Mercury 1250 (2314956 THRU 2839368) Parts & Diagrams

OEM and aftermarket replacement parts for Mercury 1250. Scroll down for exploded parts diagrams (19), specifications, and maintenance reference.

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11-52707Q1 Propeller Nut Tab Washer Kit for Mercury Force | JLM Marine
11-52707Q1 Propeller Nut Tab Washer Kit for Mercury Force | JLM Marine
$17.96
$17.96
files/12_1f442b5b-5eb3-4dbd-87cf-30a2bbe49863.jpgDefault Title
$17.96
photo of red spark plug wire jlm marine 18-8819; right-angled black boot on one end, conical black boot with visible metallic terminal on other end
Cable de bujía de 7 pulgadas compatible con motores fueraborda Mercury Marine de 150, 175 y 200 HP 18-8819
$21.10
$21.10
files/7_inches_Spark_Plug_Wire_fits_Mercury_Marine_150_175_200_HP_Outboard_Motors______18-8819_-_JLM_MARINE-8286634.jpgDefault Title
$21.10
Gearcase Drain Plug – Fits Mercury/MerCruiser Marine Engines (Replaces 10 - 79953Q04, 79953Q04) - JLM Marine Boat Parts Limited
Tapón de aceite no magnético de unidad inferior para motores fueraborda Mercury Mariner y MerCruiser Sterndrive 79953Q04
$21.50
$21.50
files/Lower_Unit_Non-Magnetic_Oil_Plug_for_Mercury_Mariner_Outboard_and_MerCruiser_Sterndrive_______79953Q04_-_JLM_MARINE-8287053.jpgDefault Title
$21.50
Water Pump Impeller Repair Kit – Fits Mercury/Mariner 65–225 HP (Replaces 47 - 89984T5) - JLM Marine Boat Parts Limited
Kit de impulsor de bomba de agua para Mercury de 65 a 225 hp 47-89984T5
$38.50
$38.50
files/Water_Pump_Impeller_Kit_for_Mercury_65_to_225_hp_47-89984T5_-_JLM_MARINE-8289819.jpgDefault Title
$38.50
Water Pump Impeller – Fits Mercury/Mercruiser/OMC/Johnson/Evinrude 65 - 225 HP (Replaces 47 - 89984T4) - JLM Marine Boat Parts Limited
Kit de impulsor de bomba de agua para Mercury / Mercruiser / OMC / Johnson / Evinrude. Juego de servicio de impulsor de 65 a 225 hp 47-89984T4
$21.50
$21.50
files/Water_Pump_Impeller_Kit_for_Mercury_-__Mercruiser_-_OMC_-_Johnson_-_Evinrude_Impeller_Service_Set_65_to_225_hp_47-89984T4_-_JLM_MARINE-8289798.jpgDefault Title
$21.50
9 - inch Spark Plug Wire – Fits Mercury Marine 150 - 175 - 200HP Outboards - JLM Marine Boat Parts Limited
Cable de bujía de 9 pulgadas compatible con motores fueraborda Mercury Marine de 150, 175 y 200 HP 18-5228
$20.19
$20.19
files/9_inches_Spark_Plug_Wire_fits_Mercury_Marine_150_175_200_HP_Outboard_Motors___18-5228_-_JLM_MARINE-8286628.jpgDefault Title
$20.19
Water Pump Impeller Kit – Fits Mercury/Mercruiser 65–225 HP (Replaces 47 - 89984T5) - JLM Marine Boat Parts Limited
Kit de impulsor de bomba de agua para Mercury 65 hasta 225 hp 46-96148A5
$38.50
$38.50
files/Water_Pump_Impeller_Kit_for_Mercury_65_up_to_225_hp_46-96148A5_-_JLM_MARINE-8289811.jpgDefault Title
$38.50
Water Pump Impeller – Fits Honda 8–20 HP Outboards (Replaces 19210 - ZW9 - A31, 19210 - ZW9 - A32) - JLM Marine Boat Parts Limited
Impulsor de bomba de agua para Honda 8-20 HP 18-32455
$16.69
$16.69
files/Water_Pump_Impeller_for_Honda_8-20_HP__18-32455_-_JLM_MARINE-8288256.jpgDefault Title
$16.69
47-803631T Water Pump Impeller for Mercury Mercruiser Force | JLM Marine
47-803631T Water Pump Impeller for Mercury Mercruiser Force | JLM Marine
$17.99
$17.99
files/2fef3a828babec6d.jpgDefault Title
$17.99

Mercury 1250 (2314956 THRU 2839368) Parts & Diagrams

🔎 Mercury 1250 Reference Library — Exploded parts diagrams (19 diagrams), specifications, common issues, and maintenance checklist.

The Mercury 1250 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 1250:

  • 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 1250.

▶BOTTOM COWL AND SHIFT LINKAGE (54 parts) BOTTOM COWL AND SHIFT LINKAGE
Ref OEM Part # Part Name
1 2115-3807 COWL, BOTTOM
2 52862A2 CRIP 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 10-37561 SCREW, WIRING HARNESS SUPPORT TO BOTTOM COWL (2 1/2")
14 11-8M0207775 NUT, WIRING HARNESS SUPPORT SCREW
15 32-8M0108355 HOSE, TELL TALE - EXHAUST COVER TO BOTTOM COWL (16")
16 22-291112 CONNECTOR, TELL TALE HOSE TO BOTTOM COWL
16A 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 27-56304 GASKET, POWERHEAD TO EXHAUST EXTENSION PLATE
21 56306A2 PLATE ASSEMBLY, EXHAUST EXTENSION
22 26-38970 SEAL, RUBBER - WATER INLET TUBE
23 38448 RETAINER, WATER TUBE SEAL
24 10-69069 SCREW, RETAINER TO EXHAUST EXTENSION PLATE (3/4")
25 10-24226 SCREW, EXHAUST EXTENSION PLATE TO DRIVE SHAFT HOUSING
26 11-8M0207775 NUT, EXHAUST EXTENSION PLATE SCREW
27 27-48801 GASKET, EXHAUST EXTENSION PLATE TO DRIVE SHAFT HOUSING
28 37918 SEAL, EXHAUST EXTENSION PLATE
29 99358 STRIP, RETAINING - EXHAUST EXTENSION PLATE SEAL
30 10-37571 SCREW, SEAL AND RETAINING STRIP TO EXTENSION PLATE (1/2")
31 60304A54 SHIFT SHAFT ASSEMBLY, UPPER (LONG SHAFT) Comment: SERIAL 02653880-09999999
32 23-26600 BUSHING, SHIFT SHAFT Comment: SERIAL 02653880-09999999
33 93960A1 COUPLING, SHIFT SHAFT Comment: SERIAL 02653880-09999999
34 73402 LINK ROD ASSEMBLY
35 12-24664 WASHER, LINK ROD
36 13-29720 WASHER, WAVE - LINK ROD
