Mercury 1250BP (2641855 THRU 3253111) Parts & Diagrams

🔎 Mercury 1250BP Reference Library — Exploded parts diagrams (18 diagrams), specifications, common issues, and maintenance checklist.

The Mercury 1250BP is a 2-Stroke DFI, Inline 3-Cylinder outboard motor. Powers center-console boats, larger pontoons, and offshore-capable fishing craft.

Quick Reference Specifications

Specification	Value
Engine Type	2-Stroke DFI, Inline 3-Cylinder
Horsepower	125 HP
Displacement	1526 cc (1.5L)
Bore x Stroke	92 mm x 76 mm
Spark Plug (Type & Gap)	NGK IZFR5J
Engine Oil Capacity	—
Recommended Engine Oil	Mercury OptiMax/DFI Oil
Gear Case Oil Capacity	828 mL (28 oz)
Idle Speed (in gear)	650–700 RPM (in gear)
Full Throttle RPM Range	5000-5750
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 1250BP:

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 1250BP.

▶BOTTOM COWL AND SHIFT LINKAGE (47 parts)

Ref	OEM Part #	Part Name
1	2115-3807	COWL, BOTTOM (MERC 1250BP)
2	52862A2	DRIP TRAY ASSEMBLY, BOTTOM COWL
3	37940	PAD, SOUND - DRIP TRAY
4	10-41228	SCREW, DRIP TRAY TO BOTTOM COWL (1/2")
5	32-8M0108355	HOSE, DRIP TRAY TO BOTTOM COWL (8")
6	37638	BOOT, CONTROL CABLES - BOTTOM COWL
7	76369	SPACER, BOTTOM COWL (COWL FRONT COVER)
8	10-48591	SCREW, SPACER TO BOTTOM COWL (1/2")
9	37637	BOOT, FUEL CONNECTOR - BOTTOM COWL
10	23760	BAFFLE, BOTTOM COWL
11	10-52867	SCREW, BAFFLE TO BOTTOM COWL
12	37445	SUPPORT, WIRING HARNESS - BOTTOM COWL
13	10-69029	SCREW, WIRING HARNESS SUPPORT TO BOTTOM COWL (1 3/4")
14	11-8M0207775	NUT, WIRING HARNESS SUPPORT SCREW
15	32-8M0108355	HOSE, TELL TALE - EXHAUST COVER TO BOTTOM COWL (16")
16	52889	NOZZLE, TELL TALE HOSE TO BOTTOM COWL
17	10-41228	SCREW, TELL TALE NOZZLE TO BOTTOM COWL (1/2")
18	22-996642	ELBOW, TELL TALE HOSE TO EXHAUST COVER
19	54-48123	CLAMP, TELL TALE HOSE TO CONNECTOR AND ELBOW
20	10-28713	GASKET, POWERHEAD TO DRIVE SHAFT HOUSING
21	26-38970	SEAL, RUBBER - WATER INLET TUBE
22	38448	RETAINER, WATER TUBE SEAL
23	10-69069	SCREW, RETAINER TO DRIVE SHAFT HOUSING (3/4")
24	37918	SEAL, COWL - FRONT
25	99358	STRIP, RETAINING - COWL SEAL
26	10-37571	SCREW, SEAL AND RETAINING STRIP TO COWL
27	53777A2	SHIFT SHAFT ASSEMBLY, UPPER (LONG SHAFT)
28	48047A2	LINK ROD ASSEMBLY
29	12-24664	WASHER, LINK ROD
30	13-29720	WASHER, WAVE - LINK ROD
31	52732A6	BRACKET ASSEMBLY, ANCHOR CONTROL CABLES
32	49935	CAP, BRASS BARREL TO THROTTLE CABLE
33	10-35386	SCREW, ANCHOR BRACKET TO CYLINDER BLOCK (1")
34	24-20099	SPRING, LINK ROD TO GUIDE BLOCK
35	37896	GUIDE BLOCK, LINK ROD
36	52100	WEAR PLATE, LINK ROD
37	8M0036768	LATCH, CONTROL CABLE FASTENING - ANCHOR BRACKET
38	12-69056	WASHER, PLAIN - LINK ROD
39	11-826709109	NUT, LINK ROD
40	49932A1	LEVER ASSEMBLY, CONTROL CABLE LOCKING - ANCHOR BRACKET
41	24-37911	SPRING, CONTROL CABLE LOCKING LEVER
42	17-239281	PIN, ROLL - CONTROL CABLE LOCKING LEVER
43	24-38472	SPRING, CONTROL CABLE TENSION - ANCHOR BRACKET
44	46933A1	GROUND STRAN ASSEMBLY CRANKCASE TO COWL (3 5/8")
45	46933A2	GROUND STRAP ASSEMBLY, DRIVE SHAFT HOUSING TO COWL (3 3/8")
46	10-62568	SCREW, GROUND STRAP FASTENING
47	13-69432	LOCKWASHER, GROUND STRAP SCREW

▶CARBURETOR ASSEMBLY (23 parts)

Ref	OEM Part #	Part Name
--	1399-3937	REPAIR PARTS KIT (1 PER CARBURETOR)
1	1354-3857	CARBURETOR ASSEMBLY, COMPLETE (KD-3A)
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	52194	LOCKWASHER, FLOAT BOWL COVER SCREW
14	1399-3938	SCREEN, FILTER
16	1399-4791A1	COVER, STRAINER
18	10-25822	SCREW, STRAINER COVER FASTENING
19	1395-6027	SCREW, THROTTLE STOP LEVER
20	8146791	LEVER, THROTTLE STOP Comment: USED ON CENTER AND LOWER CARBURETOR ONLY--REPLACED WITH A-27977 CLUSTER ON UPPER CARBURETOR
21	1395-7942	SHAFT, THROTTLE
23	10-23178	SCREW, BODY (IDLE TUBE)
26	1395-9017	SHUTTER, THROTTLE
28	1399-3515	SCREW, IDLE ADJUSTMENT
29	10-28405	SCREW, PLUG - MAIN FUEL JET CHANNEL
31	1395-6207	JET, MAIN FUEL (.072)
33	1399-3522	SCREW, PLUG - MAIN NOZZLE
36	10-23030	SCREW, BODY CHANNEL
37	27-481641	GASKET, CARBURETOR FLANGE
38	11-29250	NUT, CARBURETOR MOUNTING STUD

▶CARBURETOR LINKAGE AND CHOKE SOLENOID (34 parts)

