Mercury 75 EFI (4-STROKE) (1B172291 THRU 1B366822) Parts & Diagrams

🔎 Mercury 75 EFI (4-STROKE) Reference Library — Exploded parts diagrams (34 diagrams), specifications, common issues, and maintenance checklist.

The Mercury 75 EFI (4-STROKE) 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 EFI (4-STROKE):

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 EFI (4-STROKE).

▶Accessories (1 parts)

Ref	OEM Part #	Part Name
0	92876A9	EXTENSION KIT, Dual Engine Comment: (DUAL)

▶Bottom Cowl (26 parts)

Ref	OEM Part #	Part Name
1	100-878587A1	BOTTOM COWL ASSEMBLY (Port)
2	100-8M0113913	BOTTOM COWL ASSEMBLY (Starboard)
3	8M0109217	SEAL, Cowl (41.00 Inches)
4	878547T	INSERT
5	10-82130040	SCREW, (M6 x 40)
6	831209	RETAINER
7	858742	BOOT, Idle Exhaust
8	8M0039078	GROMMET
9	22-827948	FITTING
10	12-855576	WASHER
11	54-816311T	TIE STRAP, (8.00 Inches)
12	32-881535	HOSE, (32.00 Inches)
13	32-8M0108355	HOSE, (57.00 Inches Bulk) (Cut to 5 Inches)
14	32-9912688	TUBING, (36.00 Inches Bulk) (Cut to 21 Inches)
15	22-817518	TEE
16	10-82130020	SCREW, (M6 x 20)
17	25-889724	GROMMET
18	87-8M0042301	SWITCH ASSEMBLY
19	889740A02	HANDLE KIT
20	10-1993716	SCREW, (M6 x 16)
21	23-33589	BUSHING
22	25-48462	O-RING, (.614 x .070)
23	8219423	PAWL
24	12-69057	WASHER, (.281 x .734 x .063)
25	13541	PLUG, Male
26	22-898029	FITTING, Reducer

▶Crankshaft, Pistons and Connecting Rods (13 parts)

Ref	OEM Part #	Part Name
-	8M0094898	POWERHEAD ASSEMBLY
1	2406-8M0103181	CRANKSHAFT
2	26-804099003	SEAL, Oil
3	26-804100003	SEAL, Oil
4	31-804101T20	BEARING Comment: (Red)
5	31-804102T30	BEARING Comment: (Red)
6	31-804103T20	BEARING Comment: (Red)
7	2715-880895T03	PISTON ASSEMBLY Comment: (.25mm O/S)
8	10-804105	BOLT
9	31-804106T31	BEARING Comment: (Red)
10	39-880898T02	RING SET, Piston Comment: (.25mm Oversize)
11	28-804153	KEY
12	28-8261001	KEY

▶Cylinder Block and Crankcase (42 parts)

Ref	OEM Part #	Part Name
-	881310T10	CYLINDER HEAD ASSEMBLY Comment: (100)
1	892-881422T04	CYLINDER BLOCK ASSEMBLY Comment: SN# 1B227000 & Up
2	17-82364M	PIN, Dowel
3	10-804072	BOLT, (M10 x 135)
4	10-8M0101617	BOLT, (M8 x 55)
5	804073	LIFTING EYE
6	10-8257021	BOLT, (M6 x 20)
7	804149	PLATE, Valve
8	19-825953	PLUG, (M14 x 12)
9	27-81990M	GASKET
10	35-8M0162830	FILTER, Oil
11	10-804097	BOLT
12	27-858732002	GASKET, Cylinder Block
13	881600	CAP, Rubber
14	881424T02	COVER, Exhaust-Outer
15	27-804076003	GASKET Comment: SN# 1B227000 & Up
16	10-881427	BOLT, (M6 x 30)
17	11761001	ANODE
18	10-82532M	SCREW
19	10-881425	SCREW
20	27-881426	GASKET
21	56762	TIE STRAP, (4.00 Inches)
22	887847	COVER
23	25-804086	GROMMET
24	804079001	ANODE
25	10-881431	BOLT, (M8 x 40)
26	10-84058M	BOLT, (M6 x 20)
27	12-82214M	WASHER
28	804083001	COVER Comment: SN# 1B227000 & Up
29	27-804084	GASKET
30	24-804081	SPRING
31	804080001	VALVE, Pressure Control
32	25-804082	GROMMET
33	10-881428	BOLT, (M6 x 16)
34	32-804088	HOSE
35	54-804089	CLIP
36	56762	TIE STRAP, (4.00 Inches)
37	16-8587331	STUD
38	12-8M0214963	WASHER, (.406 x .750 x .105) Stainless Steel
39	11-40140	NUT, (M10)
40	10-81893435	SCREW, (M8 x 35)
41	54-881353001	CLAMP

▶Cylinder Head (34 parts)

