (24 fl oz)
Idle Speed (in gear)	650 ± 50 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 75:

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 75.

▶BOTTOM COWL AND ADAPTOR PLATE (47 parts)

Ref	OEM Part #	Part Name
1	63586A2	ADAPTOR PLATE ASSEMBLY Comment: SERIAL #3488153-09999999
2	23-13127	WASHER, NYLON - WATER OUTLET TUBE (ADAPTOR PLATE)
3	26-36556	SEAL, RUBBER - WATER OUTLET TUBE (ADAPTOR PLATE)
4	39044	SEAL, RUBER - ADAPTOR PLATE
5	27-89937	GASKET, POWERHEAD TO ADAPTOR PLATE
6	10-69026	SCREW, ADAPTOR PLATE TO DRIVE SHAFT HOUSING (7/8")
7	13-26992	LOCKWASHER, ADAPTOR PLATE SCREW
8	27-39050	GASKET, ADAPTOR PLATE TO DRIVE SHAFT HOUSING
9	2124-4900	COWL, BOTTOM Comment: SERIAL #3488153-09999999
10	39474	ANCHOR, LATCH - BOTTOM COWL Comment: SERIAL #3488153-09999999
11	10-22483	SCREW, LATCH ANCHOR TO BOTTOM COWL (1 1/8")
12	13-26992	LOCKWASHER, LATCH ANCHOR SCREW
13	25-39054	GROMMET, CHOKE SHAFT - BOTTOM COWL Comment: SERIAL 00000000-#3488152
14	59100	COVER, AIR INTAKE - BOTTOM COWL Comment: SERIAL 00000000-#3488152
15	10-8M0113176	SCREW, AIR INTAKE COVER TO BOTTOM COWL (3/8") Comment: SERIAL 00000000-#3488152
16	39058	SEAL, SHIFT HANDLE - BOTTOM COWL
17	39145	MOUNT, RUBBER - BOTTOM COWL TO ADAPTOR PLATE (STARBOARD)
18	39144	MOUNT, RUBBER - BOTTOM COWL TO ADAPTOR PLATE (PORT)
19	10-96138	SCREW, RUBBER MOUNT TO BOTTOM COWL (1/2")
20	11-8M0207775	NUT, ADAPTOR PLATE TO RUBBER MOUNT
21	39147	ADAPTOR, REAR MOUNT TO BOTTOM COWL
22	10-69026	SCREW, REAR MOUNT ADAPTOR TO BOTTOM COWL (7/8")
23	13-26992	LOCKWASHER, REAR MOUNT ADAPTOR SCREW
24	39146	MOUNT, RUBBER - BOTTOM COWL TO ADAPTOR PLATE (REAR)
25	13-26992	LOCKWASHER, REAR MOUNT
26	11-8M0207775	NUT, ADAPTOR PLATE TO REAR RUBBER MOUNT
27	63648	ROD, COWL LATCH - BOTTOM COWL
28	39099	BRACKET, COWL LATCH ROD
29	10-69026	SCREW, COWL LATCH BRACKET TO BOTTOM COWL (7/8")
30	13-26992	LOCKWASHER, COWL LATCH BRACKET SCREW
31	39083	HANDLE, COWL LATCH ROD (PORT)
32	39098	HANDLE, COWL LATCH ROD (STARBOARD)
33	23-60762	BUSHING, NYLON - COWL LATCH ROD TO BOTTOM COWL
34	17-25319	PIN, ROLL - HANDLE TO COWL LATCH ROD
35	32-8M0108355	TUBE, TELL TALE (11")
36	56712	NOZZLE, TELL TALE
37	10-41228	SCREW, TELL TALE NOZZLE TO BOTTOM COWL
38	59065A1	STOP SWITCH ASSEMBLY
39	38950A1	COVER ASSEMBLY, STOP SWITCH
40	12-59061	WASHER, STATOR LEAD TO STOP SWITCH
41	13-21972	LOCKWASHER, STOP SWITCH CONNECTOR
42	11-21971	NUT, STOP SWITCH TO BOTTOM COWL
43	13-26996	LOCKWASHER, STATOR LEAD TO STOP SWITCH
44	11-68219	NUT, STATOR LEAD TO STOP SWITCH
45	59796A1	GROUND WIRE, RUBBER MOUNT SCREW AND NUT
46	84-60871A6	CABLE ASSEMBLY, GROUND SERIAL AND UP Comment: SERIAL #3488153-09999999
47	10-8M0113176	SCREW, GROUND CABLE TO GROUND LATCH ROD Comment: SERIAL #3488153-09999999

▶CARBURETOR AND CHOKE ASSEMBLY (19 parts)

Ref	OEM Part #	Part Name
1	1364-8783A14	CARBURETOR ASSEMBLY, COMPLETE
2	32-8M0108355	FUEL LINE, ADAPTOR TO CARBURETOR (3 1/4")
3	54-63933	CLAMP, FUEL HOSE ATTACHING
4	22-63981	FITTING, FUEL LINE TO ADAPTOR
5	22833	ADAPTOR, CHECK UNIT (FUEL LINE)
6	23069	STEM, CHECK UNIT ADAPTOR
7	25-16524	"O" RING, ADAPTOR STEM
8	24-23067T	SPRING, ADAPTRO STEM
9	30188	CUP WASHER, ADAPTOR
10	10-37923	SCREW, ADAPTOR TO BOTTOM COWL (1 1/4")
11	65552	SCREEN, CARBURETOR
12	10-69022	SCREW, SCREEN TO CARBURETOR
13	86381	KNOB, CHOKE
14	11-73710	NUT, CHOKE CABLE TO BOTTOM COWL
15	72465	CABLE, CHOKE
16	10-45862	SCREW, CHOKE CABLE TO CARBURETOR
17	13-26996	LOCKWASHER, CHOKE CABLE SCREW
18	23-63932	SPACER, CHOKE CABLE SCREW
19	11-8M0207775	NUT, CARBURETOR ATTACHING

