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Mercury 300 350 (1271884 THRU 1448139) Parts & Diagrams
🔎 Mercury 300 350 Reference Library — Exploded parts diagrams (17 diagrams), specifications, common issues, and maintenance checklist.
The Mercury 300 350 is a 4-Stroke, V8 64-degree, DOHC, 32-valve outboard motor. Designed for large center-consoles, offshore sport-fishing boats, and multi-engine configurations.
Quick Reference Specifications
| Specification | Value |
|---|---|
| Engine Type | 4-Stroke, V8 64-degree, DOHC, 32-valve |
| Horsepower | 300 HP |
| Displacement | 4600 cc (4.6L / 279 CID) |
| Bore x Stroke | 92 mm x 86 mm (3.62 in. x 3.38 in.) |
| Spark Plug (Type & Gap) | NGK LKAR7C-9 |
| Engine Oil Capacity | 7.0 L (7.4 qt) |
| Recommended Engine Oil | Mercury FourStroke Oil 25W-40 |
| Gear Case Oil Capacity | 970 mL (32.8 oz) |
| Idle Speed (in gear) | 600 RPM |
| Full Throttle RPM Range | 5200-6000 |
| 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 300 350:
- 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 300 350.
▶BOTTOM COWL ASSEMBLY (47 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| - | 37-23076 | DECAL, MERCELECTRIC - BOTTOM COWL |
| -- | 13-20554 | LOCKWASHER, ANCHOR BRACKET SCREW |
| 1 | 103-1544A1 | BOTTOM COWL ASSEMBLY |
| 2 | 21041 | INSERT, TAP LOCK |
| 3 | 29206 | PLUG, BOTTOM COWL HARNESS HOLE |
| 4 | 10-45893 | SCREW, PLUG TO BOTTOM COWL |
| 5 | 13-26995 | LOCKWASHER, PLUG FASTENING SCREW |
| 6 | 11-26419 | NUT, PLUG FASTENING SCREW |
| 7 | 23760 | BAFFLE, BOTTOM COWL |
| 8 | 10-21106 | SCREW, BAFFLE TO BOTTOM COWL |
| 9 | 21104A2 | CONNECTOR BASE ASSEMBLY |
| 10 | 13-21972 | LOCKWSHER, CONNECOTR BASE |
| 11 | 11-21971 | NUT, CONNECTOR BASE FASTENING |
| 12 | 54-25231 | CLIP, CONNECTOR BASE LEAD WIRE |
| 13 | 10-21106 | SCREW, LEAD WIRE CLIP TO BOTTOM COWL |
| 14 | 29532 | BRACKET, MAGNETO CONTROL (LOWER) |
| 15 | 30612 | LEVER, SHIFT CONTROL |
| 16 | 23-29529 | SLEEVE, MAGNETO BRACKET AND SHIFT LEVER |
| 17 | 10-37612 | SCREW, BRACKET AND LEVER FASTENING |
| 18 | 12-8M0042641 | WASHER, BRACKET AND LEVER FASTENING SCREW |
| 19 | 17-30978A1 | PIN ASSEMBLY, CLEVIS YOKE |
| 20 | 17-239281 | ROLL PIN, CLEVIS YOKE PIN |
| 21 | 10-20584 | SCREW, CLEVIS PIN FASTENING |
| 22 | 13-29402 | WASHER, WAVE - IN FASTENING SCREW |
| 23 | 11-8M0204718 | NUT, PIN FASTENING SCREW |
| 24 | 25163 | SHAFT, SHIFT (UPPER) - LONG SHAFT |
| 25 | 27714 | ROD (SLEEVE), SHIFT CONTROL END |
| 26 | 11-25168 | NUT, SHIFT SHAFT END ADJUSTING |
| 27 | 25134 | ROD, LINK - SHIFT SHAFT END |
| 28 | 18-210711 | COTTER PIN, LINK ROD TO SHIFT SHAFT |
| 29 | 12-20583 | WASHER, LINK ROD |
| 30 | 24-25065 | SPRING, DETENT |
| 31 | 10-98256 | SCREW, DETENT SPRING TO BOTTOM COWL |
| 32 | 12-69057 | WASHER, DETENT SPRING SCREW |