Ref	OEM Part #	Part Name
-	881310T10	CYLINDER HEAD ASSEMBLY Comment: (100)
1	881310T04	CYLINDER HEAD ASSEMBLY
2	17-804110	PIN, Guide
3	19-804111	PLUG
4	10-804112	BOLT, (M7 x 48)
5	17-804113	PIN, Dowel
6	10-804114001	BOLT AND WASHER
7	10-881311	BOLT, (M10 x 145)
8	23-8M0070515	COLLAR
9	27-8041151	GASKET
10	10-881312	BOLT, (M8 x 55)
11	887847	COVER Comment: (Use with Design I Anode)
12	97-804085A01	COVER/ANODE KIT Comment: (Use with Design II Anode)
13	804079001	ANODE Comment: (Design I)
14	97-804085A01	COVER/ANODE KIT (Included With Reference #12) Comment: (Design II)
15	25-804086	GROMMET (Included With Reference #12)
16	10-8524741	BOLT, (M6 x 20) Comment: (Use with Design I Anode)
17	10-84830M	BOLT (Included With Reference #12) Comment: (Use with Design II Anode)
18	27-95610	GASKET (Included With Reference #12) Comment: (Use with Design II Anode)
19	10-8248326	SCREW, (M6 x 25 MM)
20	881313T02	COVER ASSEMBLY, Cylinder Head
21	804119	COVER, Breather
22	10-804120	SCREW, (M4 x 8)
23	27-804123001	GASKET
24	25-855690	GROMMET
25	10-858530	BOLT, (M6 x 30)
26	859578A1	PLUG ASSEMBLY, Oil
27	25-8M0204673	O-RING, (.921 x .139)
28	858752001	COVER
29	10-1993716	SCREW, (M6 x 16)
30	10-881431	BOLT, (M8 x 40)
31	33-859495Q	SPARK PLUG, (NGK-LFR5A-11)
32	855676004	THERMOSTAT Comment: (100)
33	8041271	THERMOSTAT COVER

▶Driveshaft Housing (24 parts)

Ref	OEM Part #	Part Name
1	1507-858576T2	HOUSING ASSEMBLY, Driveshaft
2	16-9035015	STUD, (M10 x 227) Comment: (X-Long)
3	16-8M0034462	STUD, (M10 x 190) Comment: (X-Long)
4	12-8M0214963	WASHER, (.406 x .750 x .105) Stainless Steel
5	11-40140	NUT, (M10)
6	22-85822A15	PICKUP ASSEMBLY, Speedometer
7	22-433351	CONNECTOR, 90 Degree - With Vibraseal
8	22-85822T	CONNECTOR, Straight
9	44343T1	MOUNT
10	10-898835001	BOLT, (M12 x 154)
11	12-30119	WASHER, (.875 Inch Outside Diameter)
12	11-8M0204662	NUT, (M12)
13	88238A10	CABLE ASSEMBLY, Ground, To Swivel Bracket
14	10-41508	SCREW, (.250-20 x .500) Stainless Steel
15	858916T	CLAMP
16	10-889833025	SCREW, (M8 x 25 MM)
17	8M0142713	CAP
18	23-859550	BUSHING
19	17-24873	PIN, Alignment
20	22-855622	FITTING
21	12092A3	SPACER KIT Comment: (X-Long)
22	17-43044	PIN, Dowel - Without Hole (.375 x .625) Comment: (X-Long)
23	23-813745	SPACER Comment: (X-Long)
24	54-816311T	TIE STRAP, (8.00 Inches)

▶Electrical Components, Engine Wiring Harness (21 parts)

Ref	OEM Part #	Part Name
-	8M0094898	POWERHEAD ASSEMBLY
1	84-881364A07	HARNESS ASSEMBLY, Engine Comment: (80/100)
2	88-832969T20	FUSE, 20 Ampere
3	88-8M0057159	FUSE, 30 Ampere
4	891824010	COVER, Fuse (Yellow)
5	891824020	COVER, Fuse (Green)
6	54-881530002	CLAMP
7	10-804604	BOLT, (M6 x 20)
8	10-804604	BOLT, (M6 x 20)
9	54-816311T	TIE STRAP, (8.00 Inches)
10	8M0059045	PLATE
11	10-804602	BOLT, (M6 x 12)
12	8M0059044	BRACKET
13	10-84368M	BOLT
14	12-82214M	WASHER
15	8M0059047	PLATE
16	10-804602	BOLT, (M6 x 12)
17	8M0059046	PLATE
18	10-804602	BOLT, (M6 x 12)
19	888326001	COVER
20	15976M	EXTENSION Comment: (80/100)

▶Electrical Components, Ignition Coil and ECU Mounting (23 parts)

Ref	OEM Part #	Part Name
1	339-880892001	COIL ASSEMBLY, Ignition
2	10-853536	BOLT, (M6 x 25)
3	84-804272A1	CABLE SET, Hi Tension
4	NSS	NOT SOLD SEPARATE, High Tension Lead
5	NSS	NOT SOLD SEPARATE, High Tension Lead
6	NSS	NOT SOLD SEPARATE, High Tension Lead
7	54-804277	CLAMP
8	54-804276	CLAMP
9	54-804276	CLAMP
10	54-804277	CLAMP
11	888239002	PLATE
12	54-888588001	CLAMP
13	54-888588002	CLAMP
14	25-804082001	GROMMET
15	10-84368M	BOLT
16	12-82214M	WASHER
17	880891T17	ECU, Engine Control Unit Comment: (100 EU)
18	25-881304	GROMMET
19	23-804344003	COLLAR
20	10-804270	BOLT, (M6 x 28)
21	881346T	RECTIFIER/REGULATOR ASSEMBLY
22	10-804604	BOLT, (M6 x 20)
23	10-853536	BOLT, (M6 x 25)

▶Electrical Components, Relay Mounting (48 parts)