▶CARBURETOR ASSEMBLY (22 parts)

Ref	OEM Part #	Part Name
--	1395-92621	REPAIR PARTS KIT
1	1334-4115	CARBURETOR ASSEMBLY, COMPLETE (KB-12A)
2	1395-8673	FLOAT ASSEMBLY
6	1395-92581	INLET NEEDLE, SEAT AND GASKET
9	1399-1133	COVER, FLOAT BOWL
10	10-52195	SCREW, FLOAT BOWL COVER (SHORT)
11	10-52196	SCREW, FLOAT BOWL COVER (LONG)
12	13-26995	LOCKWASHER, FLOAT BOWL COVER SCREW
14	1399-3938	SCREEN, FILTER
16	1399-4791A1	COVER, STRAINER
18	10-25822	SCREW, STRAINER COVER
19	1395-6027	SCREW, THROTTLE STOP LEVER
20	8146791	LEVER, THROTTLE STOP
21	1399-1716	SHAFT, THROTTLE
25	1399-3743	SHUTTER, THROTTLE
28	10-28845	SCREW, PLUG - BODY CHANNEL
30	10-23178	SCREW, PLUG - MAIN NOZZLE
31	1399-4208	JET, MAIN FUEL (.031)
33	10-28405	SCREW, PLUG - MAIN FUEL JET CHANNEL
34	1399-3742	SCREW, IDLE ADJUSTMENT
36	27-63309	GASKET, CARBURETOR
37	11-8M0207775	NUT, CARBURETOR MOUNTING STUD

▶CARBURETOR ASSEMBLY, COMPLETE (26 parts)

Ref	OEM Part #	Part Name
--	1399-5137	DIAPHRAGM AND GASKET KIT
1	1364-8783A14	CARBURETOR ASSEMBLY, COMPLETE
4	24-27160	SPRING, IDLE MIXTURE SCREW
7	1395-9293	FLOAT
9	1399-5127	FUEL BOWL
11	1399-5128	SCREW, FUEL BOWL TO CARBURETOR
13	1395-9022	INLET NEEDLE AND SPRING
15	1399-3251	JET, MAIN FUEL (.034)
17	1399-5122	VALVE, CHOKE RELIEF
18	1399-5123	SPRING, CHOKE RELIEF VALVE
19	1399-5125	CHOKE SHUTTER
20	10-23035	SCREW, CHOKE SHUTTER TO CHOKE SHAFT
21	64247	VENTURI
24	1399-5129	BODY, FUEL PUMP
27	1399-5131	BODY, STRAINER
28	1395-808612	SCREW, STRAINER BODY TO CARBURETOR
29	1399-5758	SCREEN, STRAINER
31	64194A1	COVER ASSEMBLY, STRAINER (INLET)
34	1399-5124	CHOKE SHAFT
36	1399-5133	THROTTLE SHAFT
37	63646	LEVER, THROTTLE
38	1395-6027	SCREW, THROTTLE LEVER ATTACHING
41	10-23178	SCREW, PLUG - IDLE TUBE
42	1399-5138	THROTTLE SHUTTER
43	1399-5013	SCREW, THROTTLE SHUTTER TO THROTTLE SHAFT
44	27-63309	GASKET, CARBURETOR FLANGE

▶CARBURETOR CHOKE LINKAGE (9 parts)

Ref	OEM Part #	Part Name
1	59000	THROTTLE LEVER
2	10-20597	SCREW, THROTTLE LEVER TO CARBURETOR
3	79092	SHUTTER AND SCREEN, CHOKE - CARBURETOR
4	24-53310	SPRING, CHOKE SHUTTER TO LEVER
5	24-55299A1	SPRING ASSEMBLY, CARBURETOR
6	10-55298	SCREW, SPRING TO CARBURETOR
7	53188	LEVER, CHOKE
8	24-53190	SPRING, TENSION - CHOKE KNOB
9	53200	KNOB, CHOKE

▶CLAMP AND SWIVEL BRACKET ASSEMBLY (56 parts)