| 33 | 11-8M0207775 | NUT, DETENT SPRING SCREW |
| 34 | 20557 | BRACKET, CABLE END ANCHOR |
| 35 | 10-29200 | SCREW, ANCHOR BRACKET TO BOTTOM COWL |
| 36 | 22-996642 | ELBOW, PLASTIC - MAGNETO VENT TUBE |
| 37 | 32-8M0108355 | TUBE, VENT - MAGNETO |
| 38 | 27-20390 | GASKET, POWERHEAD TO BOTTOM COWL |
| 39 | 30109 | GROUND STRAP ASSEMBLY, CYLINDER BLOCK TO COWL |
| 40 | 38-27720 | PLATE, TRADE MARK - BOTTOM COWL |
| 41 | 53-25539 | FASTENER, PLATE TO BOTTOM COWL |
| 42 | 26552 | SUPPORT, EXTERNAL WIRING HARNESS |
| 43 | 10-20639 | SCREW, HARNESS SUPPORT TO BOTTOM COWL |
| 44 | 12-20084 | WASHER, HARNESS SUPPORT FASTENING SCREW |
| 45 | 11-29250 | NUT, HARNESS SUPPORT SCREW |
▶CARBURETOR ASSEMBLY (38 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| -- | 10-22928 | SCREW, KNOB FASTENING |
| 1 | 1334-1701 | CARBURETOR ASSEMBLY, COMPLETE (KB-2A) Comment: SERIAL 01324411-09999999 |
| 2 | 1395-8673 | FLOAT ASSEMBLY |
| 3 | 17-20853 | PIN, FLOAT LEVER PINION |
| 4 | 1399-102 | LEVER, FLOAT (LOWER) |
| 5 | 1399-101 | LEVER, FLOAT (UPPER) |
| 6 | 1395-92581 | INLET NEEDLE, SEAT AND GASKET |
| 7 | 27-25033 | GASKET, INLET SEAT |
| 8 | 1395-6027 | SCREW, THROTTLE STOP LEVER |
| 9 | 8146791 | LEVER, THROTTLE STOP (SEE NOTE BELOW) |
| 10 | 1399-1716 | SHAFT, THROTTLE |
| 11 | 24-26890 | SPRING, THROTTLE SHAFT RETURN (LOWER CARBURETOR) |
| 12 | 1399-1649 | JET, MAIN FUEL (.049) |
| 13 | 27-28409 | GASKET, MAIN FUEL JET |
| 14 | 24-27160 | SPRING, IDLE ADJUSTMENT SCREW |
| 15 | 1399-1713 | SCRW, IDLE ADJUSTMENT |
| 16 | 1399-99 | GASKET, FLOAT BOWL COVER |
| 17 | 1399-1133 | COVER, FLOAT BOWL |
| 18 | 1399-3938 | SCREEN, FILTER-NOT AS SHOWN |
| 19 | 10-22625 | SCREW, FLOAT BOWL COVER (SHORT) |
| 20 | 10-25850 | SCREW, FLOAT BOWL COVER (LONG) |
| 21 | 27-25851 | GASKET, STRAINER COVER (LARGE) |
| 22 | 27-25849 | GASKET, STRAINER COVER (SMALL) |
| 23 | 1399-1135 | COVER, STRAINER |
| 24 | 27-25848 | GASKET, STRAINER COVER SCREW |
| 25 | 10-25822 | SCREW, STRAINER COVER FASTENING |
| 26 | 1399-1715 | NOZZLE, MAIN |
| 27 | 10-23178 | SCREW, PLUG-MAIN NOZZLE |
| 28 | 10-23035 | SCREW AND LOCKWASHER, THROTTLE SHUTTER |
| 29 | 1399-107 | SHUTTER, THROTTLE |
| 30 | 1399-1714 | TUBE, IDLE |
| 31 | 27-23180 | GASKET, IDLE TUBE |
| 32 | 10-28845 | SCREW, PLUG-BODY CHANNEL |
| 33 | 19-20011 | WELCH PLUG, BODY CHANNEL |
| 34 | 10-28405 | SCREW, PLUG-MAIN FUEL JET CHANNEL |
| 35 | 27-28406 | GASKET, BODY CHANNEL PLUG SCREW |
| 36 | 27-20183 | GASKET, CARBURETOR FLANGE |
| 37 | 11-24652 | NUT, CARBURETOR MOUNTING STUD |
▶CARBURETOR LINKAGE AND CHOKE SOLENOID (43 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| -- | 12-20192 | WASHER, CHOKE ROD SPRING SCREW |
| 1 | 28936 | CHOKE SOLENOID, TOP COWL |
| 2 | 22647 | DISCONNECT, KNIFE SPLICE - CHOKE SOLENOID |