Ref	OEM Part #	Part Name
1	48187	CHOKE SOLENOID
2	13-26996	LOCKWASHER, SOLENOID TERMINAL
3	11-68219	NUT, SOLENOID TERMINAL
4	10-25299	SCREW, CHOKE SOLENOID (3/4")
5	13-8M0204647	LOCKWASHER, CHOKE SOLENOID SCREW
6	48315A2	PLUNGER AND LINK ASSEMBLY, CHOKE SOLENOID
7	52518	CLUSTER, THROTTLE LEVER (UPPER CARBURETOR)
8	1395-6027	SCREW, CLUSTER TO THROTTLE LEVER
9	1354-3857	CARBURETOR ASSEMBLY, COMPLETE (KD-3A)
10	53720A2	THROTTLE PICK-UP BRACKET ASSEMBLY
11	10-53651	SCREW,THROTTLE BRACKET MOUNTING (1/2")
12	59757	BRACKET, COIL LEAD RETAINER
13	10-64278	SCREW, COIL BRACKET (1")
14	12-8M0204649	WASHER, COIL BRACKET SCREW
15	11-8M0207775	NUT, COIL BRACKET SCREW
16	11-22496	KNOB, CHOKE ROD
17	25-20116	GROMMET, CHOKE ROD
18	49589	STRAP, CHOKE KNOB TO CHOKE ROD
19	10-48591	SCREW, STRAP TO CHOKE KNOB (1/2")
20	13-26996	LOCKWASHER, STRAP SCREW
21	48203	ROD, CHOKE
22	10-48591	SCREW, STRAP TO CHOKE ROD (1/2")
23	11-46438	NUT, STRAP TO CHOKE ROD SCREW
24	48152	SHUTTER, CHOKE - CARBURETOR
25	16-69037	STUD, CARBURETOR - CHOKE SHUTTER PIVOT
26	11-20110	NUT, CHOKE SHUTTER TO CARBURETOR STUD
27	35-57819A1	SCREEN, FILTER - CARBURETOR (MIDDLE AND TOP)
28	10-22523	SCREW, CARBURETOR FILTER SCREEN TO CARBURETOR (3/4")
29	11-20110	NUT, CARBURETOR FILTER SCREEN FASTENING SCREW
30	35-48406	SCREEN, FILTER -CARBURETOR (LOWER)
31	24-48230	SPRING, CHOKE ROD TENSION
32	10-657461	STUD, CHOKE ROD SPRING TO CARBURETOR
33	23-32427	SPACER, CHOKE ROD SPRING STUD
34	11-8M0207775	NUT, CHOKE ROD SPRING TO CARBURETOR STUD

▶CLAMP AND SWIVEL BRACKET ASSEMBLY (62 parts)

Ref	OEM Part #	Part Name
--	11-8M0207775	NUT, LOWER EYE BOLT MOUNTING PIN SCREW (LONG SHAFT)
1	1440-3296A1	CLAMP BRACKET ASSEMBLY
2	28403A3	THUMB SCREW ASSEMBLY
3	12-28404	WASHER, THUMB SCREW
4	38-56267	SERIAL PLATE
5	10-25612	SCREW, SERIAL PLATE TO SWIVEL BRACKET
6	17-53776A1	SWIVEL PIN AND STEERING ARM ASEEMBLY (LONG SHAFT)
7	26-52924	SEAL, RUBBER - SWIVEL PIN
8	10-49373	BOLT, STEERING ARM TO UPPER MOUNT
9	11-8M0204653	NUT, STEERING ARM BOLT
10	1464-3859A1	SWIVEL BRACKET ASSEMBLY (LONG SHAFT)
11	26-37448	OIL SEAL, SWIVEL BRACKET
12	23-54191	BUSHING SWIVEL BRACKET
13	10-47828	SCREW, DRIVE - SWIVEL BRACKET
14	22-69059	FITTING, GREASE - SWIVEL BRACKET
15	19-77633Q	LUBRICAP, SWIVEL BRACKET GREASE FITTING
16	8M0041936	TUBE, TILT - CLAMP BRACKET TO SWIVEL BRACKET
17	12-52864	WASHER, CLAMP BRACKET TILT TUBE
18	11-858869	NUT, TILT TUBE FASTENING
19	53078	CAP, PLASTIC - TILT TUBE
20	23-59624	SPACER, CLAMP BRACKET STUD
21	16-59625	STUD, CLAMP BRACKET
22	12-24812	WASHER, CLAMP BRACKET STUD
23	11-862902	NUT, CLAMP BRACKET STUD
24	10-49369	SCREW, TILT LOCK PIN (9 3/8")
25	12-37828	WASHER, TILT LOCK PIN SCREW
26	11-82671013	NUT, TILT LOCK PIN SCREW
27	10-68299	BOLT, CLAMP BRACKET TO BOAT TRANSOM
28	12-68300	WASHER, CLAMP BRACKET BOLT
29	11-82670912	NUT, CLAMP BRACKET BOLT
30	30126A1	TILT STOP LEVER ASSEMBLY (SHORT SHAFT)
31	10-30128	SCREW, TILT STOP LEVER TO CLAMP BRACKET (SHORT SHAFT)
32	13-31030	WASHER, WAVE - TILT STOP LEVER SCREW (SHORT SHAFT)
33	11-29250	NUT, TILT STOP LEVER SCREW (SHORT SHAFT)
34	76386	TILT LOCK ASSEMBLY, STARBOARD (LONG SHAFT)
35	76385T	TILT LOCK ASSEMBLY, PORT (LONG SHAFT)
36	47802	TUBE, TILT LOCK (LONG SHAFT)
37	18-47959	COTTER PIN, TILT LOCK TUBE (LONG SHAFT)
38	23-47803	BUSHING, TILT LOCK TUBE (LONG SHAFT)
39	13-69150	WASHER, WAVE - TILT LOCK TUBE (LONG SHAFT)
40	55-28414	PIN, LOWER EYE BOLT MOUNTING (LONG SHAFT)
41	12-37429	WASHER, SWIVEL PIN
42	12-48926	WASHER
43	48884	YOKE, BOTTOM
44	11-37424	NUT, SWIVEL PIN RETAINING
45	10-48924	SCREW, YOKE TO DRIVE SHAFT HOUSING - LOWER (3 1/2")
46	12-24501	WASHER, YOKE SCREW
47	11-35000	NUT, YOKE SCREW
48	49982A1	EYE BOLT ASSEMBLY
49	10-69375A1	SCREW, NYLOK - -LOWER EYE BOLT MOUNTING PIN (3/4")
50	12-8M0204648	WASHER, LOWER BUSHING RETAINER
51	23-28198	BUSHING, RUBBER - EYE BOLT
52	11-20739	NUT, EYE BOLT
53	12-52601	WASHER, PLAIN - EYEBOLT
54	27-49985	GASKEY, EYE BOLT (3/16" NEOPRENE)
55	12-49983	WASHER, CUPPED - EYE BOLT
56	27-49984	GASKET, EYE BOLT (1/2" NEOPRENE)
57	11-8M2014641	NUT, EYE BOLT
58	52131	ROD, STEERING
59	23-52169	SLEEVE, STEERING ROD
60	12-20086	WASHER, STEERING ROD
61	11-8M0204726	NUT, STEERING ROD

▶COWLING AND FRONT COVER (17 parts)