37 52732A6 BRACKET ASSEMBLY, ANCHOR CONTROL CABLES
38 49935 CAP, BRASS BARREL TO THROTTLE CABLE
39 10-35386 SCREW, ANCHOR BRACKET TO CYLINDER BLOCK (1")
40 24-20099 SPRING, LINK ROD TO GUIDE BLOCK
41 37896 GUIDE BLOCK, LINK ROD
42 52100 WEAR PLATE, LINK ROD (NOT AS SHOWN)
43 8M0036768 LATCH, CONTROL CABLE FASTENING - ANCHOR BRACKET
44 12-69056 WASHER, PLAIN - LINK ROD
45 11-826709109 NUT, LINK ROD
46 49932A1 LEVER ASSEMBLY, CONTROL CABLE LOCKING - ANCHOR BRACKET
47 24-37911 SPRING, CONTROL CABLE LOCKING LEVER
48 17-239281 PIN, ROLL - CONTROL CABLE LOCKING LEVER
49 24-38472 SPRING, CONTROL CABLE TENSION - ANCHOR BRACKET
50 46933A1 GROUND STRAP ASSEMBLY, CRANKCASE TO COWL (3 5/8")
51 46933A2 GROUND STRAP ASSEMBLY, HOUSING TO COWL (3 3/8")
52 10-62568 SCREW, GROUND STRAP FASTENING
53 13-69432 LOCKWASHER, GROUND STRAP SCREW
▶CARBURETOR ASSEMBLY (23 parts) CARBURETOR ASSEMBLY
Ref OEM Part # Part Name
-- 1395-92621 REPAIR PARTS KIT (1 PER CARBURETOR)
1 1348-3718 CARBURETOR ASSEMBLY, COMPLETE (KD-2A) SEE NOTE ON PG 14
2 1395-8673 FLOAT ASSEMBLY SEE NOTE ON PG 14
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 FASTENING
19 1395-6027 SCREW, THROTTLE STOP LEVER
20 8146791 LEVER, THROTTLE STOP (SEE NOTE BELOW)
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 (35 parts) CARBURETOR LINKAGE AND CHOKE SOLENOID
Ref OEM Part # Part Name
-- 28-89694 INSERT, THROTTLE COUPLING Comment: SERIAL 02654513-09999999
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 1348-3718 CARBURETOR ASSEMBLY, COMPLETE (KD-2)
10 53720A2 THROTTLE PICK-UP BRACKET ASSEMBLY Comment: SERIAL 02654513-09999999
11 10-53651 SCREW, THROTTLE BRACKET MOUNTING Comment: SERIAL 02654513-09999999
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 90242A1 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 STO CARBURETOR (5/8")
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 (61 parts) CLAMP AND SWIVEL BRACKET ASSEMBLY
Ref OEM Part # Part Name
-- 11-8M0207775 NUT, LOWER SHOCK PIN SCREW (LONG SHAFT
1 1440-8394A1 CLAMP BRACKET ASSEMBLY
2 28403A3 THUMB SCREW ASSEMBLY
3 12-28404 WAHSER, THUMB SCREW
4 8M0041936 TUBE, TILT - CLAMP BRACKET TO SWIVEL BRACKET
5 12-52864 WASHER, CLAMP BRACKET TILT TUBE
6 11-858869 NUT, TILT TUBE FASTENING
7 53078 CAP, PLASTIC - TILT TUBE
8 23-59624 SPACER, CLAMP BRACKET STUD
10 13-8M0204647 LOCKWASHER, CLAMP BRACKET STUD
11 11-22053 NUT, CLAMP BRACKET STUD
12 17-8M0026068 TILT LOCK PIN ASSEMBLY
13 32-28052 SLEEVE, RUBBER - TILT PIN BUMPER
14 1482-6386A4 SWIVEL BRACKET ASSEMBLY (LONG SHAFT)
15 26-37448 OIL SEAL, SWIVEL BRACKET
16 10-47828 SCREW, DRIVE - SWIVEL BRACKET
17 22-69059 FITTING, GREASE - SWIVEL BRACKET
18 19-77633Q LUBRICAP, SWIVEL BRACKET GREASE FITTING
19 24-94891 SPRING, COIL - SWIVEL BRACKET
20 17-38311 PIN, COIL SPRING MOUNTING
21 76386 TILT LOCK ASEMBLY, STARBOARD
22 76385T TILT LOCK ASSEMBLY, PORT
23 47802 TUBE, TILT LOCK
24 18-47959 COTTER PIN, TILT LOCK TUBE
25 23-47803 BUSHING, TILT LOCK TUBE
26 13-69150 WASHER, WAVE - TILT LOCK TUBE
27 17-49840A1 SWIVEL PIN AND STEERING ARM ASSEMBLY (LONG SHAFT)
28 28203 BUMPER, STEERING ARM
29 10-49554 BOLT, STEERING ARM TO UPPER MOUNT (5 7/8")
30 11-8M0204653 NUT, STEERING ARM BOLT FASTENING
31 10-31830 SCREW, RIDE-GUIDE ATTACHING
32 11-8M0204726 NUT, RIDE-GUIDE ATTACHING SCREW
33 12-37429 WASHER, SWIVEL PIN - LOWER
34 73984T YOKE, BOTTOM
35 11-37424 NUT, SWIVEL PIN RETAINING
36 28205T STRAP STOP, DRIVE SHAFT HOUSING TO SWIVEL BRACKET
37 10-28200 SCREW, STRAP STOP TO DRIVE SHAFT HOUSING (2 7/8")
38 11-25269 NUT, STRAP STOP FASTENING SCREW
39 23-28688 SPACER, RUBBER - COIL SPRING POSITIONING
40 55-28416 PIN, UPPER SHOCK MOUNTING
41 10-68299 BOLT, CLAMP BRACKET TO BOAT TRANSOM (UPPER)
42 12-68300 WASHER, CLAMP BRACKET BOLT (UPPER)
43 11-82670912 NUT, CLAMP BRACKET BOLT
44 38-56267 SERIAL PLATE
45 10-25612 SCREW, DRIVE - SERIAL PLATE TO SWIVEL BRACKET
46 17-25598 PIN, REVERSE LOCK SPRING ATTACHING
47 24-29821 SPRING, REVERSE LOCK TENSION
48 87431 REVERSE LOCK ASSEMBLY
49 56349 SHAFT, REVERSE LOCK PIVOT
50 18-45882 COTTER PIN, REVERSE LOCK TO SHAFT
51 55-28414 PIN, LOWER SHOCK MOUNTING (LONG SHAFT
52 23-28199 SPACER, UPPER SHOCK BUSHING TO CLAMP BRACKET
53 12-28196 WASHER, UPPER BUSHING RETAINER (INNER)
54 12-8M0204695 WASHER, LOWER BUSHING RETAINER (INNER)
55 55-58780A7 SHOCK ABSORBER
56 23-32171 BUSHING, RUBBER - SHOCK ABSORBER (UPPER)
57 23-28198 BUSHING, RUBBER - SHOCK ABSORBER (LOWER)
58 12-8M0204648 WASHER, UPPER AND LOWER BUSHING RETAINER (OUTER)
59 10-69375A1 SCREW, UPPER AND LOWER SHOCK MOUNTING PIN
60 70679 COVER, UPPER AND LOWER SHOCK MOUNTING PIN
61 10-37655 SCREW, COVER TO SHOCK MOUNTING SCREW
▶COWLING AND FRONT COVER (16 parts) COWLING AND FRONT COVER
Ref OEM Part # Part Name
-- 92-271091 ADHESIVE COMPOUND, EMBLEM FASTENING
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 2136-4660A4 WRAP AROUND COWL ASSEMBLY
13 46785A1 COWL LATCH ASSEMBLY
14 30413 HOOK, COWL LATCH FASTENING
15 30021 BLANKET, SOUND ABSORBING
▶CRANKSHAFT, PISTONS AND CONNECTING RODS (28 parts) CRANKSHAFT, PISTONS AND CONNECTING RODS