| 3 | 10-20540 | SCREW, CHOKE SOLENOID TO TOP COWL |
| 4 | 13-26992 | LOCKWASHER, CHOKE SOLENOID SCREW |
| 5 | 10-24773 | SCREW, CHOKE SOLENOID TO TOP COWL |
| 6 | 13-26991 | LOCKWASHER, CHOKE SOLENOID SCREW |
| 7 | 26716A1 | GROUND STRAP ASSEMBLY, CHOKE SOLENOID TO ADAPTOR |
| 8 | 32-61115 | SLEEVE, CHOKE SOLENOID WIRE AND HARNESS WIRE |
| 9 | 54-24836 | CLAMP, CHOKE WIRE TO STARTER SOLENOID |
| 10 | 27031A1 | PLUNGER ASSEMBLY, CHOKE SOLENOID |
| 11 | 27126 | ADAPTOR PLATE, CHOKE PLUNGER |
| 12 | 25-26633 | GROMMET, ADAPTOR PLATE |
| 13 | 10-21281 | SCREW, ADAPTOR PLATE TO CHOKE ROD BRACKET |
| 14 | 13-26994 | LOCKWASHER, ADAPTOR PLATE FASTENING SCREW |
| 15 | 12-26014 | WASHER, CHOKE SOLENOID LINK |
| 16 | 18-26953 | COTTER PIN, CHOKE SOLENOID LINK FASTENING |
| 17 | 1334-1701 | CARBURETOR ASSEMBLY, COMPLETE Comment: SERIAL 01324411-09999999 |
| 18 | 27917 | CLUSTER, THROTTLE LEVER (UPPER CARBURETOR) Comment: SERIAL 01324411-09999999 |
| 19 | 1395-6027 | SCREW, SET - CLUSTER TO THROTTLE LEVER |
| 20 | 10-20176 | SCREW, CHOKE LEVER PIVOT PIN |
| 21 | 30014 | SHUTTER, CHOKE Comment: SERIAL 01324411-09999999 |
| 22 | 24-26067 | SPRING, CHOKE SHUTTER |
| 23 | 26645A1 | CHOKE LEVER ASSEMBLY (UPPER CARBURETOR) |
| 24 | 23-26888 | BUSHING, CHOKE LEVER |
| 25 | 18-210711 | COTTPER PIN, CHOKE LEVER RETAINING |
| 26 | 27870 | CLAMP, THROTTLE PICKUP BRACKET |
| 27 | 10-69022 | SCREW, CLAMP TO THROTTLE PICKUP BRACKET |
| 28 | 28007A3 | BRACKET, THROTTLE PICKUP Comment: SERIAL 01324411-09999999 |
| 29 | 10-29239 | SCREW, THROTTLE BRACKET MOUNTING |
| 30 | 12-20192 | WASHER, THROTTLE BRACKET SCREW |
| 31 | 10-20650 | SCREW, CHOKE ROD SPRING MOUNTING |
| 32 | 24-26068 | SPRING, CHOKE ROD TO RETAINER |
| 33 | 27711 | RETAINER, CHOKE ROD SPRING |
| 34 | 10-28713 | SCREW, RETAINER TO LOWER CARBURETOR |
| 35 | 90242A1 | KNOB, CHOKE ROD |
| 36 | 25-20116 | GROMMET, CHOKE ROD |
| 37 | 22462 | "U" LINK, CHOKE KNOB TO CHOKE ROD |
| 38 | 10-69022 | SCREW, "U" LINK TO CHOKE KNOB |
| 39 | 13-26996 | LOCKWASHER, "U" LINK FASTENING SCREW |
| 40 | 18-210711 | COTTPER PIN, CHOKE LEVER AND ROD FASTENING |
| 41 | 28978 | CHOKE ROD |
| 42 | 17-25391 | RIVET, CHOKE ROD TO CHOKE LEVER |
▶CLAMP AND SWIVEL BRACKET (40 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| - | 54-25735 | CLIP, SAFETY CHAIN (NO LONGER USED ON LATER ENGINES) |
| -- | 12-27964 | WSHER, SWIVEL PIN TO BOTTOM YOKE (.018) |
| 1 | 1440-1464A1 | CLAMP BRACKET ASSEMBLEY (LONG SHAFT) |
| 2 | 28403A3 | THUMB SCREW ASSEMBLY (LONG SHAFT) |
| 3 | 12-28404 | WASHER, THUMB SCREW (LONG SHAFT) |
| 4 | 28122 | TUBE, TILT - CLAMP BRACKET TO SWIVEL BRACKET |
| 5 | 15-25600 | SHIM, CLAMP BRACKET TO SWIVEL BRACKET (.010) |
| 6 | 11-8M2014641 | NUT, TILT TUBE |
| 7 | 25606 | CAP, PLASTIC - TILT TUBE |