Ref	OEM Part #	Part Name
1	2183-7928A3	COWL FRONT COVER ASSEMBLY
2	37-64413	EMBLEM, FRONT COVER
3	56849	KNOB, COWL FRONT COVER FASTENING
4	12-30771	WASHER, COVER FASTENING KNOB (RUBBER)
5	12-26825	WASHER, COVER FASTENING KNOB (STEEL)
6	24-30772	SPRING, TENSION - FASTENING KNOB
7	17-29077	ROLL PIN, TENSION SPRING TO KNOB
8	31089	STRIP, SOUND ABSORBING
9	38675	BLANKET, SOUND ABSORBING
10	35769	SEAL, SOUND ABSORBING - UPPER
11	53334	SEAL, SOUND ABSORBING - TOP
12	2136-4660A17	WRAP AROUND COWL ASSEMBLY
13	54943	SCREEN, WRAP AROUND COWL - UPPER
14	54942	SCREEN, WRAP AROUND COWL - LOWER
15	17-54944	RIVET, SCREEN TO COWL
16	46785A1	COWL LATCH ASSEMBLY
17	30413	HOOK, COWL LATCH FASTENING

▶CRANKSHAFT, PISTONS AND CONNECTING RODS (31 parts)

Ref	OEM Part #	Part Name
--	39-49839A12	RING, PISTON (.015 OVERSIZE) - 1/16" THICK
1	436-3803A2	CRANKSHAFT ASSEMBLY (MERC 1250BP) - NOT AS SHOWN
2	11-52901	NUT, FLYWHEEL TO CRANKSHAFT
3	30-62567T	BEARING, BALL - UPPER
4	30-63742T	BEARING, BALL - LOWER
5	54196A6	CARRIER, "O" RING - CRANKSHAFT
6	25-35126	"O" RING, CARRIER
7	535-3190A2	CENTER MAIN BEARING ASSEMBLY
8	17-20032	DOWEL PIN, CENTER MAIN BEARING
9	29-714221	BEARING, NEEDLE - OUTER RACE
10	26113T	RACE, OUTER (PAIR)
11	53-26933	RING, SNAP - OUTER RACE
12	17-47246	DOWEL PIN, STEPPED
13	10-22968	SCREW, CENTER MAIN BEARING CLAMPING (1 1/4")
14	11-8M0207775	NUT, BEARING CLAMPING SCREW
15	540-7238A2	MAIN BEARING ASSEMBLY, VALVE TYPE
16	17-20032	DOWEL PIN, MAIN BEARING
17	10-45775	SCREW, MAIN BEARING CLAMPING (9/16")
18	11-45774	NUT, MAIN BEARING CLAMPING SCREW
19	34-56007A1	REED SET, MATCHED - MAIN BEARING
20	34-48081	REED STOP, MAIN BEARING REED VALVES
21	10-20597	SCREW, REED STOP MOUNTING (3/8")
22	774-9137A12	PISTON AND PISTON PIN ASSEMBLY (MERC 1250BP)
23	53-857196	LOCK RING, PISTON PIN
24	39-48834A12	RING, PISTON (1/16")
25	624-8101A3	CONNECTING ROD AND CAP ASSEMBLY (MERC 1250BP)
26	31-62596A1	BEARING ASSEMBLY, CRANKPIN (MERC 1250BP)
27	10-54803	SCREW, CONNECTING ROD
28	11-49091	NUT, CONNECTING ROD SCREW
29	29-8M0214934	BEARING, NEEDLE - PISTON PIN
30	12-8M0032839	WASHER, NEEDLE LOCATING

▶CYLINDER BLOCK AND CRANKCASE ASSEMBLY (56 parts)

Ref	OEM Part #	Part Name
--	12-26825	WASHER, CRANKCASE TO CYLINDER BLOCK SCREW
1	1134-3197A1	END CAP ASSEMBLY, UPPER
2	26-41953	OIL SEAL
3	25-47254	"O" RING
4	15-47248A1	SHIM, END CAP TO CRANKCASE (.002-3-5-10)
5	10-30225	SCREW, END CAP MOUNTING (1")
6	852-3884A6	CYLINDER BLOCK AND CRANKCASE ASSEMBLY (MERC 1250BP) Comment: NOT AS SHOWN
7	27-53862	GASKET, CRANKCASE TO CYLINDER BLOCK
8	16-64936	STUD,CARBURETOR MOUNTING (1 3/16")
9	16-64281	STUD, CRANKCASETO DRIVE SHAFT HOUSING (1 7/8")
10	17-43044	PIN, DOWEL - CRANKCASE TO CYLINDER BLOCK
11	17-20323	PIN, DOWEL - CYLINDER BLOCK TO MAIN BEARING
12	16-48770	STUD, CYLINDER BLOCK TO DRIVE SHAFT HOUSING (3 9/16")
13	16-52540	STUD, CYLINDER BLOCK TO DRIVE SHAFT HOUSING (2")
14	10-26132	SCREW, CRANKCASE TO CYLINDER BLOCK (2 1/2")
15	10-69091	SCREW, CRANKCASE TO CYLINDER BLOCK ( 1 5/8")
16	11-29250	NUT, CRANKCASE FASTENING SCREW
17	10-20359	SCREW, CENTER MAIN BEARING LOCKING
18	14-20091	TAB WAHER, BEARING LOCKING SCREW
19	1126-3544A3	END CAP ASSEMBLY, LOWER
20	21-28481A1	CHECK VALVE ASSEMBLY, END CAP
21	26-41953	OIL SEAL, UPPER
22	25-20081	"O"RING
23	15-20085A1	SHIM, END CAP TO CRANKCASE (.002-3-5-10)
24	10-30225	SCREW, END CAP MOUNTING (1")
25	66696A1	COVER, WATER JACKET - CYLINDER BLOCK Comment: PART OF CYLINDER BLOCK AND CRANKCASE ASSEMBLIES
26	27-47228	GASKET, WATER JACKET COVER Comment: PART OF CYLINDER BLOCK AND CRANKCASE ASSEMBLIES
27	10-53167T	SCREW, WATER JACKET COVER TO CYLINDER BLOCK (7/8") Comment: PART OF CYLINDER BLOCK AND CRANKCASE ASSEMBLIES
28	13-53166	LOCKWASHER, WATER JACKET COVER FASTENING SCREW Comment: PART OF CYLINDER BLOCK AND CRANKCASE ASSEMBLIES
29	27-55283	GASKET, CYLINDER BLOCK TO BAFFLE PLATE
30	62277A1	PLATE, BAFFLE - EXHAUST MANIFOLD
31	27-55284	GASKET, BAFFLE PLATE TO EXHAUST MANIFOLD COVER
32	55281T	COVER, EXHAUST MANIFOLD
33	10-38837	SCREW, MANIFOLD COVER MOUNTING (1 1/8")
34	1023-3755A1	COVER, CYLINDER BLOCK
35	27-981853	GASKET, CYLINDER BLOCK COVER
36	10-21091	SCREW, CYLINDER BLOCK COVER MOUNTING (1 1/8")
37	11-8M0207775	NUT, COVER MOUNTING SCREW
38	22-328022	PLUG, PIPE - CYLINDER BLOCK COVER
39	37440	BRACKET, MOUNT SUPPORT - CYLINDER BLOCK
40	10-35386	SCREW, BRACKET TO CYLINDER BLOCK (1")
41	54804	COVER, TRANSFER PORT
42	27-52891	GASKET, TRANSFER PORT COVER
43	10-8M0214943	SCREW, TRANSFER PORT COVER MOUNTING (1")
44	22-67902	CONNECTOR, CYLINDER BLEED HOSE - UPPER
45	32-9912688	HOSE, UPPER CYLINDER BLEED (9 1/2")
46	22-62365A1	CHECK VALVE ASSEMBLY BLEED HOSE
47	21-28481A1	CHECK VALVE ASSEMBLY
48	54-20387	CLAMP, BLEED HOSE TO CONNECTOR
49	22-20781	ELBOW, BALANCE TUBE TO MAIN BEARING SCREW
50	32-9912688	HOSE, CENTER CYLINDER BLEED (7 1/2")
51	22-432881	TEE, BLEED HOSE TO CYLINDER BLOCK - CENTER
52	22-53491	TEE, BLEED HOSE TO CYLINDER BLOCK - LOWER
53	54-20386	CLAMP, BALANCE TUBE TO ELBOW AND TEE
54	32-8M0108355	TUBE, BALANCE - MAIN BEARING
55	32-9912688	HOSE, CYLINDER BLEED - LOWER (8 1/2")