Ref OEM Part # Part Name
1 436-9072A1 CRANKSHAFT ASSEMBLY (NOT AS SHOWN)
2 11-52901 NUT, FLYWHEEL TO CRANKSHAFT
3 30-62567T BEARING, BALL - UPPER
4 30-63742T BEARING, BALL - LOWER Comment: SERIAL 02709828-09999999
5 535-3190A2 CENTER MAIN BEARING ASSEMBLY
6 17-20032 DOWEL PIN, CENTER MAIN BEARING
7 29-714221 BEARING, NEEDLE - OUTER RACE
8 26113T RACE, OUTER (PAIR)
9 53-26933 RING, SMAP - OUTER RACE
10 17-47246 DOWEL PIN, STEPPED
11 10-22968 SCREW, CENTER MAIN BEARING CLAMPING
12 11-8M0207775 NUT, BEARING CLAMPING SCREW
13 540-7238A2 MAIN BEARING ASSEMBLY, VALVE TYPE
14 17-20032 DOWEL PIN, MAIN BEARING
15 10-45775 SCREW, MAIN BEARING CLAMPING
16 11-45774 NUT, MAIN BEARING CLAMPING SCREW
17 34-56007A1 REED SET, MATCHED - MAIN BEARING
18 34-48081 REED STOP, MAIN BEARING REED VALVES
19 10-20597 SCREW, REED STOP MOUNTING
20 742-3512A2 PISTON AND PISTON PIN ASSEMBLY "C" TYPE LOCK RING Comment: SEE DRAWING BELOW
21 53-857196 LOCK RING, PISTON PIN "C" TYPE LOCK RING Comment: SEE DRAWING BELOW
22 39-78816A12 RING, PISTON (1/16" THICK) "C" TYPE LOCK RING Comment: SEE DRAWING BELOW
23 624-8101A3 CONNECTING ROD AND CAP ASSEMBLY
24 31-62596A1 BEARING ASSEMBLY, CRANKPIN
25 10-54803 SCREW, CONNECTING ROD
26 11-49091 NUT, CONNECTING ROD SCREW
27 29-8M0214934 BEARING NEEDLE - PISTON PIN
28 12-8M0032839 WASHER, NEEDLE LOCATING
▶CYLINDER BLOCK AND CRANKCASE ASSEMBLY (64 parts) CYLINDER BLOCK AND CRANKCASE ASSEMBLY
Ref OEM Part # Part Name
-- 12-22753 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 (A")
6 846-3181A7 CYLINDER BLOCK AND CRANKCASE ASSEMBLY (NOT AS SHOWN)
7 27-53862 GASKET, CRANKCASE TO CYLINDER BLOCK
8 22-328022 PLUG, PIPE - WATER PRESSURE HOSE
9 16-64936 STUD, CARBURETOR MOUNTING (1 3/16")
10 16-64281 STUD, CRANKCASE TO DRIVE SHAFT HOUSING (1 7/8")
11 17-43044 PIN, DOWEL - CRANKCASE TO CYLINDER BLOCK
12 17-20323 PIN, DOWEL - CYLINDER BLOCK TO MAIN BEARING
13 16-26134 STUD, CYLINDER BLOCK TO DRIVE SHAFT HOUSING (4 1/16")
14 16-48770 STUD, CYLINDER BLOCK TO DRIVE SHAFT HOUSING (3 9/16")
15 16-26324 STUD, CYLINDER BLOCK TO DRIVE SHAFT HOUSING (2 7/8")
16 10-53460 SCREW, CRANKCASE TO CYLINDER BLOCK (2 1/2") Comment: SERIAL 00270982-09999999
17 10-69091 SCREW, CRANKCASE TO CYLINDER BLOCK (1 5/8")
18 11-29250 NUT, CRANKCASE FASTENING SCREW
19 10-20359 SCREW, CENTER MAIN BEARING LOCKING
20 14-20091 TAB WASHER, BEARING LOCKING SCREW
21 1126-3196A3 END CAP ASSEMBLY, LOWER
22 21-28481A1 CHECK VALVE ASSEMBLY, END CAP
23 26-29478 OIL SEAL, LOWER
24 26-41953 OIL SEAL, UPPER
25 25-20081 "O" RING
26 15-20085A1 SHIM, END CAP TO CRANKCASE (.002-3-5-10)
27 10-30225 SCREW, END CAP MOUNTING (1")
28 66696A1 COVER, WATER JACKET - CYLINDER BLOCK Comment: PART OF A-846-3181A7 CYLINDER BLOCK AND CRANKCASE ASSEMBLY
29 27-47228 GASKET, WATER JACKET COVER Comment: PART OF A-846-3181A7 CYLINDER BLOCK AND CRANKCASE ASSEMBLY
30 10-53167T SCREW, WATER JACKET COVER TO CYLINDER BLOCK (7/8") Comment: PART OF A-846-3181A7 CYLINDER BLOCK AND CRANKCASE ASSEMBLY
31 13-53166 LOCKWASHER, WATER JACKET COVER FASTENING SCREW Comment: PART OF A-846-3181A7 CYLINDER BLOCK AND CRANKCASE ASSEMBLY
32 27-47229 GASKET, CYLINDER BLOCK TO BAFFLE PLATE
33 62277A1 PLATE, BAFFLE - EXHAUST MANIFOLD
34 27-47227 GASKET, BAFFLE PLATE TO EXHAUST MANIFOLD COVER
35 47253 COVER, EXHAUST MANIFOLD
36 10-38837 SCREW, MANIFOLD COVER MOUNTING (1 1/8")
37 58124A4 SWITCH, MERCURY
38 10-28708 SCREW, MERCURY SWITCH TO FRONT MOUNTING BRACKET (1/2")
39 17-30496 PIN, ROLL - MERCURY SWITCH
40 10-62568 SCREW, MERCURY SWITCH LEAD
41 1011-3208 COVER, CYLINDER BLOCK
42 27-47226 GASKET, CYLINDER BLOCK COVER
43 10-21091 SCREW, CYLINDER BLOCK COVER MOUNTING (1 1/8")
44 11-8M0207775 NUT, COVER MOUNTING SCREW
45 22-328022 PLUG, PIPE - CYLINDER BLOCK COVER
46 37440 BRACKET, MOUNT SUPPORT - CYLINDER BLOCK
47 10-35386 SCREW, BRACKET TO CYLINDER BLOCK (1")
48 47236 COVER, TRANSFER PORT
49 27-472511 GASKET, TRANSFER PORT COVER
50 10-28635 SCREW, TRANSFER PORT COVER MOUNTING (5/8")
51 22-67902 CONNECTOR, CYLINDER BLEED HOSE - LOWER AND UPPER
52 32-9912688 HOSE, UPPER AND LOWER CYLINDER BLEED (9 1/2")
53 22-62365A1 CHECK VALVE ASSEMBLY, BLEED HOSE
54 21-28481A1 CHECK VALVE ASSEMBLY
55 54-20387 CLAMP, BLEED HOSE TO CONNECTOR
56 22-432881 TEE, BLEED HOSE TO CYLINDER BLOCK - CENTER
57 32-9912688 HOSE, CENTER CYLINDER BLEED (9 1/2")
58 32-8M0108355 TUBE, BALANCE - MAIN BEARING
59 22-53491 TEE, BLEED HOSE TO CYLINDER BLOCK - LOWER
60 32-9912688 HOSE, CYLINDER BLEED - LOWER (8 1/2")
61 22-20781 ELBOW, BALANCE TUBE TO MAIN BEARING SCREW
62 22-8585531 TEE, BALANCE TUBE TO MAIN BEARING SCREW
63 54-20386 CLAMP, BALANCE TUBE TO ELBOW AND TEE
▶DISTRIBUTOR ADAPTOR AND PILOT ASSEMBLY (58 parts) DISTRIBUTOR ADAPTOR AND PILOT ASSEMBLY
Ref OEM Part # Part Name
1 45-47982 DRIVE SHAFT, DISTRIBUTOR
2 48667 PILOT, DISTRIBUTOR MOUNTING
3 24-54639 SPRING, DISTRIBUTOR PILOT TO THROTTLE LEVER (3 17/32") Comment: WHEN ORDERING REPLACEMENT PART, MEASURE LENGTH OF SPRING TO INSURE RECEIVING CORRECT PART.