Ref	OEM Part #	Part Name
1	881363A02	COVER/BRACKET KIT Comment: SN# 1B227000 & Up
2	881359002	BRACKET Comment: SN# 1B227000 & Up
3	881350T01	RELAY ASSEMBLY
4	10-881351	SCREW
5	804289	PULLER, Fuse
6	10-804270	BOLT, (M6 x 28)
7	25-881304	GROMMET
8	54-881361	CLAMP
9	25-881304	GROMMET
10	23-804344003	COLLAR Comment: SN# 1B227000 & Up
11	54-881360	CLAMP
12	881352T	RELAY
13	10-84088M	SCREW, (M6 x 10)
14	13-82212M	LOCKWASHER
15	12-82214M	WASHER
16	85-804284001	BOOT
17	54-881353	CLAMP
18	10-8813511	SCREW
19	881356001	RELAY ASSEMBLY
20	10-84088M	SCREW, (M6 x 10)
21	13-82212M	LOCKWASHER
22	12-82214M	WASHER
23	85-826574	BOOT
24	10-8257021	BOLT, (M6 x 20)
25	84-881357001	WIRE, Lead
26	84-858740T06	HARNESS ASSEMBLY, Remote Adaptor (16.00 Inches) 10 Pin Female to 14 Pin Female Comment: SN# 1B227000 & Up
27	8M0026570	TACH MODULE
28	25-881304001	GROMMET
29	54-816311T	TIE STRAP, (8.00 Inches)
30	37-8272822	DECAL, Warning, High Voltage
31	37-881865	DECAL, Caution-Start in Gear Comment: (Start In Gear)
32	84-88439A33	CABLE ASSEMBLY, Positive - Battery
33	84-88439A10	CABLE ASSEMBLY, Negative - Battery
34	11-401388	NUT, (M8) Stainless Steel
35	10-8M0204741	SCREW, (M6 x 20) Stainless Steel
36	84-858723T1	HARNESS ASSEMBLY
37	84-858914T1	HARNESS ASSEMBLY
38	859249T1	CONNECTOR
39	897543A01	CAP ASSEMBLY, Connector - 2 Way
40	10-8248324	SCREW, (M6 x 16)
41	54-881530013	CLAMP
42	23-852473	COLLAR
43	10-881351	SCREW
44	54-881530014	CLAMP
45	804260001	BRACKET
46	25-97687M	GROMMET
47	10-84368M	BOLT
48	12-82214M	WASHER

▶Exhaust Plate (37 parts)

Ref	OEM Part #	Part Name
1	897580A05	ADAPTOR PLATE ASSEMBLY
2	17-23784	PIN, Dowel
3	22-897501	FITTING
4	21-817519A2	CHECK VALVE ASSEMBLY, Drain
5	25-19565002	GROMMET
6	27-8585831	GASKET
7	858572T01	SUMP, Oil
8	858584A1	TUBE ASSEMBLY, Exhaust
9	25-881295	O-RING
10	25-89417004	GROMMET
11	32-8M0026129	TUBE, Water Comment: (X-LONG)
12	814080001	SEAL (UPPER)
13	858571T	TUBE, Oil Pick Up
14	25-859082	O-RING
15	10-8M0204741	SCREW, (M6 x 20) Stainless Steel
16	10-8M0214957	SCREW, (M6 x 30)
17	8M0039073	SEAL
18	8288181	PLUG, Drain
19	27-8M0204692	GASKET
20	10-82483213	SCREW, (M6 x 60)
21	8596021	DIPSTICK
22	10-898442	SCREW, (M8 x 50)
23	22-479452	PLUG
24	22-889567	PLUG, (.500-14)
25	23-27132	BUSHING
26	888835A1	SHIFT SHAFT
27	888840	SHIFT LINK
28	888917	ROLLER
29	23-891658	BUSHING
30	888823001	SHIFT DETENT ASSEMBLY
31	18-82053M	PIN, Hair
32	12-888832	WASHER
33	12-69056	WASHER, (.255 x .620 x .030) Stainless Steel
34	18-26953	COTTER PIN
35	32-897730	HOSE, Fuel Vent (28.00 Inches)
36	54-816311T	TIE STRAP, (8.00 Inches)
37	898006	STRAP, Retaining

▶Flywheel (23 parts)

Ref	OEM Part #	Part Name
-	8M0094898	POWERHEAD ASSEMBLY
1	881343T02	COVER, Flywheel
2	25-888304	GROMMET
3	25-855690	GROMMET
4	11-804265A1	NUT/WASHER KIT, Hex (36 mm)
5	12-8042641	WASHER, Plate
6	280-881335T01	FLYWHEEL ASSEMBLY
7	881337001	COIL, Pulser
8	398-881336A03	STATOR ASSEMBLY
9	10-881338	SCREW, (M6 x 28)
10	10-881339001	SCREW AND WASHER
11	54-881340	CLAMP
12	881341	ROTOR
13	17-825010	PIN, Dowel
14	10-804603	BOLT, (M6 x 30)
15	804266001	PLATE, Timing
16	10-804267	SCREW
17	NSS	NOT SOLD SEPARATE, Decal-Warning-Neutral
18	NSS	NOT SOLD SEPARATE, Decal-Waring-Sprinning Flywheel
19	NSS	NOT SOLD SEPARATE, Decal-Servicing Referral
20	NSS	NOT SOLD SEPARATE, Decal-Servicing Referral
21	NSS	NOT SOLD SEPARATE, Decal-Engine Oil/Valve
22	NSS	NOT SOLD SEPARATE, Decal-Emergency Starting