▶DISTRIBUTOR ADAPTOR AND VERTICAL LINKAGE (57 parts)

Ref	OEM Part #	Part Name
1	393-3736A79	HOUSING ASSEMBLY, DISTRIBUTOR
2	32197	STOP, SPARK ADVANCE - DISTRIBUTOR HOUSING
3	17-27962	PIN, ANCHOR SPRING - DISTRIBUTOR HOUSING
4	24-27944	SPRING, HORSESHOE - DISTRIBUTOR HOUSING
5	12-53540	WASHER, ECONOMIZER COLLAR - DISTRIBUTOR HOUSING
6	55804A1	ECONOMIZER COLLAR ASSEMBLY
7	17-27961	PIN, ECONOMIZER COLLAR - SPRING RETAINER
8	22-25094	FITTING , GREASE - ECONOMIZER COLLAR
9	27947	SWIVEL, LINKAGE - ECONOMIZER COLLAR
10	25996A1	SWIVEL AND LINK ROD ASSEMBLY
11	11-25168	NUT, UPPER LINK ROD ADJUSTING
12	37588	ROD, LINK - UPPER
13	27948	SWIVEL, UPPER LINK ROD TO THROTTLE CONTROL LEVER
14	48856	LEVER, THROTTLE CONTROL
15	13-25806	WASHER, WAVE -THROTTLE CONTROL LEVER SWIVEL
16	12-8M0204649	WASHER THROTTLE CONTROL LEVER SWIVEL
17	11-8267089	NUT, UPPER LINK ROD TO THROTTLE CONTROL LEVER
18	10-31830	SCREW, THROTTLE LEVER TO EXHAUST COVER (1 3/4")
19	12-8M0042641	WASHER, THROTTLE CONTROL LEVER SCREW
20	23-45818	BUSHING, THROTTLE CONTROL LEVER SCREW
21	11-8M0204726	NUT, THROTTLE CONTROL LEVER SCREW
22	37587	SWIVEL, LOWER - THROTTLE CONTROL LEVER TO THROTTLE CABLE
23	11-8267089	NUT, THROTTLE CABLE TO LOWER SWIVEL
24	48692	COLLAR, THROTTLE ACTUATOR
25	10-48675	SCREW, ADJUSTING - THROTTLE ACTUATOR COLLAR (1 1/2")
26	11-20890	NUT, THROTTLE ACTUATOR COLLAR ADJUSTING SCREW
27	52023	CAP, NYLON - THROTTLE ACTUATOR COLLAR ADJUSTING SCREW
28	48671	PLATE, THROTTLE ACTUATOR
29	10-37892	SCREW, THROTTLE ACTUATOR PLATE TO ECONOMIZER COLLAR (1")
30	12-847883	WASHER, THROTTLE ACTUATOR PLATE FASTENING SCREW
31	13-26996	LOCKWASHER, THROTTLE ACTUATOR PLATE FASTENING SCREW
32	23-48674	SPACER, THROTTLE ACTUATOR PLATE SCREW
33	54239	CAM, THROTTLE ACTUATOR PLATE
34	12-46246	WASHER, ADAPTOR - DISTRIBUTOR HOUSING
35	66165A2	ADAPTOR ASSEMBLY, DISTRIBUTOR
36	22-25094	FITTING, GREASE - DISTRIBUTOR ADAPTOR
37	10-78841	SCREW, DISTRIBUTOR HOUSING TO CRANKCASE (1 1/2")
38	12-20084	WASHER, DISTRIBUTOR HOUSING SCREW
39	11-22053	NUT, DISTRIBUTOR HOUSING SCREW
40	55805	BRACKET, STOP
41	16-20956	STUD, DISTRIBUTOR ADAPTOR TO STOP BRACKET
42	12-24662	WASHER, STOP BRACKET FASTENING STUD
43	11-826709109	NUT, STOP BRACKET FASTENING STUD
44	10-24228	SCREW, STOP BRACKET ADJUSTING (1 7/8")
45	11-20890	NUT, STOP BRACKET ADJUSTING SCREW
46	52023	CAP, NYLON - STOP BRACKET ADJUSTING SCREW
47	12-27939	WASHER, DISTRIBUTOR HOUSING
48	14-27960	TAB WASHER, ADAPTOR CAP FASTENING
49	13-27959	WASHER, WAVE - DISTRIBUTOR BALL BEARING TENSION
50	54567	CAP, DISTRIBUTOR HOUSING
51	23-47250	SPACER, DRIVE PULLEY
52	29906A1	DRIVEN PULLEY ASSEMBLY
53	17-29908	PIN, ROLL - FLANGE LOCATING
54	29907	FLANGE, DRIVEN PULLEY
55	28-29910	KEY, DISTRIBUTOR DRIVER
56	10-64652	SCREW, PULLEY CLAMPING SCREW
57	20140	BELT, TIMING

▶DISTRIBUTOR HOUSING AND ROTOR (39 parts)