4 30109 GROUND STRAP, DISTRIBUTOR ADAPTOR CRANKCASE
5 10-62568 SCREW, GROUND STRAP TO CRANKCASE (3/8")
6 10-69067 SCREW, DISTRIBUTOR PILOT TO DISTRIBUTOR (1 3/8") USE WITH 3 Comment: USE WITH 3 17\32" SPRING SEE REF. #3
7 13-26992 LOCKWASHER, DISTRIBUTOR PILOT SCREW
8 48676 LINK, DISTRIBUTOR PILOT TO DISTRIBUTOR ADVANCE ARM
9 23-26856 BUSHING, NYLON - DISTRIBUTOR PILOT
10 12-20583 WASHER, DISTRIBUTOR PILOT LINK
11 18-210711 COTTER PIN, LINK TO DISTRIBUTOR PILOT
12 53635 SWIVEL, LINK TO DISTRIBUTOR ADVANCE ARM
13 11-30506 NUT, JAM - LINK TO SWIVEL
14 12-46246 WASHER, DISTRIBUTOR TO PILOT
15 30-20066 BEARING, BALL - DISTRIBUTOR PILOT
16 48691 CAM, DISTRIBUTOR
17 10-48673 SCREW, CAM FOLLOWER TO DISTRIBUTOR ADVANCE ARM
18 48678 CAM FOLLOWER, DISTRIBUTOR ADVANCE ARM
19 48690 COLLAR, ECONOMIZER
20 10-49990 SCREW, DISTRIBUTOR CAM TO ECONOMIZER COLLAR (1")
21 12-847883 WASHER, DISTRIBUTOR CAM SCREW
22 22-25094 FITTING, GREASE - ECONOMIZER COLLAR
23 48692 COLLAR, THROTTLE ACTUATOR
24 10-48675 SCREW, ADJUSTING - THROTTLE ACTUATOR COLLAR (1 1/2")
25 11-20890 NUT, ADJUSTING SCREW
26 52023 CAP, NYLON - ADJUSTING SCREW
27 48671 PLATE, THROTTLE ACTUATOR
28 54239 CAM, THROTTLE ACTUATOR PLATE
29 10-37892 SCREW, ACTUATOR PLATE TO ECONOMIZER COLLAR (1")
30 13-26996 LOCKWASHER, ACTUATOR PLATE SCREW
31 12-847883 WASHER, ACTUATOR PLATE SCREW
32 23-48674 SPACER, ACTUATOR PLATE SCREW
33 66165A2 ADAPTOR ASSEMBLY, DISTRIBUTOR
34 22-25094 FITTING, GREASE - DISTRIBUTOR ADAPTOR
35 10-78841 SCREW, DISTRIBUTOR ADAPTOR TO CRANKCASE FLANGE (1 1/2")
36 12-20084 WASHER, DISTRIBUTOR ADAPTOR SCREW
37 11-22053 NUT, DISTRIBUTOR ADAPTOR SCREW
38 12-27939 WASHER, THRUST - DISTRIBUTOR ADAPTOR
39 14-27960 TAB WASHER, CAP LOCKING
40 13-27959 WASHER, WAVE - TAB WASHER TENSION
41 27955 CAP, DISTRIBUTOR ADAPTOR AND PILOT
42 23-47250 SPACER, DRIVEN PULLEY
43 29906A1 DRIVEN PULLEY ASSEMBLY
44 17-29908 PIN, DRIVEN PULLEY
45 29907 FLANGE, DRIVEN PULLEY
46 10-64652 SCREW, PULLEY CLAMPING (5/8")
47 28-29910 KEY, DISTRIBUTOR DRIVING
48 20140 BELT, TIMING
49 48670 BRACKET, STOP
50 10-31983 SCREW, STOP BRACKET TO DISTRIBUTOR ADAPTOR (3/4")
51 12-20533 WASHER, STOP BRACKET SCREW
52 10-24228 SCREW, STOP BRACKET ADJUSTING (1 7/8")
53 11-20890 NUT, STOP BRACKET ADJUSTING SCREW
54 26852 CAP, NYLON - ADJUSTING SCREW
55 48668A1 ARM ASSEMBLY, DISTRIBUTOR ADVANCE
56 23-49537 BUSHING, DISTRIBUTOR ADVANCE ARM
57 10-49285 BOLT, DISTRIBUTOR ADVANCE ARM TO STOP BRACKET
58 12-26825 WASHER, DISTRIBUTOR ADVANCE ARM BOLT
▶DISTRIBUTOR ASSEMBLY, COMPLETE (32 parts) DISTRIBUTOR ASSEMBLY, COMPLETE
Ref OEM Part # Part Name
- 393-2799A11 DISTRIBUTOR ASSEMBLY, COMPLETE
-- 8M0084600 CONNECTOR, SPARK PLUG LEAD
1 393-2799A21 HOUSING ASSEMBLY, PRIMARY
2 10-45218 SCREW, TRIGGER HOUSING TO PRIMARY HOUSING
3 13-26917 WASHER, WAVE - PRIMARY HOUSING
4 30-26379 BEARING, BALL - ROTOR SHAFT
5 53-45906 RING, RETAINER - ROTOR SHAFT BALL BEARING
6 393-3269A6 ROTOR SHAFT ASSEMBLY
7 393-2795 SHIM, TRIGGER HOUSING TO PRIMARY HOUSING
8 393-2918A6 TRIGGER HOUSING ASSEMBLY
9 393-3014A2 ADAPTOR ASSEMBLY, HOUSING TO DISTRIBUTOR CAP
10 27-46351 GASKET, ADAPTOR TO PRIMARY HOUSING
11 17-20032 DOWEL PIN, ADAPTOR TO PRIMARY HOUSING
12 10-32627 SCREW, ADAPTOR TO HOUSING (1 1/2")
13 11-46438 NUT, ADAPTOR TO HOUSING SCREW
14 22-31521A1 ELBOW ASSEMBLY, VENT HOSE - ADAPTOR HOUSING
15 27-36268 GASKET, DISTRIBUTOR TO ADAPTOR
16 393-1927A9 DISTRIBUTOR CAP ASSEMBLY
17 393-1293A1 BRUSH AND SPRING ASSEMBLY
18 22-31521 ELBOW, VENT HOSE - DISTRIBUTOR CAP
19 10-60464 SCREW, DISTRIBUTOR CAP TO ADAPTOR TO HOUSING (2")
20 12-89302 WASHER, DISTRIBUTOR CAP FASTENING SCREW
21 11-46438 NUT, DISTRIBUTOR CAP FASTENING SCREW
22 393-2725 COVER, SIDE INLET - DISTRIBUTOR
23 27-26447 GASKET, SIDE INLET COVER TO DISTRIBUTOR CAP
24 10-35400 SCREW, SIDE INLET COVER TO DISTRIBUTOR CAP (7/16")
25 84-821945A8 HIGH TENSION CABLE ASSEMBLY - DISTRIBUTOR TO COIL
26 85-94589 SLEEVE, TERMINAL END COVER
27 25-26547 GROMMET, SPARK PLUG LEAD
28 332-2854T01 BOOT, HIGH TENSION CABLE TO COIL
29 84-813715A1 SPARK PLUG LEAD ASSEMBLY
30 85-63709A1 PROTECTOR, SPARK PLUG LEAD
▶DISTRIBUTOR VERTICAL LINKAGE AND IGNITION COILS (40 parts) DISTRIBUTOR VERTICAL LINKAGE AND IGNITION COILS
Ref OEM Part # Part Name
1 27947 SWIVEL, LINKAGE - ECONOMIZER COLLAR
2 25996A1 SWIVEL AND LINK ROD ASSEMBLY
3 11-25168 NUT, UPPER LINK ROD ADJUSTING
4 37700 ROD, LINK - UPPER
5 27948 SWIVEL, UPPER LINK ROD TO THROTTLE CONTROL LEVER
6 48856 LEVER, THROTTLE CONTROL