| 8 | 16-59625 | STUD, CLAMP BRACKET |
| 9 | 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 | 26903A3 | REVERSE LOCK ASSEMBLY (LONG SHAFT) |
| 14 | 18-45882 | COTTER PIN, REVERSE LOCK TO SHAFT |
| 15 | 24-29821 | SPRING, REVERSE LOCK TENSION |
| 16 | 17-25598 | ROLL PIN, REVERSE LOCK SPRING ATTACHING |
| 17 | 56349 | SHAFT, REVERSE LOCK TO SWIVEL BRACKET |
| 18 | 1442-1400A1 | SWIVEL BRACKET ASSEMBLY (LONG SHAFT) |
| 19 | 22-69059 | FITTING, GREASE - SWIVEL BRACKET |
| 20 | 26-32911 | OIL SEAL, SWIVEL BRACKET |
| 21 | 19-77633Q | LUBRICAP, SWIVEL BRACKET GREASE FITTING |
| 22 | 29057 | LEVER, TILT STOP - PORT SIDE (LONG SHAFT) |
| 23 | 10-27791 | SCREW, ANCHOR - TILT STOP LEVER (LONG SHAFT |
| 24 | 23-29055 | SPACER, TILT STOP LEVER (LONG SHAFT) |
| 25 | 10-27790 | SCREW, RETAINING - TILT STOP LEVER (LONG SHAFT) |
| 26 | 15-20473 | SHIM, RETAINING SCREW - PORT SIDE |
| 27 | 13-20846 | WASHER, WAVE - RETAINING SCREW - PORT SIDE |
| 28 | 11-24652 | NUT, ANCHOR AND RETAINING SCREW (.060) |
| 29 | 12-25176 | WASHER, SWIVEL PIN TO BOTTOM YOKE |
| 30 | 30462A1 | BOTTOM YOKE ASSEMBLY (LONG SHAFT) |
| 31 | 17-28419A4 | SWIVEL PIN AND TOP YOKE ASSEMBLY (LONG SHAFT) |
| 32 | 11-71956 | NUT, SWIVEL PIN (LONG SHAFT) - NOT AS SHOWN |
| 33 | 30711 | BUMPER, TOP YOKE |
| 34 | 38-31056 | SERIAL PLATE |
| 35 | 10-25612 | SCREW, DRIVE - SERIAL PLATE TO SWIVEL BRACKET |
| 36 | 10-68298 | BOLT, CARRIAGE - CLAMP BRACKET TO BOAT TRANSOM (LONG SHAFT) |
| 37 | 12-68410 | WASHER, CARRIAGE BOLT (LONG SHAFT) |
| 38 | 11-82670912 | NUT, CARRIAGE BOLT (LONG SHAFT) |
▶COWLING AND FRONT COVER (18 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| -- | 92-271091 | ADHESIVE COMPOUND (3 1/2 OUNCE KIT) EMBLEM FASTENING |
| 1 | 2104-2654A5 | COWL FRONT COVER ASSEMBLY |
| 2 | 26183A5 | EMBLEM, FRONT COVER (SEE NOTE BELOW) |
| 3 | 10-29552 | SCREW, COVER FASTENING |
| 4 | 12-26162 | WASHER, COVER FASTENING SCREW |
| 5 | 12-27897 | WASHER, COVER FASTENING SCREW |
| 6 | 20721 | BUMPER, RUBBER-FRONT COVER (SMALL) |
| 7 | 269011 | BUMPER, RUBBER-FRONT COVER (LARGE) |
| 8 | 28999 | BLANKET, SOUND ABSORBING-FRONT COVER |
| 9 | 12-29000 | WASHER, BLANKET TO FRONT COVER |
| 10 | 11-28968 | NUT, SPEED-SOUND BLANKET FASTENING |
| 11 | 190-1819A2 | WRAP AROUND COWL ASSEMBLY |
| 12 | 21060 | HANDLE, COWL LATCH |
| 13 | 53-21058 | "E" RING, COWL LATCH HINGE PIN |
| 14 | 17-21057 | PIN, HINGE-COWL LATCH HANDLE |
| 15 | 25690 | SWIVEL, COWL LATCH |
| 16 | 25691 | HOOK, COWL LATCH FASTENING |
| 17 | 24825 | BLANKET, WRAP AROUND COWL |
▶CRANKSHAFT, PISTON AND CONNECTING ROD (24 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| - | 11-24652 | NUT, MAIN BEARING CLAMPING SCREW Comment: ALUMINUM |
| -- | 39-20992A12 | RING, PISTON (.015 OVERSIZE) |
| 1 | 400-2976A2 | CRANKSHAFT |