▶Fuel Hose Routings (23 parts)

Ref	OEM Part #	Part Name
1	10-852776018	BOLT AND WASHER
2	56762	TIE STRAP, (4.00 Inches)
3	54-881530005	CLAMP
4	32-804162005	TUBING
5	56762	CLAMP
6	32-804162018	TUBING Comment: SN# 1B227000 & Up
7	896354	CANNISTER ASSEMBLY
8	881542004	HOLDER
9	10-826957M	BOLT
10	12-82214M	WASHER
11	881542005	BRACKET
12	25-804304	GROMMET
13	23-811078M	COLLAR
14	10-804270	BOLT, (M6 x 28)
15	56762	TIE STRAP, (4.00 Inches)
16	32-804162003	TUBING
17	54-8M0059039	CLAMP
18	10-84088M	SCREW, (M6 x 10)
19	12-82214M	WASHER
20	35-888279001	FILTER, Fuel
21	8M0059043	BRACKET
22	10-91772M	BOLT
23	12-82214M	WASHER

▶Fuel Pump (31 parts)

Ref	OEM Part #	Part Name
-	881310T10	CYLINDER HEAD ASSEMBLY Comment: (100)
1	8M0091468	PUMP ASSEMBLY, Fuel
2	NSS	NOT SOLD SEPARATE, Body
3	24-881544	SPRING
4	881545001	PLUNGER
5	24-881546	SPRING
6	881547	DIAPHRAGM
7	17-881548	PIN
8	NSS	NOT SOLD SEPARATE, Body
9	NSS	NOT SOLD SEPARATE, Diaphragm
10	NSS	NOT SOLD SEPARATE, Body
11	10-881550	SCREW
12	11-881333	NUT
13	25-8M0050719	O-RING
14	56762	TIE STRAP, (4.00 Inches)
15	10-804256	BOLT, (M6 x 30)
16	32-881543001	TUBING
17	881542006	BRACKET
18	10-811188T	BOLT, (M6 x 16)
19	11-82382M	NUT
20	35-881538T02	FILTER ASSEMBLY
21	35-8M0168897	ELEMENT
22	25-826966T	O-RING
23	881541	FLOAT
24	881539	CUP
25	56762	TIE STRAP, (4.00 Inches)
26	32-8M0108349	TUBING, (.312) (70.00 Inches Bulk) (Cut to 55 Inches)
27	54-816311T	TIE STRAP, (8.00 Inches)
28	22-822769	CONNECTOR
29	NSS	NOT SOLD SEPARATE, Cap
30	32-828547T1	CONDUIT, (.500 Inside Diameter x 3.00 Feet Bulk)

▶Gear Housing(Driveshaft)(2.33:1 Gear Ratio) (44 parts)

Ref	OEM Part #	Part Name
-	31-803496T2	BEARING/SEAL KIT Comment: (Without Forward Bearing)
0	1600-888845T04	GEAR HOUSING ASSEMBLY, Complete (4.25 Inch/107.95 mm Torpedo Diameter) Comment: (X-Long)
1	1600-888845T	GEAR HOUSING ASSEMBLY, Basic
2	17-8M0084244	PIN, Dowel - With Hole (.375 x .625) (Front)
3	43046	TUBE, Oiler
4	10-79953Q04	SCREW KIT, (.375-16 x .250) Drain
5	12-191833	SEAL
6	17-43044	PIN, Dowel - Without Hole (.375 x .625) (Rear)
7	31640T07	TRIM TAB
8	10-825427	SCREW, (.437-14 x 1.250) Stainless Steel
9	12-451761	WASHER, (.453 x .812 x .105) Black Oxide
10	43040T1	CARRIER ASSEMBLY
11	NSS	NOT SOLD SEPARATE, Needle Bearing
12	97-826134Q	ANODE
13	11-401386	NUT, (M6) Stainless Steel
14	10-4000333	SCREW, (M6 x 40)
15	NSS	NOT SOLD SEPARATE, Pinion Gear (12 TEETH) Comment: (Part of 43-882813A3)
16	11-35921	NUT, (.625-18)
17	31-883047A1	BEARING ASSEMBLY, Tapered Roller
18	15-44492A1	SHIM SET
19	45-878575T1	DRIVESHAFT ASSEMBLY Comment: (X-Long)
20	42461A1	SLEEVE/RING KIT
21	NSS	NOT SOLD SEPARATE, Seal Ring
22	43055A4	COVER ASSEMBLY, Water Pump
23	27-430331	GASKET
24	27-8M0214931	GASKET
25	26-43036	SEAL, Oil (Lower)
26	26-43035	SEAL, Oil (Upper)
27	27-8172771	GASKET
28	817275A2	HOUSING KIT, Upper Water Pump
29	8M0204709	FACEPLATE
30	10-82684430	SCREW, (M6 x 30)
31	430232	SEAL
32	28-8M0204723	KEY
33	47-43026T2	IMPELLER
34	10-82684425	SCREW, (M6 x 25)
35	26-861415	FACE SEAL
36	884565A00	SHIFT SHAFT ASSEMBLY Comment: (X-Long)
37	53-29641	E RING
38	23-43052A4	BUSHING ASSEMBLY
39	25-8M0204681	O-RING, (1.424 x .103)
40	26-8M0204708	SEAL, Oil
41	10-82684425	SCREW, (M6 x 25)
42	23-891637	BUSHING

▶Gear Housing, Propeller Shaft - 2.33:1 Gear Ratio (33 parts)