7 12-8M0204649 WASHER, THROTTLE CONTROL LEVER SWIVEL
8 13-25806 WASHER, WAVE - THROTTLE CONTROL LEVER SWIVEL
9 11-8267089 NUT, UPPER LINK ROD SWIVEL TO THROTTLE CONTROL
10 10-31830 SCREW, THROTTLE LEVER TO EXHAUST MANIFOLD COVER (1 3/4")
11 12-8M0042641 WASHER, THROTTLE CONTROL LEVER SCREW
12 23-45818 BUSHING, THROTTLE CONTROL LEVER
13 11-8M0204726 NUT, THROTTLE CONTROL LEVER SCREW
14 37587 SWIVEL, LOWER - THROTTLE CONTROL LEVER TO THROTTLE CABLE
15 11-8267089 NUT, THROTTLE CABLE TO LOWER SWIVEL
16 393-2799A11 DISTRIBUTOR ASSEMBLY, COMPLETE
17 45409 WIRE RETAINER, HIGH TENSION LEADS
18 45392 BRACKET, FRONT - WIRE RETAINER
19 47398 BRACKET, REAR - WIRE RETAINER
20 10-62568 SCREW, FRONT AND REAR BRACKET ATTACHING
21 45391 SPACER, RUBBER - HIGH TENSION LEADS
22 33-896329827 SPARK PLUG (CHAMPION - L19V)
23 32-8M0108355 HOSE, VENT - DISTRIBUTOR TO ELBOW (13")
24 32-8M0108355 HOSE, VENT - DISTRIBUTOR TO ELBOW (16")
25 22-31521 ELBOW, VENT HOSE TO BOTTOM COWL
26 54-22875 CLAMP, VENT HOSE TO BOTTOM COWL
27 10-48591 SCREW, VENT HOSE CLAMP TO BOTTOM COWL (1/2")
28 8M0084613 "D" WASHER, VENT HOSE CLAMP SCREW
29 11-24656 NUT, VENT HOSE CLAMP SCREW
30 332-4895A5 IGNITION COIL ASSEMBLY, COMPLETE
31 10-46367 SCREW, IGNITION COIL CLAMPING - CLIP ATTACHING (2 1/2")
32 11-68219 NUT, IGNITION COIL CLAMPING SCREW
33 12-8M0204666 WASHER, IGNITION COIL CLAMPING SCREW
34 54-22740 CLIP, LEAD WIRE TO IGNITION COIL
35 8M0084613 "D" WASHER, IGNITION COIL CLAMPING SCREW
36 11-8267086 NUT, IGNITION COIL CLAMPING SCREW
37 10-69026 SCREW, COIL MOUNTING BRACKET (7/8")
38 13-26992 LOCKWASHER, COIL MOUNTING BRACKET
39 10-37561 SCREW, COIL MOUNTING BRACKET (2 1/2")
40 11-8M0207775 NUT, COIL MOUNTING BRACKET SCREW
▶DRIVE SHAFT HOUSING ASSEMBLY (53 parts) DRIVE SHAFT HOUSING ASSEMBLY
Ref OEM Part # Part Name
1 1551-3918A3 DRIVE SHAFT HOUSING ASSEMBLY (LONG SHAFT)
2 16-56295 STUD, DRIVE SHAFT HOUSING TO GEAR HOUSING
3 19-47579 PLUG, PLASTIC - TRIM TAB SCREW HOLE Comment: PART OF A-1552-3670A3 AND A-151-3669A4 DRIVE SHAFT HOUSING ASSEMBLIES
4 10-48409 SCREW, RETAINING STRIP TO DRIVE SHAFT HOUSING (5/8") Comment: PART OF A-1552-3670A3 AND A-151-3669A4 DRIVE SHAFT HOUSING ASSEMBLIES
5 10-48408 SCREW, RETAINING STRIP TO DRIVE SHAFT HOUSING (1/2") Comment: PART OF A-1552-3670A3 AND A-151-3669A4 DRIVE SHAFT HOUSING ASSEMBLIES
6 37417 COVER, TRIM - DRIVE SHAFT HOUSING
7 10-37571 SCREW, TRIM COVER TO BOTTOM COWL
8 37919 SEAL, TRIM COVER TO DRIVE SHAFT HOUSING
9 37665 STRIP, RETAINING - COVER SEAL (SIDE)
10 38052 STRIP, RETAINING - TRIM COVER SEAL (REAR)
11 32-37438 TUBE, WATER INLET (LONG SHAFT)
12 23-29591 SLEEVE, RUBBER - WATER INLET TUBE
13 38470 TUBE, EXHAUST (LONG SHAFT)
14 10-38601 SCREW, EXHAUST TUBE TO EXHAUST EXTENSION PLATE (5/8")
15 11-35888 NUT, EXHAUST TUBE SCREW
16 11-82670911 NUT, POWERHEAD STUDS (5/16-24)
17 11-23161 NUT, POWERHEAD STUDS (3/8-24)
18 12-20086 WASHER, POWERHEAD STUDS
19 27-48801 GASKET, EXHAUST EXTENSION PLATE TO DRIVE SHAFT HOUSING
20 52887 GUIDE, PUSH ROD - REVERSE LOCKING
21 47558 ROD, PUSH - REVERSE LOCK (LONG SHAFT)
22 11-69254 NUT, JAM - PUSH ROD
23 47559 YOKE, PUSH ROD
24 24-78203A2 PIN, PUSH ROD TO REVERSE LOCK
25 18-25191 COTTER PIN, PUSH ROD PIN
26 75297 MOUNT, RUBBER - UPPER (HEAVY DUTY)
27 49239 COVER, UPPER MOUNT - OUTSIDE HALF
28 53141 COVER, UPPER MOUNT - INSIDE HALF
29 24929 PACKING, "U" CUP
30 10-20012 SCREW, UPPER MOUNT COVER (1 5/8")
31 10-28775 SCREW, UPPER MOUNT COVER (2 1/8")
32 12-8M0204649 WASHER, UPPER MOUNT COVER SCREW
33 11-35888 NUT, UPPER MOUNT COVER SCREW
34 12-31262 WASHER, UPPER MOUNT BOLT
35 12-47840 WASHER, RUBBER - UPPER MOUNT BOLT
36 12-31263 WASHER, UPPER MOUNT BOLT
37 11-8M0204653 NUT, UPPER MOUNT BOLT
38 31264 CAP, RUBBER - UPPER MOUNT BOLT
39 75300 MOUNT, RUBBER - LOWER (HEAVY DUTY)
40 10-75284 SCREW, LOWER MOUNT (5 1/2")
41 12-49339 WASHER, LOWER MOUNT SCREW
42 11-25096 NUT, LOWER MOUNT SCREW
43 25067 BUMPER, RUBBER - LOWER MOUNTING SCREW
44 11-8M0204653 NUT, GEAR HOUSING AND DRIVE SHAFT HOUSING STUDS
45 12-45176 WASHER, GEAR HOUSING TO DRIVE SHAFT HOUSING STUDS
46 11-29489 NUT, GEAR HOUSING AND DRIVE SHAFT HOUSING STUDS
47 12-45176 WASHER, GEAR HOUSING TO DRIVE SHAFT HOUSING STUDS
48 35608 CLAMP, LOWER MOUNT TO DRIVE SHAFT HOUSING
49 24-35522 SPRING, TENSION - LOWER MOUNT CLAMP
50 10-29256 SCREW, LOWER MOUNT CLAMP TO DRIVE SHAFT HOUSING
51 35474T COVER, LOWER MOUNT CLAMP
52 11-35521 NUT, LOWER MOUNT CLAMP COVER
53 10-29722 SCREW, COVER TO LOWER CLAMP MOUNT
▶FLYWHEEL ASSEMBLY AND STATOR (16 parts) FLYWHEEL ASSEMBLY AND STATOR