Ref	OEM Part #	Part Name
1	1468-5570A3	CLAMP BRACKET ASSEMBLY (PORT)
2	1467-5571A3	CLAMP BRACKET ASSEMBLY (STARBOARD)
3	59170A3	THUMB SCREW ASSEMBLY
4	12-26227	WASHER, THUMB SCREW
5	12-52864	WASHER, TILT TUBE - CLAMP TO SWIVEL BRACKET
6	45757	TILT TUBE, CLAMP TO SWIVEL BRACKET
7	54-8M0085928	CLIP, SAFETY CHAIN - TILT TUBE
8	11-858869	NUT, TILT TUBE FASTENING
9	16-59622	STUD, CLAMP BRACKET
10	13-26992	LOCKWASHER, CLAMP BRACKET STUD
11	11-29598	NUT, CLAMP BRACKET STUD
12	24-62143	SPRING, TILT LOCK PIN
13	17-55952A1	TILT LOCK PIN ASSEMBLY
14	10-67982	BOLT, CLAMP BRACKET TO BOAT
15	12-67983	WASHER, CLAMP BRACKET SCREW
16	11-8267098	NUT, CLAMP BRACKET SCREW
17	1471-5822A1	SWIVEL BRACKET
18	23-64028	BUSHING, SWIVEL BRACKET
19	23-26841	BUSHING, NYLON - REVERSE LOCK LEVER ROD
20	63551	ROD, REVERSE LOCK TO SWIVEL BRACKET
21	18-45882	COTTER PIN, REVERSE LOCK LEVER TO ROD
22	63628T	LEVER, REVERSE LOCK
23	61007	RETAINER, ROD - REVERSE LOCK
24	63559T	BRACKET, TROLL
25	24-63630	SPRING, EXTENSION - TROLL BRACKET
26	63554	GUIDE, SPRING
27	17-25319	ROLL PIN, SPRING GUIDE
28	79744	LEVER, CONTOL - TROLL BRACKET
29	13-63631	WASHER, WAVE - TROLL BRACKET LEVER
30	66559	SWIVEL PIN, SWIVEL BRACKET TO SADDLE
31	77334	CO-PILOT DISC
32	10-30679	SCREW, CO-PILOT DISC TO SADDLE (2 1/4")
33	11-8M0207775	NUT, CO-PILOT DISC FASTENING SCREW
34	20203	DISC, FRICTION - CLAMP PLATE AND SWIVEL BRACKET
35	63647	PLATE, CLAMP - CO-PILOT
36	10-62506	SCREW, CLAMP PLATE ADJUSTING (1 5/8")
37	12-35462	WASHER, CLAMP PLATE ADJUSTING SCREW
38	63310A1	LEVER ASSEMBLY, TILT STOP
39	10-41433	SCREW, TILT STOP LEVER
40	13-31030	WASHER, WAVE - LEVER ANCHOR SCREW
41	11-826709109	NUT, TILT STOP LEVER SCREW
42	10-36398	SCREW, SWIVEL BRACKET
43	61296	PLATE, CLAMP - CO-PILOT
44	10-62506	SCREW, CLAMP PLATE ADJUSTING Comment: FOR REPLACEMENT OF SCREW AND COTTER PIN USED ON EARLY MODELS IN THIS APPLICATION, ORDER C-10-62506 SCREW AND C-11-62505 NUT.
46	11-62505	NUT, CLAMP PLATE ADJUSTING SCREW Comment: FOR REPLACEMENT OF SCREW AND COTTER PIN USED ON EARLY MODELS IN THIS APPLICATION, ORDER C-10-62506 SCREW AND C-11-62505 NUT.
47	12-35462	WASHER, CLAMP PLATE ADJUSTING SCREW
48	13-48239	WASHER, WAVE - CLAMP PLATE ADJUSTING SCREW
49	62024T	LEVER, CONTROL - REVERSE LOCK
50	23-59573	SPACER, CLAMP PLATE ADJUSTING SCREW
51	61602	PLATE, LOCKING - CLAMP PLATE ADJUSTING SCREW
52	63310A1	LEVER, TILT STOP
53	10-29237	SCREW, RETAINING - TILT STOP LEVER
54	11-8M0207775	NUT, TILT STOP LEVER RETAINING SCREW
55	10-27791	SCREW, ANCHOR - TILT STOP LEVER
56	13-20846	WASHER, WAVE - LEVER ANCHOR SCREW
57	11-8M0207775	NUT, TILT STOP LEVER ANCHOR SCREW

▶CRANKSHAFT AND MAIN BEARING ASSEMBLY (10 parts)

Ref	OEM Part #	Part Name
1	421-2224	CRANKSHAFT
2	26-72793	CARRIER ASSEMBLY, SEAL CRANKSHAFT SERIAL AND UP Comment: SERIAL #3488153-09999999
3	26-72793	SEAL, CRANKSHAFT CARRIER Comment: SERIAL #3488153-09999999
4	550-8122A5	MAIN BEARING ASSEMBLY (VALVE TYPE)
5	17-65855	PIN, DOWEL - REED LOCATING
6	10-56781	SCREW, MAIN BEARING CLAMPING
7	17-20032	PIN, DOWEL - MAIN BEARING TO BLOCK
8	34-31942A1	REED SET, MATCHED - MAIN BEARING
9	34-52925	REED STOP, MAIN BERAING REED VALVES
10	10-27304	SCREW, REED STOP MOUNTING

▶CYLINDER BLOCK AND CRANKCASE ASSEMBLY (41 parts)