Ref	OEM Part #	Part Name
--	8M0084600	CONNECTOR, SPARK PLUG LEAD
1	30-20066	BALL BEARING, DISTRIBUTOR HOUSING (UPPER)
2	11-54209	NUT, ROTOR SHAFT TO DISTRIBUTOR HOUSING
3	23-53539	SLEEVE, ROTOR SHAFT
4	393-3736A79	HOUSING ASSEMBLY, DISTRIBUTOR
5	53417	GROUND STRAP ASSEMBLY, DISTRIBUTOR TO CRANKCASE
6	10-62568	SCREW, GROUND STRAP ATTACHING (3/8")
7	22-55262	ELBOW, VENT - DISTRIBUTOR HOUSING
8	30-26379	BALL BEARING, DISTRIBUTOR HOUSING (LOWER)
9	23-53538	SPACER, ROTOR SHAFT
10	53-26406	RING, RETAINING - HALL BEARING TO DISTRIBUTOR HOUSING
11	393-4248	DISC, ROTOR
12	393-4371	ROTOR, DISTRIBUTOR
13	54-59588	CLAMP, DISTRIBUTOR CAP TO DISTRIBUTOR HOUSING
14	10-55943	SCREW, DISTRIBUTOR CAP CLAMP (1 1/4")
15	11-26768	NUT, DISTRIBUTOR CAP CLAMP SCREW
16	32-8M0108355	HOSE, VENT - DISTRIBUTOR TO ELBOW (13 1/2")
17	22-31521	ELBOW, VENT HOSE TO BOTTOM COWL
18	84-821945A5	HIGH TENSION CABLE ASSEMBLY, DISTRIBUTOR CAP TO COIL
19	25-26547	GROMMET, HIGH TENSION CABLE
20	332-2854T01	BOOT, HIGH TENSION CABLE TO COIL
21	85-94589	SLEEVE, HIGH TENSION CABLE
22	393-4841A2	DISTRIBUTOR CAP ASSEMBLY Comment: A-27-55896 GASKET, DISTRIBUTOR CAP
23	22-31521	ELBOW, VENT - DISTRIBUTOR CAP
24	33-896329827	SPARK PLUG (CHAMPION - L19V)
25	84-813715A1	SPARK PLUG LEAD ASSEMBLY #1,#2,#3,#4,#5 AND #6
26	85-63709A1	PROTECTOR, SPARK PLUG LEAD
27	85-94589	SLEEVE, SPARK PLUG LEAD TO DISTRIBUTOR
28	25-26547	GROMMET, SPARK PLUG LEADS
29	45409	WIRE RETAINER, HIGH TENSION LEADS
30	45392	BRACKET, FRONT - WIRE RETAINER
31	47398	BRACKET, REAR - WIRE RETAINER
32	10-62568	SCREW, FRONT AND REAR BRACKET ATTACHING
33	45391	SPACER, RUBBER - HIGH TENSION LEADS
34	332-4895A5	IGNITION COIL ASSEMBLY, COMPLETE
35	10-69026	SCREW, COIL MOUNTING BRACKET (7/8")
36	13-26992	LOCKWASHER, COIL MOUNTING BRACKET
37	10-37561	SCREW, COIL MOUNTING BRACKET (2 1/2")
38	11-8M0207775	NUT, COIL MOUNTING BRACKET SCREW

▶DRIVE SHAFT HOUSING ASSEMBLY (18 parts)

Ref	OEM Part #	Part Name
1	1570-3757	DRIVE SHATF HOUSING (LONG SHAFT)
2	12-45176	WASHER, SPACER STUD
3	11-8M0204653	NUT, SPACER STUD
4	53806	PLATE, HEAT SHIELD (LONG SHAFT)
5	48921A1	SHIFT DETENT ASSEMBLY
6	10-21091	SCREW, SHIFT DETENT TO DRIVE SHAFT HOUSING (1 1/8")
7	11-8267089	NUT, SHIFT DETENT SCREW
8	12-20086	WASHER, POWERHEAD STUDS
9	11-23161	NUT, POWERHEAD STUDS (3/8-24)
10	11-82670911	NUT, POWERHEAD STUDS ( 5/16-24)
11	32-53775	TUBE, WATER INLET (LONG SHAFT)
12	37417	COVER, TRIM - DRIVE SHAFT HOUSING
13	34571	SCREW, TRIM COVER TO BOTTOM COWL (1/2")
14	37919	SEAL, TRIM COVER TO DRIVE SHAFT HOUSING
15	37665	STRIP RETAINING - TRIM COVER SEAL (SIDE)
16	10-48409	SCREW, RETAINING STRIP TO DRIVE HOUSING ( 5/8")
17	38052	STRIP, RETAINING - TRIM COVER SEAL (REAR)
18	10-48408	SCREW, RETAINING STRIP TO DRIVE SHAFT HOUSING (1/2")

▶FLYWHEEL ASSEMBLY AND STATOR (16 parts)

Ref	OEM Part #	Part Name
1	19-45907	PLUG, FLYWHEEL PULLER THREADS
2	11-52901	NUT, FLYWHEEL Comment: PART OF A-436-3760A2 AND A-435-3803A2 CRANKSHAFT ASS'Y
3	12-33001	WASHER, FLYWHEEL NUT
4	225-2494A37	FLYWHEEL ASSEMBLY, COMPLETE
5	10-32417	SCREW, FLEXIBLE PLATE TO FLYWHEEL (5/8")
6	10-68997	SCREW, PLATE AND HUB TO FLEXIBLE PLATE (3/4")
7	17-26618	PIN, DOWEL - PULLEY TO FLYWHEEL
8	29788	FLANGE, FLYWHEEL PULLEY
9	30306	PULLEY, FLYWHEEL
10	29787	HUB, FLYWHEEL PULLEY
11	398-3633	STATOR ALTERNATOR
12	30050	TERMINAL, STATOR LEAD WIRE
13	10-57021	SCREW, STATOR TO UPPER END CAN (7/8")
14	54-26550	CLIP, STATOR/WIRING HARNESS LEADS FASTENING (5/16")
15	10-62568	SCREW, STATOR LEAD CLIP FASTENING
16	8M0084613	"D" WASHER, CLIP FASTENING SCREW

▶FUEL PUMP AND FUEL LINE ASSEMBLY (34 parts)

Ref	OEM Part #	Part Name
1	26083	COVER, FUEL PUMP MOUNT
2	10-28711	SCREW,COVER ATTACHING
3	53123A4	FUEL PUMP ASSEMBLY - UPPER
4	21-30430A1	CHECK VALVE ASSEMBLY
5	23014A1	DIAPHRAGM KIT
9	23004	RETAINER, CHECK VALVE
10	10-43725	SCREW, RETAINER TO HOUSING
11	54817A3	FUEL PUMP ASSEMBLY - LOWER
12	10-73013	SCREW, FUEL PUMP MOUNTING (1 1/2")
13	10-30273	SCREW, FUEL PUMP MOUNTING (1 7/8")
14	32-32256A1	FUEL LINE ASSEMBLY, PUMP TO CARBURETOR (9 7/8")
15	22-30174	ELBOW, UPPER CARBURETOR STRAINER COVER (90)
16	22-30175	SLEEVE, CARBURETOR STRAINER COVER ELBOW
17	22-30177	NUT, UPPER CARBURETOR STRAINER COVER ELBOW
18	54-22627	CLIP, FUEL LINE TO CYLINDER BLOCK
19	10-62568	SCREW, FUEL LINE CLIP TO CYLINDER BLOCK (3/8")
20	8M0084613	"D" WASHER, FUEL LINE CLIP SCREW
21	22-328022	PLUG, PIPE - FUEL PUMP
22	32-54739A1	FUEL LINE ASSEMBLY, PUMP TO CARBURETOR
23	32-52943A1	FUEL LINE ASSEMBLY, PUMP TO PUMB (14")
24	22-54818	"Y" FITTING, UPPER FUEL PUMP
25	22-30468	CONNECTOR, "Y" FITTING
26	22-30175	SLEEVE, "Y" FITTING CONNECTOR
27	22-30177	NUT, "Y" FITTING CONNECTOR
28	32-30176	FUEL LINE, ADAPTOR TO LOWER FUEL PUMP (18")
29	30186	ADAPTOR, CHECK UNIT (FUEL LINE)
30	30187	STEM, CHECK UNIT ADAPTOR
31	25-16524	"O" RING, ADAPTOR STEM
32	24-30189	SPRING, ADAPTOR STEM
33	30188	CUP WASHER, ADAPTOR
34	10-37561	SCREW, ADAPTOR TO BOTTOM COWL (2 1/2")
35	11-8M0207775	NUT, ADAPTOR FASTENING SCREW
36	32-31584A1	FUEL LINE ASSEMBLY, CARBURETOR TO CARBURETOR
37	29086	ELBOW, FUEL LINE TO CARBURETOR (45)