Ref OEM Part # Part Name
1 19-45907 PLUG8 FLYWHEEL PULLER THREADS
2 11-52901 NUT, FLYWHEEL (PART OF A436-31874A4 CRANKSHAFT ASSEMBLY)
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
11 398-4793 STATOR, ALTERNATOR
12 30050 TERMINAL, STATOR LEAD WIRE
13 10-57021 SCREW, STATOR TO UPPER END CAP (7/8")
14 54-26550 CLIP, STATOR/WIRING HARNESS LEADS FASTENING (5/16")
15 10-37655 SCREW, STATOR LEAD CLIP FASTENING (10-32 X 1/2")
16 8M0084613 "D" WASHER, CLIP FASTENING SCREW
▶FUEL PUMP AND FUEL LINE ASSEMBLY (36 parts) FUEL PUMP AND FUEL LINE ASSEMBLY
Ref OEM Part # Part Name
1 56677A6 FUEL PUMP ASSEMBLY - UPPER
2 21-30430A1 CHECK VALVE ASSEMBLY
3 23014A1 DIAPHRAGM KIT
7 23004 RETAINER, CHECK VALVE
8 10-43725 SCREW, RETAINER TO HOUSING
9 30461A2 FUEL PUMP ASSEMBLY - LOWER
10 30275 COVER, FUEL PUMP
11 10-73013 SCREW, FUEL PUMP MOUNTING (1 1/2") - UPPER PUMP
12 10-30273 SCREW, FUEL PUMP MOUNTING (1 7/8") - UPPER PUMP
13 10-73013 SCREW, FUEL PUMP MOUNTING (1 1/2") - LOWER PUMP
14 10-30273 SCREW, FUEL PUMP MOUNTING (1 7/8") - LOWER PUMP
15 32-32256A1 FUEL LINE ASSEMBLY, PUMP TO CARBURETOR (9 7/8")
16 22-30174 ELBOW, UPPER CARBURETOR STRAINER COVER (90)
17 22-30175 SLEEVE, CARBURETOR STRAINER COVER ELBOW
18 22-30177 NUT, UPPER CARBURETOR STRAINER COVER ELBOW
19 54-22627 CLIP, FUEL LINE TO CYLINDER BLOCK
20 10-62568 SCREW, FUEL LINE CLIP TO CYLINDER BLOCK (3/8")
21 8M0084613 "D" WASHER, FUEL LINE CLIP SCREW
22 32-31552A1 FUEL LINE ASSEMBLY, PUMP TO PUMP (12 3/8")
23 32-31553A1 FUEL LINE ASSEMBLY, PUMP TO CARBURETOR (19 3/4")
24 22-30174 ELBOW, LOWER FUEL PUMP INLET (90)
25 22-30175 SLEEVE, FUEL PUMP INLET ELBOW
26 22-30177 NUT, FUEL PUMP INLET ELBOW
27 32-30176 FUEL LINE, ADAPTOR TO LOWER FUEL PUMP (18")
28 22-37682 ELBOW, FUEL LINE TO ADAPTOR
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 10-69029 SCREW, ADAPTOR TO BOTTOM COWL (1 3/4")
35 10-37561 SCREW, ADAPTOR TO BOTTOM COWL (2 1/2")
36 11-8M0207775 NUT, ADAPTOR FASTENING SCREW
37 32-31584A1 FUEL LINE ASSEMBLY, MIDDLE CARB, TO BOTTOM CARB.
38 22-8M0123050 ELBOW, FUEL LINE TO CARBURETOR (45)
39 32-49454A1 FUEL LINE ASSEMBLY, TOP CARB. TO MIDDLE CARB.
▶GEAR HOUSING ASSEMBLY, COMPLETE (PAGE 1) (55 parts) GEAR HOUSING ASSEMBLY, COMPLETE (PAGE 1)
Ref OEM Part # Part Name
- 1623-3912A9 GEAR HOUSING ASSEMBLY, COMPLETE (LONG SHAFT) SEE NOTE BELOW
1 1623-5244A14 GEAR HOUSING ASSEMBLY
2 16-57921 STUD, GEAR HOUSING TO DRIVE SHAFT HOUSING (4")
3 16-8M0133358 STUD, GEAR HOUSING TO DRIVE SHAFT HOUSING (2 1/16")
4 16-8M0034463 STUD, WATER PUMP BASE AND BODY TO GEAR HOUSING (3 3/8")
5 16-57919 STUD, WATER PUMP BASE AND BODY TO GEAR HOUSING (3 5/16")
6 31-32898T BEARING, ROLLER - DRIVE SHAFT
7 45-47434 DRIVE SHAFT (LONG SHAFT)
8 43-49751 DEAR, PINION - DRIVE SHAFT
9 11-35921 NUT, PINION GEAR TO DRIVE SHAFT
10 15-30278A1 SHIM, WATER PUMP BASE TO GEAR HOUSING (.002-3-5-10)
11 30-63326T BEARING, BALL - DRIVE SHAFT (SERIAL #2653880 AND UP) Comment: SERIAL 02653880-09999999
12 53-30726 RING, RETAINING - BALL BEARING
13 27-32438 GASKET, WATER PUMP BASE TO GEAR HOUSING
14 25-8M0204651 "O" RING, WATER PUMP BASE
15 46-48747A1 WATER PUMP BASE ASSEMBLY (PLASTIC)
16 26-94038 OIL SEAL, WATER PUMP BASE
17 26-16977 OIL SEAL, WATER PUMP BASE
18 17-35973 DOWEL PIN, WATER PUMP BASE TO WATER PUMP BODY
19 27-8M0090319 GASKET, LOWER - WATER PUMP BASE TO FACE PLATE
20 8M0204677 PLATE, FACE - WATER PUMP BASE TO WATER PUMP BODY
21 27-858524 GASKET, UPPER - FACE PLATE TO WATER PUMP BODY
22 46-96148T1 WATER PUMP BODY ASSEMBLY (PLASTIC)
23 48752T INSERT, WATER PUMP BODY (PLASTIC)
24 26-16977 OIL SEAL, WATER PUMP BODY
25 26-38970 SEAL, RUBBER - WATER INLET TUBE
26 47-89984T4 IMPELLER - WATER PUMP
27 17-8M0214994 PIN, IMPELLER DRIVE
28 10-30720 SCREW, WATER PUMP BODY TO GEAR HOUSING (2 1/4")
29 13-26992 LOCKWASHER, WATER PUMP BODY SCREW
30 12-8M0204649 WASHER, WATER PUMP BODY FASTENING SCREW AND STUD
31 11-826709109 NUT, WATER PUMP FASTENING SCREW
32 12-36001 WASHER, WATER PUMP BODY FASTENING STUD
33 11-826709111 NUT, WATER PUMP BODY FASTENING STUD
34 25-8M0214918 RING, RUBBER - CENTRIFUGAL SLINGER (DRIVE SHAFT)
35 23-29804T SLEEVE, GUIDE - WATER INLET TUBE
36 25-8M0214919 "O" RING, UPPER - DRIVE SHAFT
37 37641001 SEAL, EXHAUST TUBE
38 38051 PLATE, SUPPORT - EXHAUST TUBE SEAL
39 76062A1 SHAFT, SHIFT - LOWER
40 53-29641 CLIP, RETAING - SHIFT SHAFT
41 25-25439 "O" RING, SHIFT SHAFT BUSING
42 23-77631A2 BUSHING ASSEMBLY, SHIFT SHAFT
43 26-892361 OIL SEAL, SHIFT SHAFT BUSHING (UPPER)