Ref	OEM Part #	Part Name
-	31-803496T2	BEARING/SEAL KIT Comment: (Without Forward Bearing)
0	1600-888845T04	GEAR HOUSING ASSEMBLY, Complete (4.25 Inch/107.95 mm Torpedo Diameter) Comment: (X-Long)
1	1600-888845T	GEAR HOUSING ASSEMBLY, Basic
2	8227731	INSERT, Threaded
3	888807	FOLLOWER ASSEMBLY, Cam
4	8M4504018	CAM, Shift
5	888806	ROD, Clutch Actuator
6	17-8M0084243	PIN, Cross
7	17-8M0084245	PIN, Spring Locator
8	24-79910	SPRING
9	12-78910	WASHER
10	15-44491A1	SHIM SET
11	31-30894A1	BEARING SET, Cup And Cone
12	NSS	NOT SOLD SEPARATE, Cup
13	43-882813A3	GEAR KIT, Forward And Pinion 28 Teeth
14	31-30895T	BEARING, Needle
15	53-856823	RING, Retaining
16	52-888805T	CLUTCH
17	44-8M0140444	PROPELLER SHAFT
18	24-30893	SPRING
19	43-889990T	GEAR, Reverse (28 Teeth)
20	8M0168901	CARRIER ASSEMBLY, Bearing
21	25-8M0214974	O-RING, (3.609 x .139)
22	31-30956T	BEARING, Needle
23	26-8M0205728	SEAL, Oil (INNER)
24	26-8M0205729	SEAL, Oil (OUTER)
25	31-12578T	BEARING, Roller
26	12-12577	THRUST WASHER
27	31-12576	BEARING, Thrust
28	16-8M0034456	STUD, (M8 x 48)
29	12-855941	WASHER, (.323 x .590 x .112) Stainless Steel
30	11-401378	NUT, (M8)
31	NSS	NOT SOLD SEPARATE, Decal-Gear Housing Pinion Identification

▶Intake (18 parts)

Ref	OEM Part #	Part Name
-	881440T03	INTAKE ASSEMBLY, Complete
1	880886T01	MANIFOLD ASSEMBLY
2	27-881433001	GASKET
3	27-881433002	GASKET
4	881441T05	THROTTLE BODY ASSEMBLY
5	880884001	SENSOR ASSEMBLY, Throttle
6	10-881502001	SCREW
7	25-881504001	O-RING
8	10-881510001	BOLT
9	880883T02	CONTROL VALVE ASSEMBLY
10	25-881448001	O-RING
11	10-881449001	SCREW
12	880885001	SENSOR ASSEMBLY
13	54-881530001	CLAMP
14	880887T02	INJECTOR ASSEMBLY
15	25-885183A02	O-RING KIT
16	881518T01	FUEL RAIL
17	10-881532001	BOLT

▶Intake Silencer (26 parts)

Ref	OEM Part #	Part Name
1	881436003	SILENCER ASSEMBLY, Intake Comment: (100)
2	10-881438003	BOLT AND WASHER
3	23-887900	BUSHING
4	23-881332003	COLLAR
5	896353	BELLOWS
6	54-881530002	CLAMP
7	32-804162001	BREATHER PIPE
8	54-881530003	CLAMP
9	54-804163	CLAMP
10	10-91772M	BOLT
11	12-82214M	WASHER
12	54-881530004	CLAMP
13	10-855810001	BOLT
14	54-804089	CLIP
15	17-804160	PIN
16	8M0059040	BRACKET
17	10-804124	BOLT
18	12-82214M	WASHER
19	8M0059042	BRACKET
20	10-84058M	BOLT, (M6 x 20)
21	12-82214M	WASHER
22	10-881438001	BOLT AND WASHER
23	10-881438002	BOLT AND WASHER
24	10-41893M	BOLT
25	23-881332002	COLLAR
26	10-881438002	BOLT AND WASHER

▶Intake/Exhaust Valves (24 parts)

Ref	OEM Part #	Part Name
-	881310T10	CYLINDER HEAD ASSEMBLY Comment: (100)
1	804128T	VALVE, Intake
2	804129T	VALVE, Exhaust
3	804130	SEAT
4	26-804136	SEAL
5	26-804137	SEAL
6	24-804131	SPRING, Valve
7	804132	RETAINER
8	28-804135	COTTER VALVE
9	804138T	LIFTER, Valve
10	15-80460880	SHIM Comment: (2.975)
11	2407-804139002	CAMSHAFT Comment: (100)
12	17-804141	PIN, Dowel
13	2407-8M0057172	CAMSHAFT
14	26-804144001	SEAL, Oil
15	43-804142T	GEAR, Driven
16	10-804143001	BOLT, (M10 x 35)
17	57-804145	V BELT
18	804146	TENSIONER
19	24-804147	SPRING
20	32-804148	HOSE
21	10-804150	BOLT, (M10 x 45)
22	11-881314003	NUT, (M40)
23	43-804151T01	GEAR, Drive

▶Lube Chart (1 parts)

Ref	OEM Part #	Part Name
-	NOPART	NO PARTS LIST

▶Oil Pump (20 parts)