Ref	OEM Part #	Part Name
1	837-2756A17	CYLINDER BLOCK AND CRANKCASE ASS'Y (SERIAL AND UP) Comment: SERIAL #3488153-09999999
2	16-728091	STUD, BLOCK AND CRANKCASE TO DRIVE SHAFT HOUSING
3	10-657461	STUD, CARBURETOR MOUNTING
4	17-21438	PIN, DOWEL - CRANKCASE TO CYLINDER BLOCK
5	10-23015	SCREW, ADJUSTING - THROTTLE CONTROL (1")
6	11-68219	NUT, THROTTLE CONTROL ADJUSTING SCREW
7	22-61295A5	ELBOW ASSEMBLY, BLEED DRAIN
8	21-42657A3	CHECK VALVE ASSEMBLY
9	32-892024122	HOSE, BLEED DRAIN (6 1/2")
10	54-56223	CLAMP, BLEED HOSE ATTACHING
11	22-61294	ELBOW, INJECTION
12	22-996642	ELBOW, TELL TALE - CYLINDER BLCOK
13	10-64278	SCREW, CRANKCASE TO CYLINDER BLOCK (1")
14	10-24624	SCREW, CRANKCASE TO CYLINDER BLOCK (1 3/4")
15	11-8M0207775	NUT, CRANKCASE FASTENING SCREW
16	10-98260	SCREW, MAIN BEARING LOCKING (5/8")
17	14-20091	TAB WASHER, MAIN BEARING LOCKING SCREW
18	15-31412A1	SHIM, UPPER HOUSING TO CYLINDER BLOCK (.002-3-5-10)
19	1132-2400A1	BEARING HOUSING ASSEMBLY, UPPER
20	30-72961	BEARING, BALL - UPPER BEARING HOUSING
21	31-31410	BEARING, ROLLER - UPPER BEARING HOUSING
22	26-66301	OIL SEAL, UPPER BEARING HOUSING
23	25-20863	"O" RING, UPPER BEARING HOUSING
24	54-34598	CLAMP, HOLD DOWN RING
25	10-36205	SCREW, RING CLAMP TO BEARING HOUSING (9/16")
26	24-34731	SPRING, RING CLAMP SCREW
27	10-39002	SCREW, UPPER BEARING HOUSING (1/2")
28	27-780321	GASKET, TRANSFER PORT COVER
29	61155	COVER, TRANSFER PORT
30	10-20665	SCREW, PORT COVER TO CYLINDER BLOCK (1/2")
31	1019-7465A1	COVER, CYLINDER BLOCK
32	27-41382	GASKET, CYLINDER BLOCK COVER
33	10-21091	SCREW, CYL. BLOCK COVER TO CYL. BLOCK (1 1/8")
34	11-8M0207775	NUT, CYLINDER BLOCK COVER MOUNTING SCREW
35	27-78035	GASKET, CYLINDER BLOCK TO BAFFLE PLATE
36	78034	PLATE, BAFFLE - EXHAUST MANIFOLD
37	27-78035	GASKET, BAFFLE PLATE TO EXHAUST MANIFOLD COVER
38	74919T	COVER, EXHAUST MANIFOLD
39	10-28668	SCREW, BAFFLE PLATE AND MANIFOLD COVER MOUNTING (3/4")
40	30-72961	BEARING, BALL - CRANKCASE (LOWER)
41	26-56397	OIL SEAL, CRANKCASE (LOWER)

▶DRIVE SHAFT HOUSING ASSEMBLY (24 parts)

Ref	OEM Part #	Part Name
1	1558-4902A2	DRIVE SHAFT HOUSING ASSEMBLY (LONG SHAFT) Comment: SERIAL #3488153-09999999
2	16-66373	STUD, DRIVE SHAFT HOUSING TO GEAR HOUSING (2 5/16")
3	11-8M0204726	NUT, DRIVE SHAFT HOUSING STUD (3/8 - 24)
4	11-82670911	NUT, GEAR HOUSING TO DRIVE SHAFT HOUSING STUD (5/16 - 24)
5	39025	COVER, TRIM - DRIVE SHAFT HOUSING
6	10-25764	SCREW, TRIM COVER TO BOTTOM COWL (7/16")
7	32-39062	TUBE, WATER OUTLET (LONG SHAFT)
8	10-79953Q04	SCREW, FLUSH - DRIVE SHAFT HOUSING
9	12-191833	WASHER, SEALING - FLUSH SCREW
10	27-39050	GASKET, ADAPTOR PLATE TO DRIVE SHAFT HOUSING
11	11-24652	NUT, DRIVE SHAFT HOUSING TO POWERHEAD STUDS
12	47259A1	BLOCK ASSEMBLY, DRIVE SHAFT LONG SHAFT
13	10-47225	SCREW, BLOCK TO DRIVE SHAFT HSG. (1 1/4") LONG SHAFT
14	1559-8448A2	SADDLE Comment: SERIAL #3488153-09999999
15	64076	BUMPER, THRUST - SADDLE Comment: SERIAL #3488153-09999999
16	79896A1	MOUNT ASSEMBLY (LOWER AND UPPER) - SEE NOTE BELOW
17	53-26406	RING, RETAINING - UPPER AND LOWER MOUNT
18	71490	COVER, LOWER MOUNT
19	10-45817	SCREW, LOWER MOUNT COVER TO MOUNT (7/16")
20	71057	LINK ROD, REVERSE LOCK Comment: SERIAL #3488153-09999999
21	10-65414	SCREW, CAM RETAINER TO DRIVE SHAFT HOUSING (3/4") Comment: SERIAL #3488153-09999999
22	13-26992	LOCKWASHER, CAM RETAINER SCREW Comment: SERIAL #3488153-09999999
23	65216	CAM, REVERSE LOCK Comment: SERIAL #3488153-09999999
24	72007	RETAINER, REVERSE LOCK CAM Comment: SERIAL #3488153-09999999

▶FLYWHEEL AND IGNITION COIL (20 parts)