▶GEAR HOUSING ASSEMBLY, COMPLETE (PAGE 1) (57 parts)

Ref	OEM Part #	Part Name
-	1638-4108A4	GEAR HOUSING ASSEMBLY, COMPLETE Comment: LEFT HAND ROTATION-MERC 1250BP NOTE: GEAR HOUSING ASSEMBLIES, COMPLETE, INCLUDE ALL PARTS FROM REFERENCE #4 THRU REFERENCE #127 AS LISTED ON G4 AND G6
1	45-56346	DRIVE SHAFT (LONG SHAFT)
2	54196A6	CARRIER, "O" RING-DRIVE SHAFT COUPLING
3	25-35126	"O" RING, DRIVE SHAFT COUPLING
4	53864A1	SPACER ASSEMBLY, COMPLETE
5	16-25385	STUD, SPACER TO FACE PLATE (1 1/8")
6	26-24590	OIL SEAL, SHIFT SHAFT-SPACER (1 3/4" O.D.)
7	26-892361	OIL SEAL, SHIFT SHAFT-SPACER (1 9/16" O.D.)
8	12-31266	WASHER, RUBBER-SHIFT SHAFT
9	17-35973	PIN, DOWEL-SPACER TO WATER PUMP
10	16-30717	STUD, SPACER TO WATER PUMP (2 7/16")
11	26-56788	OIL SEAL, SPACER-LOWER
13	22-390721	PLUG, PIPE-SPACER
14	16-8M0034453	STUD, SPACER TO DRIVE SHAFT HOUSING (2 3/16")
16	23-56358	SPACER, DRIVEN GEAR
17	15-26320A1	SHIM ASSEMBLY, DRIVEN GEAR
18	53276	CAM, SHIFT
19	12-55154A1	WASHER ASSEMBLY, SHIFT CAM
20	24-53277	SPRING, SHIFT CAM
21	48909	COVER, SHIFT PIVOT
22	24-55089	SPRING, SHIFT FORK
23	10-55090	SCREW, SHIFT FORK
24	11-826709109	NUT, SHIFT FORK SCREW
25	10-53099	SCREW, PIVOT COVER TO GEAR HOUSING
26	13-26992	LOCKWASHER, SHIFT PIVOT COVER SCREW
27	48908	SHIFT FORK, SLIDING CLUTCH
28	48922	COLLAR, SHIFT-RATCHET
29	52-48906	RATCHET, SLIDING CLUTCH
30	43-48895A1	GEAR ASSEMBLY, DRIVE (2:1 GEAR RATIO)
31	31-21700	ROLLER BEARING, DRIVE GEAR
32	30-48916	BALL BEARING, DRIVE GEAR
33	15-34810A1	SHIM ASSEMBLY, DRIVE GEAR BEARING TO SPACER
34	48919	RETAINER, DRIVE SHAFT BEARING
35	10-28667	SCREW, RETAINER TO SPACER (1 1/8")
36	13-21272	LOCKWASHER, RETAINER SCREW
37	52172	MAGNET, RETAINER SCREW
38	23-48927	SPACER, DRIVEN GEAR
39	31-48941A1	ROLLER BEARING ASSEMBLY, TAPERED-DRIVEN GEAR
40	31-48913	BEARING, THRUST-DRIVE SHAFT
41	45-48877	DRIVE SHAFT, INPUT
42	12-48912	WASHER, THRUST-DRIVE SHAFT
43	15-53325A1	SHIM ASSEMBLY, DRIVE GEAR BEARING TO SPACER
44	25-48910	"O" RING, ADAPTOR FLANGE
45	25-8M0204645	"O" RING, WATER INLET TUBE
46	53869	COVER, SPACER-FRONT
47	27-48892	GASKET, SPACER TO FACE PLATE
48	48893	PLATE, FACE-SPACER TO WATER PUMP
49	47-89984T4	IMPELLER, WATER PUMP
50	17-8M0214994	PIN, IMPELLER DRIVING
51	27-48923	GASKET, FACE PLATE TO WATER PUMP
52	46-48881A1	WATER PUMP ASSEMBLY
53	30915	INSERT, WATER PUMP
54	26-16977	OIL SEAL, WATER PUMP
55	26-38970	SEAL, WATER PUMP INLET
56	23-29804T	SLEEVE, WATER TUBE GUIDE
57	11-8267089	NUT, WATER PUMP AND FACE PLATE STUDS
58	25-8M0214918	SLINGER, WATER PUMP-DRIVE SHAFT

▶GEAR HOUSING ASSEMBLY, COMPLETE (PAGE 2) (69 parts)