Ref	OEM Part #	Part Name
1	25-62705001	O-RING
2	17-41275M	PIN, Dowel
3	881900T03	MOUNT
4	10-898487	BOLT, (M12 x 175)
5	12-32834	WASHER, Neoprene
6	12-8M0204648	WASHER, (1.5 x 3.05 x 0.13) Stainless Steel
7	11-896963	NUT, (M12)
8	10-898442	SCREW, (M8 x 50)
9	858579T3	PUMP, Oil
10	10-8M0052670	BOLT, (M6 x 45)
11	26-804349	SEAL
12	896843T01	BRACKET, Shift Link
13	10-42975	DRIVE SCREW
14	10-82130020	SCREW, (M6 x 20)
15	896844	LATCH, Control Cable
16	824015	CUP, Barrel Retainer, Barrel Retainer (Small)
17	87-879996A2	SWITCH
18	10-88075020	SCREW, (M3 x 20)
19	8M0043168	SEAL
20	17-23784	PIN, Dowel

▶Power Trim Components (19 parts)

Ref	OEM Part #	Part Name
-	25-893914A02	O-RING KIT (COMPLETE TRIM)
1	8M0171821	SHOCK ROD KIT
2	25-8M0171819	O-RING KIT, Rebuild
3	8M0171822	PISTON ASSEMBLY, Memory
4	893916A01	CYLINDER ASSEMBLY
5	893905A02	VALVE KIT, Trim Limit
6	893906A02	PUMP ASSEMBLY
7	893907A02	MOTOR KIT
8	22-8134351	PLUG
9	893929A01	MANUAL RELEASE ASSEMBLY
10	893909A02	MANIFOLD KIT
11	10-809876A1	SCREW KIT (MOTOR)
12	88238A18	CABLE ASSEMBLY
13	809877A1	DRIVESHAFT/SEAL KIT
14	35-893912A02	FILTER KIT
15	893913A02	POPPET KIT
16	17-821539	PIN, Trilobe
17	17-818898	PIN, Anchor
18	99625002	SHAFT

▶Powerhead Gasket Set Components (1 parts)

Ref	OEM Part #	Part Name
-	26-804100003	SEAL, Oil, Crankshaft-Lower

▶Sensors (13 parts)

Ref	OEM Part #	Part Name
-	8M0094898	POWERHEAD ASSEMBLY
1	804294002	PLATE
2	10-811188T	BOLT, (M6 x 16)
3	804295T	THERMOSENSOR
4	804296	RETAINER
5	27-8042971	GASKET
6	10-811188T	BOLT, (M6 x 16)
7	54-83577M	CLAMP
8	10-84088M	SCREW, (M6 x 10)
9	87-8043071	SWITCH, Oil Pressure
10	881366003	BRACKET Comment: (75/90)
11	10-91772M	BOLT Comment: (75/90)
12	12-82214M	WASHER Comment: (75/90)

▶Service/Support Material (1 parts)

Ref	OEM Part #	Part Name
-	92-8M0078630	OIL, FCW Synthetic 4-Stroke, 4 Liter, Mercury

▶Starter Motor (32 parts)

Ref	OEM Part #	Part Name
-	50-881368T2	STARTER MOTOR ASSEMBLY
1	804320	STOP SET, Pinion
2	804319	PINION
3	804331T	COVER
4	10-804336	BOLT, (M6 x 52)
5	804332	LEVER KIT
6	881371T1	RELAY, Starter
7	804334	COVER
8	804321T1	GEAR KIT
9	804322	CLUTCH
10	12-804330	WASHER KIT
11	804324	BRACKET
12	804326	RING GEAR
13	27-804327	GASKET
14	31-804325	BEARING
15	804323	SHAFT, Pinion
16	43-804329001	GEAR, Idler
17	804328	BRACKET
18	804314T	STATOR
19	804313T	ARMATURE
20	881369T1	HOLDER ASSEMBLY, Brush
21	804316	BRUSH SET
22	24-804317	SPRING
23	881370T	BRACKET
24	10-804337	SCREW, (M4 x 16)
25	10-804335	THRU BOLT, (M6 x 120)
26	10-804605	BOLT, (M8 x 45)
27	881373001	TERMINAL
28	13-881377	LOCKWASHER
29	11-82382M	NUT
30	11-881372	NUT
31	881374	COVER

▶Steering Handle (37 parts)

Ref	OEM Part #	Part Name
-	816366A56	STEERING HANDLE KIT Comment: SN# 1B227000 & Up
1	12020A3	HANDLE ASSEMBLY, Steering Arm
2	23-42992T02	BUSHING
3	22-8M0169589	FITTING, Grease
4	48414	HOUSING
5	48519	PLATE
6	27-48518	GASKET
7	10-878609	SCREW, (#10-16 x .600)
8	54-889729	CLAMP
9	10-40007112	SCREW, (M5 x 40)
10	10-32,11-816874	WING NUT,
11	87-823609A15	SWITCH KIT, Stop - Throttle Handle
12	87-8M0104612	SWITCH ASSEMBLY, Stop
13	54-648551	CLAMP
14	NSS	NOT SOLD SEPARATE, Insulator
15	NSS	NOT SOLD SEPARATE, Decal-Throttle
16	10-62568	SCREW, (#10-16 x .375)
17	8M0221732	GRIP
18	54-648552	CLIP
19	8885241	CONDUIT, (9.03 Inches)
20	89566006	GUIDE, Tube
21	89578	BARREL
22	10-32,10-824081	SET SCREW,
23	12019004	CABLE ASSEMBLY
24	8M0204660	GUIDE
25	20007	ANCHOR
26	8-32,10-8M0204644	SET SCREW,
27	10-823567105	SCREW, (M10 x 105) Hex Flange - Stainless Steel
28	48416	CAP
29	12-4002319	WASHER
30	12-12024	WASHER, (.402 x .787 x .039 Bellevi)
31	23-146011	SPACER
32	12018A4	TUBE ASSEMBLY, Throttle
33	NSS	NOT SOLD SEPARATE, Roll Pin
34	NSS	NOT SOLD SEPARATE, Drive Wheel
35	54-816311T	TIE STRAP, (8.00 Inches)
36	11-40140	NUT, (M10)