44 12-31266 WASHER, RUBBER - SHIFT SHAFT BUSHING
45 78036 SPACER, LOWER - REVERSE LOCKING
46 43308T1 CAM, REVERSE LOCKING
47 22-390721 PLUG, PIPE - SHIFT SHAFT GREASE FILLER HOLE
48 10-79953Q04 SCREW, GREASE FILLER AND VENT HOLE
49 12-191833 WASHER, GREASE FILLER AND VENT HOLE SCREW
50 10-29608 SCREW, GEAR HOUSING FLUSHING HOLE ALUMINUM
51 27-8M0214916 GASKET, GEAR HOUSING FLUSHING HOLE SCREW ALUMINUM
52 26-8M0214917 SEAL, GEAR HOUSING FLUSHING HOLE ALUMINUM
53 19-48750 PLUG, GEAR HOUSING FLUSHING HOLE PLASTIC
54 12-8M0204663 WASHER, GEAR HOUSING FLUSHING HOLE PLUG PLASTIC
▶GEAR HOUSING ASSEMBLY, COMPLETE (PAGE 2) (35 parts) GEAR HOUSING ASSEMBLY, COMPLETE (PAGE 2)
Ref OEM Part # Part Name
- 1623-3912A9 GEAR HOUSING ASSEMBLY, COMPLETE (LONG SHAFT) SEE NOTE BELOW
1 1623-5244A14 GEAR HOUSING ASSEMBLY SEE PAGE 30 FOR PARTS BREAKDOWN
55 760394 CAM, SHIFT Comment: SERIAL 02709828-09999999
56 30625 FOLLOWER, CAM
57 30624 SLIDE, CROSS PIN
58 24-30622 SPRING, COMPRESSION - CAM FOLLOWER
59 15-30923A1 SHIM, BEARING OUTER RACE TO GEAR HOUSING (.002-3-5-10)
60 31-30894A1 TAPERED ROLLER BEARING ASSEMBLY
61 31-30895T BEARING, ROLLER - FORWARD GEAR
62 43-53100A3 FORWARD GEAR ASSEMBLY
63 52-822539T RATCHET, SLIDING CLUTCH
64 17-8M0100263 PIN, CROSS - RATCHET TO PROPELLER SHAFT
65 24-30893 SPRING, RETAINING - CROSS PIN
66 44-93003 SHAFT, PROPELLER (FINE THREAD)
67 43-31887 REVERSE GEAR ASSEMBLY
68 15-29955A1 SHIM, THRUST WASHER TO GEAR HOUSING (.002-3-5-10)
69 12-71143A1 WASHER, THRUST - BEARING CARRIER TO GEAR HOUSING
70 30-31265 BEARING, BALL - REVERSE GEAR
71 25-29976 "O" RING, BEARING CARRIER
72 52132T1 BEARING CARRIER ASSEMBLY
73 31-30956T BEARING, ROLLER - BEARING CARRIER
74 26-8M0204670 OIL SEAL, BEARING CARRIER
75 28-30281 KEY, LOCATING - BEARING CARRIER
76 14-52700 TAB WASHER, GEAR HOUSING COVER
77 52699 COVER, GEAR HOUSING
78 97-31640Q4 TRIM TAB, GEAR HOUSING
79 10-32470 SCREW, TRIM TAB TO GEAR HOUSING (1 3/4")
80 12-45176 WASHER, GEAR HOUSING TO DRIVE SHAFT HOUSING STUDS
81 11-8M0204653 NUT, GEAR HOUSING TO DRIVE SHAFT HOUSING STUDS
82 10-34353 SCREW, GEAR HOUSING TO DRIVE SHAFT HOUSING (1")
83 65091Q01 THRUST HUB AND WASHER ASSEMBLY PART OF A-1623-3486A8 AND A9 Comment: PART OF A-1623-3486A8 AND A9 GEAR HSG ASS'Y COMPLETE
84 12-29590 WASHER, CUPPED - THRUST HUB Comment: PART OF A-1623-3486A8 AND A9 GEAR HSG ASS'Y COMPLETE
85 12-31211Q03 WASHER, SPLINED - PROPELLER NUT
86 14-816629Q TAB WASHER, PROPELLER NUT
87 11-52707Q1 NUT, PROPELLER (FINE THREAD) ---- PART OF A1623-3486A8 AND A
▶MISCELLANEOUS PARTS/ACCESSORIES (1 parts) MISCELLANEOUS PARTS/ACCESSORIES
Ref OEM Part # Part Name
- 79-73370A3 TACHOMETER ASSEMBLY
▶OVERSIZE PISTONS AND RINGS (1 parts) OVERSIZE PISTONS AND RINGS
Ref OEM Part # Part Name
-- 39-78811A12 RING, PISTON (.015 OVERSIZE) - 1/16" THICK
▶STARTER MOTOR, STARTER SOLENOID, RECTIFIER AND WIRING HARNES (55 parts) STARTER MOTOR, STARTER SOLENOID, RECTIFIER AND WIRING HARNES
Ref OEM Part # Part Name
1 84-69236A1 WIRING HARNESS, INTERNAL
2 30050 TERMINAL, HARNESS AND MERCURY SWITCH LEADS
3 26079A2 PLATE, WIRING HARNESS TO BOTTOM COWL
4 10-45893 SCREW, HARNESS PLATE FASTENING
5 54-76368 CLAMP, WIRING HARNESS TO BOTTOM COWL
6 10-45862 SCREW, WIRING HARNESS CLAMP TO BOTTOM COWL (7/8")
7 13-26996 LOCKWASHER, WIRING HARNESS CLAMP SCREW
8 12-847883 WASHER, WIRING HARNESS CLAMP SCREW
9 24-28975 SPRING, GARTER - INTERNAL WIRING HARNESS
10 10-98256 SCREW, GROUND WIRE TO BOTTOM COWL
11 13-25244 LOCKWASHER, GROUND WIRE SCREW
12 13-24669 LOCKWASHER, GROUND WIRE SCREW
13 25-26547 GROMMET, RECTIFIER TO SWITCH BOX WIRE
14 54-648552 CLIP, WIRING HARNESS TO FRONT BRACKET (1/8")
15 10-8M0113176 SCREW, WIRING HARNESS TO FRONT BRACKET (3/8")
16 8M0084613 "D" WASHER, WIRING HARNESS CLIP SCREW
17 45559 TERMINAL BLOCK, STATOR LEADS
18 10-48409 SCREW, TERMINAL BLOCK FASTENING (5/8")
19 10-62568 SCREW, STATOR LEADS TO TERMINAL BLOCK (3/8")
20 332-2986A21 SWITCH BOX ASSEMBLY
21 12-45075 WASHER, SWITCH BOX TERMINAL
22 11-45076 NUT, SWITCH BOX TERMINAL
23 10-45218 SCREW, SWITCH BOX (3/8")
24 10-64279 SCREW, SWITCH BOX TO FRONT MOUNTING BRACKET (1")
25 11-8M0207775 NUT, SWITCH BOX SCREW
26 84-93389A12 CABLE, WIRE - STARTER MOTOR TO FRONT SUPPORT BRACKET
27 10-69035 SCREW, WIRE CABLE TO STARTER MOTOR
28 50-48643A1 STARTER MOTOR ASSEMBLY
29 10-73657 SCREW, STARTER MOTOR CRANKCASE FLANGE (1 1/2")
30 10-31984 SCREW, STARTER MOTOR CRANKCASE FLANGE (1 3/8")
31 13-8M0204647 LOCKWASHER, STARTER MOTOR SCREW