Ref	OEM Part #	Part Name
1	239-4473A1	FLYWHEEL ASSEMBLY
2	28-20094	KEY, FLYWHEEL DRIVE
3	25-62701	"O" RING, FLYWHEEL NUT
4	12-36245	WASHER, FLYWHEEL NUT
5	11-20696	NUT, FLYWHEEL
6	13-35629	WASHER, WAVE - BREAKER CAM TENSION
7	336-4466	CAM, BREAKER
8	336-4528T2	COIL ASSEMBLY, IGNITION
9	13-26996	LOCKWASHER, IGNITION COIL TERMINAL
10	11-45076	NUT, IGNITION COIL TERMINAL
11	66355	COVER, IGNITION COIL
12	10-61530	SCREW, COIL COVER TO REAR SUPPORT BRACKET (2 1/8")
13	11-27164	NUT, COIL COVER SCREW
14	84-813715A1	LEAD ASSEMBLY, HIGH TENSION
15	332-2854T01	NIPPLE, IGNITION COIL
16	85-63709A1	PROTECTOR ASSEMBLY, SPARK PLUG
17	33-896329833	SPARK PLUG (AC V40FFK)
18	56352	BRACKET, COIL SUPPORT
19	10-22968	SCREW, BRACKET TO CYLINDER BLOCK (1 1/4")
20	11-8M0207775	NUT, BRACKET SCREW

▶FUEL PUMP ASSEMBLY (20 parts)

Ref	OEM Part #	Part Name
1	89977A1	FUEL PUMP ASSEMBLY
2	21-30430A2	CHECK VALVE ASSEMBLY
3	53245A1	DIAPHRAGM KIT, FUEL PUMP
6	53241	BASE, FUEL PUMP
7	10-29200	SCREW, FUEL PUMP TO ANCHOR (5/8")
8	61541	COVER, FUEL PUMP
9	22-61544	ELBOW, PUMP OUTLET
10	10-32627	SCREW, FUEL PUMP TO BASE (1 1/2")
11	12-847883	WASHER, FUEL PUMP SCREW
12	32-9912688	HOSE, PRESSURE - CYLINDER BLOCK TO FUEL PUMP (7 1/2")
13	22-53553	ELBOW, PRESSURE HOSE TO CYL. BLOCK (45)
14	54-20387	CLAMP, PRESSURE HOSE TO ELBOWS
15	22833	ADAPTOR, CHECK UNIT (FUEL LINE)
16	10-22968	SCREW, ADAPTOR TO BOTTOM COWL (1 1/4")
17	23069	STEM, CHECK UNIT ADAPTOR
18	25-16524	"O" RING, ADAPTOR STEM
19	24-23067T	SPRING, ADAPTOR STEM
20	30188	CUP WASHER, ADAPTOR
21	32-61618	FUEL LINE, ADAPTRO FUEL PUMP
22	32-64055	FUEL LINE, FUEL PUMP TO CARBURETOR (5 3/4")

▶GEAR HOUSING ASSEMBLY, COMPLETE (PAGE 1) (46 parts)

Ref	OEM Part #	Part Name
-	1630-7360A13	GEAR HOUSING ASSEMBLY, COMPLETE (LONG SHAFT) Comment: SEE NOTE BELOW SERIAL #3488153-09999999
1	1630-4921A1	GEAR HOUSING ASSEMBLY Comment: SERIAL #3488153-09999999
2	16-58138	STUD GEAR HOUSING TO DRIVE SHAFT HOUSING (3 7/16")
3	16-58136	STUD, WATER PUMP HOUSING TO GEAR HOUSING (2 3/4")
4	31-22756	BEARING, ROLLER - DRIVE SHAFT
5	17-20032	PIN, DOWEL - LOCATING
6	26-33613	SEAL, RUBBER - WATER INTAKE TUBE
7	23-86215	WASHER, NYLON - INTAKE TUBE SEAL
8	35-33425	SCREEN, WATER INTAKE
9	10-28642	SCREW, WATER INTAKE SCREEN TO GEAR HOUSING
10	10-79953Q04	SCREW, GREASE FILLER HOLE
11	12-191833	WASHER, GREASE FILLER HOLE SCREW
12	19643	WASHER, GREASE VENT HOLE SCREW
13	10-28653	SCREW, GREASE VENT HOLE
14	71658A1	SHAFT ASSEMBLY, SHIFT (LONG SHAFT) Comment: SERIAL #3488153-09999999
15	53-22899	RING, RETAINING - SHIFT SHAFT
16	23-30676A1	BUSHING ASSEMBLY, SHIFT SHAFT
17	25-26802	"O" RING, SHIFT SHAFT BUSHING Comment: SERIAL 00000002-0000004,
18	26-30696	OIL SEAL, SHIFT SHAFT BUSHING
19	10-39149	SCREW, SHIFT SHAFT BUSHING RETAINER
20	43-98696	GEAR, PINION
21	14-30377	TAB WASHER, PINION GEAR TO DRIVE SHAFT SCREW
22	10-30376	SCREW, PINION GEAR TO DRIVE SHAFT
23	45-75033A1	DRIVE SHAFT (LONG SHAFT) Comment: SERIAL #3488153-09999999
24	15-30527A1	SHIM ASSEMBLY, BALL BEARING TO GEAR HOUSING (.002-3-5-10)
25	30-33076	BEARING, BALL - DRIVE SHAFT
26	53-30523	RING, RETAINING - BALL BEARING TO DRIVE SHAFT
27	15-30527A1	SHIM ASSEMBLY, BALL BEARING TO GEAR HOUSING (.002-3-5-10)
28	46-46893A3	WATER PUMP HOUSING ASSEMBLY
29	25-29439	"O" RING, WATER PUMP HOUSING
30	26-30900T	OIL SEAL, WATER PUMP HOUSING
31	26-33613	SEAL, WATER INTAKE TUBE
32	32-34293	TUBE, WATER INTAKE
33	70977T	INSERT, WATER PUMP HOUSING
34	28-8M0032835	KEY, IMPELLER DRIVE
35	47-89981	IMPELLER, WATER PUMP
36	46895	PLATE, FACE - WATER PUMP HOUSING TO WATER PUMP COVER
37	93224A1	WATER PUMP COVER ASSEMBLY
38	26-36558	SEAL, WATER PUMP COVER
39	23-13127	WASHER, NYLON - WATER PUMP COVER
40	26-30913	OIL SEAL, WATER PUMP COVER
41	12-20533	WASHER, WATER PUMP HOUSING AND COVER STUDS
42	11-826709109	NUT, WATER PUMP HOUSING AND COVER STUDS
43	25-30526	RING, RUBBER - CENTRIFUGAL SLINGER (DRIVE SHAFT)
44	23-31792T	SLEEVE, GUIDE - WATER INLET TUBE
45	25-48171	"O" RING, UPPER - DRIVE SHAFT Comment: SERIAL 00000000-#3488152