▶Steering Handle Kit Components (51 parts)

Ref	OEM Part #	Part Name
-	8949112	KEY, Ignition (2F)
1	816366T10	HANDLE, Bracket
2	10-881261	SCREW, (.313-24 x 3.50)
3	14-42981	TAB WASHER
4	822263	SPACER
5	84-12649T08	HARNESS ASSEMBLY Comment: SN# 1B227000 & Up
6	84-12649A4	HARNESS ASSEMBLY Comment: SN# 1B226999 & Below
7	87-88107A5	SWITCH KIT, Key
8	11-879755	NUT, Special - Black Nylon
9	121051	GROMMET
10	19-889730	PLUG
11	8M0032846	RETAINER, Brass
12	8158041	COVER
13	10-878608	SCREW, (#10-16 x .500)
14	87-11083A4	SWITCH ASSEMBLY, Stop
15	15920Q54	LANYARD ASSEMBLY
16	84-11149A3	CABLE ASSEMBLY
17	889528T01	HORN ASSEMBLY
18	87-18286A19	SWITCH KIT, Trim (25.00 Feet)
19	87-8M0052927	SWITCH
20	10-12110	SCREW, (#6-32 x .750)
21	54-648551	CLAMP
22	10-878608	SCREW, (#10-16 x .500)
23	10-849838	SCREW, (.375-24 x 1.250)
24	11-8M0204726	NUT, (.375-24) Stainless Steel
25	48419T01	ROD END
26	495637	ROD, Shift
27	23-26856	BUSHING
28	12-35950	WASHER, (.273 x .437 x .031) Stainless Steel
29	18-25191	COTTER PIN
30	8163677	LEVER, Shift
31	16-8M0034452	STUD, (.375-24 x 1.125)
32	98530	KNOB
33	12016A2	DETENT/SPRING KIT
34	23-8159831	BUSHING
35	12-823970	WASHER
36	12-824610	WASHER, Plastic
37	12-814803	WASHER
38	14-8158051	TAB WASHER
39	10-4000357	SCREW, (M8 x 45)
40	56-52148A08	CO PILOT ASSEMBLY
41	52148002	PILOT ROD, (15.00 Inches)
42	11-52155A1	NUT ASSEMBLY
43	10-36137	SCREW, (.250-28 x 1.00)
44	821621	KNOB, Prong
45	873491	ROD
46	23-26841	BUSHING
47	12-8M0042642	WASHER, (.323 x .563 x .063) Stainless Steel
48	11-826709111	NUT, (.312-24) Stainless Steel
49	11-64015	NUT, (.250-20)
50	13541	PLUG, Male

▶Swivel Bracket and Steering Arm (18 parts)

Ref	OEM Part #	Part Name
1	1400-8M0220957	SWIVEL BRACKET
2	26-87735	SEAL, Oil (Lower)
3	23-818764	BUSHING
4	25-8M0214926	O-RING
5	23-816039	SPACER
6	22-8M0169589	FITTING, Grease
7	23-821207	BUSHING
8	10-64014	SCREW, (.250-28 x .500)
9	99661A35	SWIVEL PIN ASSEMBLY
10	92876A12	LINK ROD ASSEMBLY
11	10-849838	SCREW, (.375-24 x 1.250)
12	11-8M0204726	NUT, (.375-24) Stainless Steel
13	12-37828	WASHER, (.390 x .625 x .062) Stainless Steel
14	42961A06	YOKE ASSEMBLY, Bottom
15	53-67684	RING, Retaining
16	12-816432	THRUST WASHER (Also included with Reference #1)
17	NSS	NOT SOLD SEPARATE, Decal-Serial Overlaminate
18	11288001	BUMPER, Bottom Yoke (X-Long)

▶Throttle Lever and Linkage (15 parts)

Ref	OEM Part #	Part Name
1	896936	LEVER, Throttle Control
2	18-892655T	HAIR PIN
3	24-897535005	SPRING, Throttle Cam Return
4	12-94524M	WASHER
5	10-881375	BOLT, (M6 x 30)
6	23-881378	COLLAR
7	13-81868M	WAVE WASHER
8	12-84974M	WASHER
9	896937	LEVER, Throttle Actuator
10	23-8813321	BUSHING
11	10-8248326	SCREW, (M6 x 25 MM)
12	23-804344002	COLLAR
13	97742001	LINK, Joint
14	11-82388M	NUT, (M5)
15	84100M	RETAINER

▶Tools (1 parts)

Ref	OEM Part #	Part Name
0	91-8M0075272	TOOL, Fuel Pressure Gauge Adapter

▶Top Cowl (27 parts)