Ref	OEM Part #	Part Name
--	1638-4108A4	GEAR HOUSING ASSEMBLY, COMPLETE Comment: LEFT HAND ROTATION-MERC 1250BP NOTE: GEAR HOUSING ASSEMBLIES, COMPLETE, INCLUDE ALL PARTS FROM REFERENCE #4 THRU REFERENCE #127 AS LISTED ON G4 AND G6
59	1638-4108A1	GEAR HOUSING ASSEMBLY (MERC 1250BP)
60	22-8M0180564	PLUG, PIPE (1/4-18 THREAD)
62	16-32129	STUD, GEAR HOUSING TO SPACER (2 3/8")
63	16-49082	STUD,GEAR HOUSING TO SPACER (3 3/4")
64	31-48937	ROLLER BEARING, DRIVE SHAFT
65	22-49523	ELBOW, OIL TUBE (45 )
66	10-79953Q04	SCREW, VENT AND FILLING
67	12-191833	WASHER, SEALING-VENT AND FILLING SCREW
68	31-30956T	ROLLER BEARING, PROPELLER SHAFT
69	26-55285	OIL SEAL, PROPELLER SHAFT
70	12-39701	WASHER, SPLINED-PROPELLER NUT
71	12-39698	WASHER, PLAIN-PROPELLER NUT
72	11-859126	NUT, PROPELLER
73	44-48882	PROPELLER SHAFT
74	23-56802	SPACER, PROPELLER SHAFT
75	15-20929A1	SHIM ASSEMBLY, PROPELLER SHAFT
76	31-38146A1	ROLLER BEARING ASSEMBLY, TAPERED-REAR
77	57206A1	ADATPOR ASSEMBLY, PROPELLER SHAFT
78	31-54043	ROLLER BEARING, ADAPTOR
79	43-48885	GEAR, PROPELLER SHAFT-REAR Comment: RIGHT HAND ROTATION
80	23-57205	SPACER, PROPELLER SHAFT-LONG Comment: RIGHT HAND ROTATION
81	43-48890	GEAR, DOUBLE BEVEL-PROPELLER SHAFT Comment: RIGHT HAND ROTATION
82	23-48934	SPACER, PROPELLER SHAFT-SHORT Comment: RIGHT HAND ROTATION
83	12-49808	WASHER, PROPELLER SHAFT Comment: LEFT HAND ROTATION
84	23-49809	SPACER, PROPELLER SHAFT-SHORT Comment: LEFT HAND ROTATION
85	43-48890	GEAR, DOUBLE BEVEL-PROPELLER SHAFT Comment: LEFT HAND ROTATION
86	23-57205	SPACER, PROPELLER SHAFT-LONG Comment: LEFT HAND ROTATION
87	43-48949	GEAR, PROPELLER SHAFT Comment: LEFT HAND ROTATION
88	31-38135A1	ROLLER BEARING ASSEMBLY, TAPERED-PROPELLER SHAFT
89	12-48933	WASHER, PROPELLER SHAFT
90	11-8M2014641	NUT, PROPELLER SHAFT
91	23-48932	SPACER, BEARING RETAINER TO GEAR HOUSING
92	11-48931	NUT, BEARING RETAINER
93	48942	ANCHOR STUD, BEARING RETAINER
94	25-8M0204651	"O" RING, ANCHOR STUD
95	12-48930	WASHER, ANCHOR STUD
96	53-48928	RING, SNAP-ANCHOR STUD TO GEAR HOUSING
97	48929	COVER, GEAR HOUSING
98	17-30282	PIN, NOSE CONE LOCATING
99	48904	CONE, NOSE-GEAR HOUSING
100	10-39703	SCREW, NOSE CONE TO GEAR HOUSING
101	12-45176	WASHER, GEAR HOUSING STUDS
102	11-8M0204653	NUT, GEAR HOUSING STUDS
103	25-45719	"O" RING, GEAR HOUSINF STUD
104	49526A1	PLATE ASSEMBLY, COVER
105	22-49521	ELBOW, PLATE TO OIL TUBE (90 )
106	32-54989	TUBE, OIL-GEAR HOUSING TO COVER PLATE
107	10-49527	SCREW, COVER PLATE TO GEAR HOUSEING (1")
108	13-21272	LOCKWASHER, COVER PLATE SCREW
109	12-39143	WASHER, COVER PLATE SCREW
110	43-48886	GEAR, PINION-DRIVE SHAFT(LOWER)
111	11-49253	NUT, LOCK-PINION GEAR TO DRIVE SHAFT
112	45-48880	DRIVE SHAFT, REAR
113	15-8M0063268	SHIM ASSEMBLY, REAR DRIVE SHAFT
114	31-48939A1	ROLLER BEARING ASSEMBLY, TAPERED-REAR DRIVE SHAFT
115	43-48887A1	GEAR ASSMBLY, DRIVE SHAFTS
116	45-48879	DRIVE SHAFT, CENTER
117	15-24542A1	SHIM ASSEMBLY, CENTER DRIVE SHAFT
118	30-53280	BALL BEARING, CENTER DRIVE SHAFT
119	12-35981	WASHER, CENTER DRIVE SHAFT
120	11-8M0214915	NUT, GEAR TO CENTER DRIVE SHAFT
121	45-48878	DRIVE SHAFT, FRONT
122	15-20929A1	SHIM ASSEMBLY, FRONT DRIVE SHAFT
123	30-53279	BALL BEARING, FRONT DRIVE SHAFT
124	11-30932	NUT, GEAR TO FRONT DRIVE SHAFT
125	48891	RETAINER, BEARING
126	10-53099	SCREW, BEARING RETAINER TO GEAR HOUSING (3/4")
127	13-26992	LOCKWASHER, BEARING RETAINER SCREW

▶MISCELLANEOUS PARTS/ACCESSORIES (1 parts)

Ref	OEM Part #	Part Name
-	49248A1	REVERSE THROTTLE LIMIT KIT

▶STARTER MOTOR ASSEMBLY (18 parts)

Ref	OEM Part #	Part Name
-	50-55304A1	STARTER MOTOR ASSEMBLY, COMPLETE (PRESTOLITE)
--	392-2516	BUSHING, COMMUTATOR END CAP
1	11-8M0143423	NUT, PINION STOP COLLAR
2	32406	MOTOR DRIVE
3	24-32407	SPRING, TENSION - MOTOR DRIVE
4	392-3693	PLATE ASSEMBLY, DRIVE END
5	392-2518	BUSHING, DRIVE END PLATE
6	392-3906	ARMATURE
7	392-2523	PACKAGE, ARMATURE THRUST WASHER
8	392-3407	FRAME AND FIELD ASSEMBLY
9	392-2521	BRUSH AND TERMINAL SET
10	392-2514	SPRING SET, BRUSH (2 SPRINGS PER SET)
11	392-2519	BRUSH PLATE AND HOLDER ASSEMBLY
12	392-3692	END CAP ASSEMBLY, COMMUTATOR
13	16-64936	STUD, STARTER MOTOR MOUNTING (1 3/16")
14	392-3694	BOLT, THRU - END CAP TO END PLATE (5/16 -13)
15	13-8M0204647	LOCKWASHER, THRU BOLT
16	11-82670911	NUT, THRU BOLT

▶STARTER MOTOR, STARTER SOLENOID, RECTIFIER AND WIRING HARNES (45 parts)