▶GEAR HOUSING ASSEMBLY, COMPLETE (PAGE 2) (27 parts)

Ref	OEM Part #	Part Name
-	1630-7360A13	GEAR HOUSING ASSEMBLY, COMPLETE (LONG SHAFT) Comment: SEE NOTE BEOW SERIAL #3488153-09999999
1	1630-4921A1	GEAR HOUSING ASSEMBLY Comment: SEE PAGE 31 FOR BREAKDOWN SERIAL #3488153-09999999
46	44434	CAM, SHIFT
47	31334	FOLLOWER, SHIFT CAM
48	24-31333	SPRING, COMPRESSION - CAM FOLLOWER
49	15-30522A1	SHIM ASSEMBLY, BALL BEARING TO HOUSING (.002-3-5-10)
50	30-21889	BEARING, BALL - FORWARD GEAR
51	43-48577A3	FORWARD GEAR ASSEMBLY
52	31-22458	BEARING, ROLLER - FORWARD GEAR
53	52-63314	RATCHET, SLIDING CLUTCH (SERIAL #3488153 AND UP)
54	53-32449	RING, RETAINING - CROSS PIN
55	17-30535	PIN, CROSS - RATCHET TO PROPELLER SHAFT
56	44-75667A2	SHAFT, PROPELLER (SERIAL #3488153 AND UP)
57	43-63316	REVERSE GEAR ASSEMBLY (SERIAL #3488153 AND UP)
58	12-30531	WASHER, THRUST - REVERSE GEAR
59	30-21889	BEARING, BALL - REVERSE GEAR
60	15-30532A1	SHIM ASSEMBLY, THRUST WASHER TO HOUSING (.002-3-5-10)
61	25-30529	"O" RING, BEARING CARRIER
62	63317T3	BEARING CARRIER ASSEMBLY Comment: SERIAL #3488153-09999999
63	31-22458	BEARING, ROLLER - BEARING CARRIER
64	26-30530	OIL SEAL, BEARING CARRIER
65	12-30528	WASHER, GEAR HOUSING COVER
66	30537	COVER, GEAR HOUSING
67	86665A1	COLLAR, PROPELLER GUIDE
69	48-47922A10	PROPELLER ASSEMBLY
70	11-64075A1	SPACER, SPLINED - PROPELLER SHAFT
71	11-64075A1	NUT, PROPELLER Comment: SERIAL #3488153-09999999

▶MISCELLANEOUS PARTS/ACCESSORIES (1 parts)

Ref	OEM Part #	Part Name
-	46-46893A6	RESISTANT WATER PUMP KIT

▶PISTON AND CONNECTING ROD ASSEMBLY (9 parts)

Ref	OEM Part #	Part Name
1	608-7395A2	CONNECTING ROD ASSEMBLY
2	10-87374	SCREW, CONNECTING ROD
3	29-26815	BEARING, NEEDLE - CRANKPIN
4	11-20061	NUT, CONNECTING ROD SCREW
5	12-31433	WASHER, NEEDLE BEARING RETAINING
6	29-31505	BEARING, NEEDLE - PISTON PIN
7	719-7391T3	PISTON AND PISTON PIN ASSEMBLY
8	40-21666	LOCK RING, PISTON PIN
9	39-21665A12	RING, PISTON

▶SHIFT CONTROL LINKAGE (18 parts)

Ref	OEM Part #	Part Name
1	59107	HANDLE, SHIFT CONTROL
2	12-8M0204649	WASHER, SHIFT CONTROL SHAFT
3	11-826709109	NUT, SHIFT HANDLE TO SHIFT CONTROL SHAFT
4	23-30678	BUSHING, NYLON - SHIFT CONTROL SHAFT
5	12-37828	WASHER, SHIFT CONTROL SHAFT
6	13-36206	WASHER, WAVE - SHIFT CONTROL SHAFT
7	63673	LEVER, SHIFT CONTROL (REMOTE)
8	17-99615	PIN, SHIFT LEVER TO SHIFT CONTROL SHAFT
9	39047	SHAFT, SHIFT CONTROL
10	43-30802	GEAR, SECTOR - SHIFT CONTROL SHAFT (HORIZONTAL)
11	12-8M0204649	WASHER, SHIFT CONTROL SHAFT
12	11-8267089	NUT, SECTOR GEAR TO SHIFT CONTROL SHAFT
13	24-39627	SPRING, DETENT - SHIFT CONTROL LEVER
14	39601	PLATE, DETENT SPRING
15	10-25764	SCREW, PLATE AND SPRING TO ADAPTOR PLATE (1/2")
16	23-30677	BUSHING, NYLON - UPPER SHIFT SHAFT
17	43-86686A1	GEAR, SECTOR - SHIFT SHAFT (SEE NOTE BELOW)
18	71660	SHIFT SHAFT (SERIAL #3488153 AND UP)