Ref	OEM Part #	Part Name
-	37-898134A06	DECAL SET Comment: (Mariner 100 EU)
1	4021-896920T18	TOP COWL ASSEMBLY Comment: (Mariner) SN# 1B227000 & Up
2	821256T2	INLET, Air - Silver Comment: (Mariner)
3	10-82130016	SCREW, (M6 x 16)
4	859356A02	SOUND BLANKET KIT Comment: SN# 1B227000 & Up
5	NSS	NOT SOLD SEPARATE, Sound Blanket-Port
6	NSS	NOT SOLD SEPARATE, Sound Blanket-Starboard
7	NSS	NOT SOLD SEPARATE, Sound Blanket-Back
8	19-823865	CAP PLUG
9	831207A16	HANDLE
10	23-812707	BUSHING
11	23-831214	SPACER
12	13-12134	WASHER, Wave
13	8M0001081	CAM
14	12-8M0214930	WASHER
15	10-1993716	SCREW, (M6 x 16)
16	8M0036792	BRACKET, Front
17	815477	BUMPER, Latch
18	12-8M0204649	WASHER, (.281 x .500 x .060) Stainless Steel
19	11-401366	NUT, (M6) Stainless Steel
20	53-8237951	RING, Retaining
21	8M0207770	ROLLER
22	8155381	PIN, Roll
23	12-8M0204649	WASHER, (.281 x .500 x .060) Stainless Steel
24	11-401366	NUT, (M6) Stainless Steel
25	47341A11	ROPE AND HANDLE KIT, Manual Starting
26	50-12066Q10	ROPE, Starter Comment: (Mercury Branded)

▶Transom Bracket (29 parts)

Ref	OEM Part #	Part Name
1	3426-828334T02	BRACKET, Transom (Starboard)
2	3425-828333T07	BRACKET ASSEMBLY, Transom (Port)
3	22-8M0169588	FITTING, Grease (Port)
4	826125A1	TILT TUBE Comment: (Stainless Steel)
5	11-826135	NUT, (1.00-14) Nylon Insert Comment: (Use With Stainless Steel Tilt Tube)
6	25-45711	O-RING, (.612 x .103)
7	13-88750	WASHER
8	11-826164	NUT, (.875-14) Comment: (Use With Stainless Steel Tilt Tube)
9	10-8M0149747	SCREW, (.500-20 x 4.500)
10	12-8M0204665	WASHER, (.530 x .870 x .105) Stainless Steel
11	12-8M0204648	WASHER, (1.5 x 3.05 x 0.13) Stainless Steel
12	11-82671117	NUT, (.500-20)
13	24-830899	SPRING, Tension
14	8M0109798	LEVER ASSEMBLY, Tilt Lock
15	23-65830	NYLINER
16	24-830900	SPRING, Compression
17	99633	KNOB
18	17-99615	PIN, Groove
19	17-893709	PIN (Also included with Reference #2)
20	8M0086406	BRACKET, Anchor
21	10-858771	SCREW, (M10 x 30)
22	12-4002319	WASHER
23	11-40114	NUT, (M10 x 1.5)
24	97-818298Q1	ANODE KIT
25	10-8M0204707	SCREW, (M6 x 25)
26	12-8M0204649	WASHER, (.281 x .500 x .060) Stainless Steel
27	54-22740	CLIP
28	8M0084613	C WASHER
29	10-878609	SCREW, (#10-16 x .600)

▶Vapor Separator (26 parts)

Ref	OEM Part #	Part Name
-	8M0120285	VAPOR SEPARATOR ASSEMBLY, Complete
1	881316001	COVER
2	880888T01	REGULATOR, Fuel Pressure
3	10-881326004	SCREW
4	19-823865001	PLUG, Cap
5	10-881326005	SCREW
6	881327002	PLATE, Baffle
7	10-881326003	SCREW
8	881327001	PLATE, Baffle
9	84-888237001	HARNESS ASSEMBLY, Wire
10	54-881530008	CLAMP
11	8M0095242	VALVE, Needle
12	881320001	FLOAT
13	17-881321001	PIN, Float
14	25-881322004	DAMPER
15	23-881332004	COLLAR
16	8M0065218	PUMP ASSEMBLY, Fuel
17	35-881323001	FILTER
18	54-881530006	CLAMP
19	25-881322003	DAMPER
20	27-881325001	GASKET
21	881319001	BODY ASSEMBLY
22	10-881326006	SCREW, Drain
23	25-881318001	O-RING
24	25-93101M	GROMMET
25	23-881332005	COLLAR

▶Vapor Separator Hose Routings (23 parts)

Ref	OEM Part #	Part Name
1	8M0120285	VAPOR SEPARATOR ASSEMBLY, Complete
2	32-804162015	TUBING
3	54-881530009	CLAMP
4	22-881558002	FITTING, Straight
5	25-885183001	O-RING
6	32-804162020	TUBING Comment: SN# 1B227000 & Up
7	56762	TIE STRAP, (4.00 Inches)
8	22-881558003	FITTING, Tee
9	32-804162008	TUBING
10	32-804162016	TUBING
11	32-804162021	TUBING Comment: SN# 1B227000 & Up
12	32-804162010	TUBING
13	888259001	COOLER
14	10-881326007	SCREW
15	32-804162022	TUBING Comment: SN# 1B227000 & Up
16	32-804162012	TUBING
17	32-804162009	TUBING
18	32-804162013	TUBING
19	54-881530010	CLAMP
20	32-804162014	TUBING
21	54-881530011	CLAMP
22	35-892758001	STRAINER
23	32-804162017	TUBING

100-Hour / Annual Service Checklist

Regular maintenance keeps your Mercury 75 EFI (4-STROKE) 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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