Ref	OEM Part #	Part Name
1	84-69236A1	WIRING HARNESS, INTERNAL
2	54-76368	CLAMP, WIRING HARNESS TO BOTTOM COWL
3	10-45862	SCREW, WIRING HARNESS CLAMP TO BOTTOM COWL (7/8")
4	13-26996	LOCKWASHER, WIRING HARNESS CLAMP SCREW
5	12-847883	WASHER, WIRING HARNESS CLAMP SCREW
6	24-28975	SPRING, GARTER - INTERNAL WIRING HARNESS
7	10-98256	SCREW, GROUND WIRE TO BOTTOM COWL (1/2")
8	13-24669	LOCKWASHER, GROUND WIRE SCREW
9	25-26547	GROMMET, RECTIFIER TO SWITCH BOX WIRE
10	54-648552	CLIP, WIRING HARNESS TO FRONT BRACKET (1/8")
11	45559	TERMINAL BLOCK, STATOR LEADS
12	10-48409	SCREW, TERMINAL BLOCK FASTENING (5/8")
13	10-62568	SCREW, STATOR LEADS TO TERMINAL BLOCK (3/8")
14	332-2986A7	SWITCH BOX ASSEMBLY (MERC 1250BP)
15	12-45075	WASHER, SWITCH BOX TERMINAL
16	11-45076	NUT, SWITCH BOX TERMINAL
17	10-45218	SCREW, SWITCH BOX (3/8")
18	10-64279	SCREW, SWITCH BOX TO FRONT MOUNTING BRACKET (1")
19	11-8M0207775	NUT, SWITCH BOX SCREW
20	84-93389A12	CABLE, WIRE - STARTER MOTOR TO FRONT SUPPORT BRACKET
21	10-69035	SCREW, WIRE CABLE TO STARTER MOTOR
22	50-55304A1	STARTER MOTOR ASSEMBLY (SEE E14 FOR BREAKDOWN)
23	10-73657	SCREW, STARTER MOTOR TO CRANKCASE FLANGE (1 1/2")
24	10-31984	SCREW, STARTER MOTOR TO CRANKCASE FLANGE (1 3/8")
25	13-8M0204647	LOCKWASHER, STARTER MOTOR SCREW
26	53507	BRACKET, STARTER MOTOR SUPPORT
27	12-26168	WASHER, STARTER MOTOR MOUNTING STUD
28	11-82670911	NUT, STARTER MOTOR MOUNTING STUD
29	13-26992	LOCKWASHER, STARTER MOTOR TERMINAL
30	11-20890	NUT, STARTER MOTOR TERMINAL
31	25661T1	SOLENOID, STARTER
32	1397-2125	SCREW, SOLENOID TO COIL BRACKET (3/4")
33	13-26992	LOCKWASHER, STARTER SOLENOID FASTENING SCREW
34	269011	BUMPER, RUBBER - STARTER SOLENOID
35	10,13-26996	LOCKWASTER, SOLENOID TERMINAL
36	10,11-68219	NUT, SOLENOID TERMINAL
37	48396	CABLE, WIRE - STARTER MOTOR TO SOLENOID
38	13-8M0204647	LOCKWASHER, SOLENOID TERMINAL ( 5/16")
39	11-22053	NUT, SOLENOID TERMINAL (5/16")
40	46265	BOOT, SOLENOID TERMINAL
41	78614A1	RECTIFIER ASSEMBLY
42	10-64278	SCREW, RECTIFIER TO MOUNTING BRACTER (1")
43	11-8M0207775	NUT, RECTIFIER MOUNTING SCREW
44	12-45075	WASHER, RECTIFIER STATOR LEAD TERMINAL
45	11-45076	NUT, FASTENING - RECTIFIER STATOR LEADS

▶TOP COWL AND SUPPORT BRACKETS (36 parts)

Ref	OEM Part #	Part Name
1	2114-3806	COWL, TOP
2	52733A9	RETAINER ASSEMBLY, TOP COWL
3	35496	PAD, BUMPER - TOP COWL RETAINER
4	10-74824	SCREW, RETAINER TO TOP COWL (1 1/4'')
5	13-39107	LOCKWASHER, RETAINER TO TOP COWL SCREW
6	76370	SHIELD, TOP COWL - REAR
7	10-37370	SCREW, SHIELD TO TOP COWL (5/8'')
8	13-37371	LOCKWASHER, SHIELD SCREW
9	47341A11	ROPE, STARTER (FOR MANUAL STARTING ONLY)
10	52739	HINGE, COWL LATCH - TOP COWL
11	94918F1	LEVER, COWL LATCH HINGE
12	17-58998	PIN, ROLL - COWL LATCH LEVER TO HINGE
13	24-53019	SPRING, COWL LATCH HINGE
14	55455	HOOK, TOP COWL LATCH - REAR
15	10-22956	SCREW, REAR HOOK TO TOP COWL (7/8")
16	13-26992	LOCKWASHER, REAR HOOK MOUNTING SCREW
17	48825	FRAME, TOP COWL SUPPORT
18	46096	MOUNT, RUBBER - TOP COWL FRAME
19	11-82670911	NUT, RUBBER MOUNT TO TOP COWL FRAME
20	54685	BRACKET, TOP COWL SUPPORT - REAR
21	31014	MOUNT, RUBBER - REAR SUPPORT BRACKET
22	13-26992	LOCKWASHER, RUBBER MOUNT TO REAR SUPPORT BRACKET
23	12-69057	WASHER, RUBBER MOUNT TO REAR SUPPORT BRACKET
24	11-20088	NUT, RUBBER MOUNT TO REAR SUPPORT BRACKET
25	10-26065	SCREW, REAR BRACKET TO TOP COWL FRAME (1")
26	11-29250	NUT, REAR BRACKET SCREW
27	10-35386	SCREW,REAR BRACKET TO BOTTOM COWL (1")
28	13-8M0204647	LOCKWASHER, REAR SUPPORT BRACKET SCREW
29	77116A1	BRACKET ASSEMBLY, TOP COWL SUPPORT - FRONT
30	10-78841	SCREW, FRONT BRACKET TO BOTTOM COWL (1 1/2")
31	11-29250	NUT, FRONT SUPPORT BRACKET SCREW
32	10-73657	SCREW, FRONT BRACKET TO TOP COWL SCREW FRAME (1 1/2")
33	13-8M0204647	LOCKWASHER, FRONT SUPPORT BRACKET SCREW
34	37640	MOUNT, RUBBER - FRONT SUPPORT BRACKET
35	13-8M0204647	LOCKWASHER, RUBBER MOUNT TO FRONT SUPPORT BRACKET
36	11-22053	NUT, RUBBER MOUNT TO FRONT SUPPORT BRACKET

100-Hour / Annual Service Checklist

Regular maintenance keeps your Mercury 1250BP running reliably season after season. Most of these tasks can be performed with basic tools and the factory service manual.

Replace water pump impeller and inspect wear plate
Change engine oil and oil filter (check drain plug washer)
Replace spark plugs and check ignition timing
Drain and refill lower unit gear oil; inspect for water contamination
Inspect fuel lines, primer bulb, and fuel filter for deterioration
Check and replace sacrificial anodes (zinc or aluminum)
Inspect propeller for damage; check shaft seal and cotter pin
Check valve clearance (refer to service manual for specifications)
Lubricate all grease points (steering, tilt tube, shift linkage)
Inspect control cables and throttle/shift linkage for smooth operation

Pro Tip: Always flush the engine with fresh water after saltwater use — even a quick 10-minute flush significantly extends component life.
Pro Tip: Use fuel stabilizer in the tank before winter storage, and fog the cylinders to prevent internal corrosion during extended periods of non-use.

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Mercury 1250BP (2641855 THRU 3253111) Parts & Diagrams

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