▶STATOR AND IGNITION COMPONENTS (39 parts)

Ref	OEM Part #	Part Name
1	336-4524A1	COVER ASSEMBLY
2	10-60491	SCREW, COVER TO MODULE (5/8")
3	336-4516A2	IGNITION MODULE ASSEMBLY
4	10-59800	SCREW, MODULE TO STATOR (9/16")
5	10-36046	SCREW, MODULE - COIL LEADS (1/4")
6	13-26996	LOCKWASHER, MODULE - IGNITION COIL LEAD TERMINALS
7	11-45076	NUT, MODULE - IGNITION COIL LEAD TERMINALS
8	336-4467A1	COIL, LOW SPEED
9	54-59538	CLIP, COIL RETAINING
10	54-59539	CLIP, COIL RETAINING
11	336-4463	CONDENSER
12	10-62269	SCREW, CONDENSER ATTACHING (7/16")
13	336-4477A1	STATOR ASSEMBLY
14	336-4458	PLATE, STATOR HOLD DOWN
15	10-35400	SCREW, HOLD DOWN PLATE TO STATOR (7/16")
16	15-33910015	SHIM, STATOR PLATE TO UPPER END CAP
17	336-3989	WICK, CAM WIPER - STATOR ASSEMBLY
18	336-4318A2	MAKER ASSEMBLY, STATOR HOUSING
19	10-56266	SCREW, MAKER TO STATOR HOUSING (3/8")
20	34363A4	THROTTLE CAM BRACKET ASSEMBLY
21	54-34449	CLAMP, THROTTLE CAM BRACKET
22	10-53296	SCREW, CAM BRACKET TO STATOR PLATE (1/2")
23	10-34696	SCREW, THROTTLE CONTROL LEVER TO CAM BRACKET (3/4")
24	12-34392	WASHER, CONTROL LEVER SCREW
25	11-28656	NUT, CONTROL LEVER SCREW
26	63839	CAM, THROTTLE Comment: SERIAL #3488153-09999999
27	10-28707	SCREW, THROTTLE CAM TO CAM BRACKET (1/2")
28	56319A6	LEAD ASSEMBLY, STOP SWITCH (SALMON - 15 3/4")
29	59060	BOOT, LEAD ASSEMBLY
30	56757A3	LEAD ASS'Y CONDENSER TO BOTTOM COWL (BLACK - 14 1/2")
31	10-62568	SCREW, STATOR GROUND WIRE TO BOTTOM COWL
32	56318A6	LEAD ASSEMBLY, MODULE TO IGNITION COIL (GREEN - 10 3/4")
33	56318A5	LEAD ASSEMBLY, MODULE TO IGNITION COIL (GREEN 13 7/8")
34	38938	BOOT, LEAD ASSEMBLY
35	56317A3	CABLE ASSEMBLY, STATOR HOUSING (BROWN - 15 1/4")
36	38938	BOOT, CABLE
37	336-4460	INSULATOR, CABLE TO CONTACT HOUSING
38	11-56325	NUT, CABLE INSULTOR
39	56762	STA-STRAP

▶STEERING HANDLE ASSEMBLY (20 parts)

Ref	OEM Part #	Part Name
-	60850A6	STEERING HANDLE ASSEMBLY, COMPLETE
1	60854	GRIP, HANDLE - THROTTLE
2	62251	CAP, HANDLE THROTTLE
3	66393	SHAFT, THROTTLE
4	66394A1	HANDLE, THROTTLE SHAFT
5	12-62252	WASHER, THROTTLE HANDLE TO STEERING ARM
6	60850	ARM, STEERING HANDLE
7	43-60852	GEAR, BALL - THROTTLE SHAFT
8	17-27088	PIN, BALL GEAR TO THROTTLE SHAFT
9	48003	PIVOT, STEERING HANDLE TO BRACKET
10	15-48002015	SHIM, STEERING HANDLE PIVOT TO BRACKET (.015)
11	10-64074	SCREW, STEERING HANDLE TO ARM BRACKET (5/8")
12	60857A2	UNIVERSAL JOINT ASSEMBLY
13	43-60852	GEAR, BALL - UNIVERSAL JOINT
14	17-27088	PIN, BALL GEAR TO UNIVERSAL JOINT
15	61629A1	BRACKET ASSEMBLY, STEERING ARM
16	10-62233	SCREW, DETENT SPRING TO STEERING ARM BRACKET (5/8")
17	24-72847	SPRING, DETENT - STEERING HANDLE
18	10-30679	SCREW, STEERING ARM BRACKET TO SADDLE (2 1/4")
19	11-8M0207775	NUT, STEERING ARM BRACKET FASTENING SCREW

▶THROTTLE CONTROL LINKAGE (20 parts)