32 53507 BRACKET, STARTER MOTOR SUPPORT
33 10-25299 SCREW, STARTER MOTOR TO SUPPORT BRACKET (3/4")
34 13-8M0204647 LOCKWASHER, STARTER MOTOR SCREW
35 12-26825 WASHER, STARTER MOTOR SCREW
36 10-32293 SCREW, SUPPORT BRACKET TO CYLINDER BLOCK (1 3/4")
37 12-26825 WASHER, SUPPORT BRACKET SCREW
38 11-29250 NUT, SUPPORT BRACKET SCREW
39 13-26992 LOCKWASHER, STARTER MOTOR TERMINAL
40 11-20890 NUT, STARTER MOTOR TERMINAL
41 25661T1 SOLENOID, STARTER (NOT AS SHOWN)
42 10-69028 SCREW, SOLENOID TO COIL BRACKET (3/4")
43 13-26992 LOCKWASHER, STARTER SOLENOID FASTENING SCREW
44 269011 BUMPER, RUBBER - STARTER SOLENOID
45 10,13-26996 LOCKWASHER, SOLENOID TERMINAL
46 10,11-68219 NUT, SOLENOID TERMINAL
47 48396 CABLE, WIRE - STARTER MOTOR TO SOLENOID
48 13-8M0204647 LOCKWASHER, SOLENOID TERMINAL (5/16")
49 11-22053 NUT, SOLENOID TERMINAL (5/16")
50 46265 BOOT, SOLENOID TERMINAL
51 78614A1 RECTIFIER ASSEMBLY
52 10-64278 SCREW, RECTIFIER TO MOUNTING BRACKET (1")
53 11-8M0207775 NUT, RECTIFIER MOUNTING SCREW
54 12-45075 WASHER, RECTIFIER STATOR LEAD TERMINAL
55 11-45076 NUT, FASTENING - RECTIFIER STATOR LEADS
▶TOP COWL AND SUPPORT BRACKETS (47 parts) TOP COWL AND SUPPORT BRACKETS
Ref OEM Part # Part Name
1 2114-3806 COWL, TOP
2 52733A9 RETAINER ASSEMBLY, TOP COWL
3 35496 PAD, BUMPER _ TOP COWL RETAINER
4 37-61018A1 EMBLEM, TOP COWL RETAINER
5 10-74824 SCREW, RETAINER TO TOP COWL (1 1/4")
6 13-39107 LOCKWASHER, RETAINER TO TOP COWL SCREW
7 76370 SHIELD, SHIELD TO TOP COWL (5/8")
8 13-37371 LOCKWASHER, SHIELD SCREW
10 47341A11 ROPE, STARTER (FOR MANUAL STARTING ONLY)
11 46144 BRACKET, COWL LATCH TOP COWL FASTENING
12 10-21091 SCREW, COWL LATCH BRACKET TO TOP COWL (1 1/8")
13 12-37998 WASHER, LATCH BRACKET SCREW (1/16" THICK)
14 12-37998 WASHER, LATCH BRACKET SCREW (1/32" THICK)
15 37412 LEVER, CLAMPING - TO COWL MOUNTING
16 23-26819 BUSHING, NYLON - CLAMPING LEVER
17 12-38006 WASHER, CLAMPING LEVER
18 23-31293 BUSHING, RUBBER - CLAMPING LEVER
19 11-30428 FASTNER, CLAMPING LEVER
20 17-29077 PIN, ROLL - CLAMPING LEVER
21 52739 HINGE, COWL LATCH - TOP COWL
22 94918F1 LEVER, COWL LATCH HINGE
23 17-58998 PIN, ROLL - COWL LATCH LEVER TO HINGE
24 24-53019 SPRING, COWL LATCH HINGE
25 55455 HOOK, TOP COWL LATCH - REAR
26 10-22956 SCREW, REAR HOOK TO TOP COWL (7/8")
27 13-26992 LOCKWASHER, REAR HOOK MOUNTING SCREW
28 79897A4 FRAME, TOP COWL SUPPORT
29 37-45201 DECAL, TIMING
30 46096 MOUNT, RUBBER - TOP COWL FRAME (HEAVY DUTY)
31 11-8267089 NUT, RUBBER MOUNT TO TOP COWL FRAME
32 54685 BRACKET, TOP COWL SUPPORT - REAR
33 31014 MOUNT, RUBBER - REAR SUPPORT BRACKET
34 13-26992 LOCKWASHER, RUBBER MOUNT TO REAR SUPPORT BRACKET
35 12-69057 WASHER, RUBBER MOUNT TO REAR SUPPORT BRACKET
36 11-20088 NUT, RUBBER MOUNT TO REAR SUPPORT BRACKET
37 10-26065 SCREW, REAR BRACKET TO TOP COWL FRAME (1")
38 11-29250 NUT, REAR BRACKET SCREW
39 10-35386 SCREW, REAR BRACKET TO BOTTOM COWL (1")
40 13-8M0204647 LOCKWASHER, REAR SUPPORT BRACKET SCREW
41 77116A1 BRACKET ASSEMBLY, TOP COWL SUPPORT - FRONT
42 10-78841 SCREW, FRONT BRACKET TO BOTTOM COWL (1 1/2")
43 11-29250 NUT, FRONT SUPPORT BRACKET SCREW
44 10-73657 SCREW, FRONT BRACKET TO TOP COWL FRAME (1 1/2")
45 13-8M0204647 LOCKWASHER, FRONT SUPPORT BRACKET SCREW
46 37640 MOUNT, RUBBER - FRONT SUPPORT BRACKET
47 13-8M0204647 LOCKWASHER, RUBBER MOUNT TO FRONT SUPPORT BRACKET
48 11-22053 NUT, RUBBER MOUNT TO FRONT SUPPORT BRACKET

100-Hour / Annual Service Checklist

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

  1. Replace water pump impeller and inspect wear plate
  2. Change engine oil and oil filter (check drain plug washer)
  3. Replace spark plugs and check ignition timing
  4. Drain and refill lower unit gear oil; inspect for water contamination
  5. Inspect fuel lines, primer bulb, and fuel filter for deterioration
  6. Check and replace sacrificial anodes (zinc or aluminum)
  7. Inspect propeller for damage; check shaft seal and cotter pin
  8. Check valve clearance (refer to service manual for specifications)
  9. Lubricate all grease points (steering, tilt tube, shift linkage)
  10. Inspect control cables and throttle/shift linkage for smooth operation
  • Pro Tip: Always flush the engine with fresh water after saltwater use — even a quick 10-minute flush significantly extends component life.
  • Pro Tip: Use fuel stabilizer in the tank before winter storage, and fog the cylinders to prevent internal corrosion during extended periods of non-use.

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