Ref	OEM Part #	Part Name
1	23-31011	BUSHING, NYLON - THROTTLE CONTROL SOCKET Comment: SERIAL 00000000-#3488152
2	43-60856	GEAR, HORIZONTAL - THROTTLE CONTROL SOCKET
3	60885T	HOUSING, THROTTLE CONTROL
4	10-96138	SCREW, THROTTLE CONTROL HOUSING TO BOTTOM COWL (5/8")
5	63308A1	FOLLOWER ASSEMBLY, NEUTRAL SPEED LIMITER
6	10-20653	SCREW, LIMITER FOLLOWER TO BOTTOM COWL (1 1/8") Comment: SERIAL #3488153-09999999
7	12-8M0174819	WASHER, SPEED LIMITER FOLLOWER SCREW
8	24-39042	SPRING, NEUTRAL SPEED LIMITER FOLLOWER
9	23-63320	BUSHING, SPEED LIMITER FOLLOWER SCREW Comment: SERIAL #3488153-09999999
10	36017	STOP, NEUTRAL SPEED LIMITER
11	10-28710	SCREW, NEUTRAL SPEED LIMITER STOP TO FOLLOWER (5/8")
12	12-24676	WASHER, NEUTRAL SPEED LIMITER SPEED LIMITER STOP SCREW
13	63697A1	GEAR AND SHAFT, THROTTLE CONTROL Comment: SERIAL 00000000-#3488152
13 & 1	63697A1	GEAR AND SHAFT, THROTTLE CONTROL Comment: SERIAL 0#388153-0Z999999
14	15-64653A1	SHIM ASSEMBLY, GEAR AND SHAFT (LOWER)
15	23-61615	BUSHING, NYLON - GEAR AND SHAFT TO BOTTOM COWL Comment: SERIAL 00000000-#3488152
16	63697A1	LEVER, THROTTLE CONTROL Comment: SERIAL 00000000-#3488152
17	17-27088	PIN, ROLL - THROTTLE CONTROL LEVER TO THROTTLE CONTROL SHAFT
18	10-23015	SCREW, ADJUSTING - THROTTLE ADVANCE (1")
19	11-68219	NUT, LOCK - THROTTLE ADVANCE ADJUSTING SCREW

▶TOP COWL AND STARTER ASSEMBLY (43 parts)

Ref	OEM Part #	Part Name
1	2123-3953A2	TOP COWL ASSEMBLY
2	56377	SEAL, TOP COWL (42 1/8")
3	39080	BLANKET, SOUND ABSORBING - TOP COWL Comment: SERIAL 00000000-#3488152
4	39071	BLANKET, SOUND ABSORBING - TOP COWL
5	25-39086	GROMMET, COWL LATCH - TOP COWL
6	2128-2667A8	COVER ASSEMBLY, FRONT
7	39039	STRIP, RUBBER - FRONT COVER
8	23-39578	SPACER, FRONT COVER STUD
9	11-8267089	NUT, FRONT COVER STUD
10	63307A2	STARTER HOUSING ASSEMBLY Comment: SERIAL #3488153-09999999
11	57821	INSERT, ROPE GUIDE - STARTER HOUSING
12	39043	SEAL, STARTER HOUSING TO TOP COWL
13	10-22968	SCREW, STARTER HOUSING TO CYLINDER BLOCK (1 1/4")
14	55860	PULLEY, STARTER CABLE
15	10-28789	SCREW, CABLE PULLEY TO STARTER HOUSING (3/4")
16	12-22887	WASHER, CABLE PULLEY SCREW
17	23-309772	SPACER, CABLE PULLEY
18	39027	SHIELD, TOP COWL - REAR
19	10-38055	SCREW, REAR SHIELD TO TOP COWL (5/8")
20	13-26996	LOCKWASHER, REAR SHIELD SCREW
21	39088A1	COWL LATCH ASSEMBLY, TOP COWL
22	24-59174	SPRING, COMPRESSION - COWL LATCH
23	17-39095	PIN, ROLL - SPRING TO COWL LATCH
24	10-69069	SCREW, COWL LATCH TO TOP COWL (3/4")
25	14-20165	TAB WASHER, SHEAVE SHAFT NUT
26	11-20166	NUT, SHEAVE SHAFT (LEFT HAND THREAD)
27	20155	RETAINER, STARTER SPRING
28	24-29340T02	SPRING, STARTER REWIND
29	23-28912	BUSHING, STARTER SPRING GUIDE
30	50-93696A2	STARTER SHEAVE ASSEMBLY
31	17-22896	PIN, RETAINER - STARTER CABLE
32	13-36206	WASHER, WAVE - STARTER PAWL
33	30596	PAWL, STARTER
34	23-28919	BUSHING, NYLON - SHEAVE SHAFT SPACER
35	23-61005	SPACER, SHEAVE SHAFT
36	26179	RETAINER, SHEAVE SHAFT TO STARTER SHEAVE
37	12-35559	WASHER, SHEAVE SHAFT RETAINER
38	13-20160	WASHER, WAVE - RETAINER TENSION
39	30595	PLATE, RETAINER - STARTER PAWL
40	35558	SHAFT, SHEAVE
41	50-12066Q10	STARTER CABLE ASSEMBLY
42	30782	HANDLE, STARTER CABLE
43	79470A1	RETAINER, STARTER CABLE AND HANDLE

100-Hour / Annual Service Checklist

Regular maintenance keeps your Mercury 75 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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