| 2 | 25-29619 | "O"RING, DRIVE SHAFT SPLINE |
| 3 | 500-5345A4 | CENTER MAIN BEARING ASSEMBLY |
| 4 | 10-28666 | SCREW, CENTER MAIN BEARING CLAMPING |
| 5 | 29-20046T | BEARING, NEEDLE |
| 6 | 20047 | RACE, OUTER |
| 7 | 53-20048 | RING, SNAP - OUTER RACE CLAMPING |
| 8 | 527-1619A4 | MAIN BEARING ASSEMBLY (VALVE TYPE) Comment: ALUMINUM |
| 9 | 10-26184 | SCREW, MAIN BEARING CLAMPING Comment: ALUMINUM |
| 10 | 34-88498A1 | REED SET, MATCHED - MAIN BEARING Comment: ALUMINUM |
| 11 | 34-20053 | REED STOP, MAIN BEARING REED VALVES Comment: ALUMINUM |
| 12 | 12-26014 | WASHER, REED STOP MOUNTING SCREW Comment: BRONZE - NO LONGER AVAILABLE, ORDER A-527-1619A1 |
| 13 | 10-77280 | SCREW, REED STOP MOUNTING Comment: ALUMINUM |
| 14 | 726-1611A2 | PISTON AND PISTON PIN ASSEMBLY |
| 15 | 40-20057 | LOCK RING, PISTON PIN |
| 16 | 39-20058 | RING, PISTON |
| 17 | 600-2748A3 | CONNECTING ROD AND CAP ASSEMBLY (SEE NOTE BELOW) |
| 18 | 10-45379 | SCREW, CONNECTING ROD |
| 19 | 11-20061 | NUT, CONNECTING ROD SCREW |
| 20 | 29-20046T | BEARING, NEEDLE - CRANKPIN |
| 21 | 29-20063 | BEARING, NEEDLE - PISTON PIN |
| 22 | 12-20064 | WASHER, NEEDLE LOCATING |
▶CYLINDER BLOCK AND CRANKCASE ASSEMBLY (46 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| - | 17-20032 | DOWEL PIN, CYLINDER BLOCK TO MAIN BEARING |
| -- | 12-20028 | WASHER, TRANSFER PORT COVER FASTENING SCREW |
| 1 | 808-1321A4 | CYLINDER BLOCK AND CRANKCASE ASSEMBLY |
| 2 | 23-26348 | BUSHING, CRANKCASE |
| 3 | 22-996642 | STUD, CARBURETOR MOUNTING (1-1/4") |
| 4 | 17-43044 | DOWEL PIN, CRANKCASE TO CYLINDER BLOCK |
| 5 | 16-33111 | STUD, CRANKCASE TO DRIVE SHAFT HOUSING (1-9/16") |
| 6 | 16-8M0034463 | STUD, CYLINDER BLOCK TO DRIVE SHAFT HOUSING (3-3/8") |
| 7 | 16-29989 | STUD, SYLINDER BLOCK TO DRIVE SHAFT HOUSING (1-7/8") |
| 8 | 22-328022 | PLUG, PIPE - WATER PRESSURE HOLE (SEE NOTE BELOW) |
| 9 | 10-22039 | SCREW, CRANKCASE TO CYLINDER BLOCK (2-3/4") |
| 10 | 10-78841 | SCREW, CRANKCASE TO CYLINDR BLOCK (1-1/2") |
| 11 | 11-29250 | NUT, CRANKCASE FASTENING SCREW |
| 12 | 10-98260 | SCREW, MAIN BEARING LOCKING Comment: SERIAL 01352948-09999999 |
| 13 | 14-20091 | TAB WASHER, BEARING LOCKING SCREW |
| 14 | 10-20359 | SCREW, CENTER MAIN BEARING LOCKING |
| 15 | 1100-339A1 | END CAP ASSEMBLY, UPPER |
| 16 | 30-63742T | BEARING, BALL - UPPER END CAP |
| 17 | 25-20081 | "O" RING, UPPER END CAP |
| 18 | 26-41953 | OIL SEAL |
| 19 | 15-20082A1 | SHIM, UPPER END CAP TO CRANKCASE |
| 20 | 10-29198 | SCREW, UPPER END CAP MOUNTING |
| 21 | 1102-4181A3 | END CAP ASSEMBLY, LOWER |
| 22 | 30-63742T | BEARING, BALL - LOWER END CAP |
| 23 | 25-20081 | "O" RING, LOWER END CAP |
| 24 | 26-29477 | OIL SEAL, LOWER |
| 25 | 15-20085A1 | SHIM, LOWER END CAP TO CRANKCASE |
| 26 | 10-29198 | SCREW, LOWER END CAP MOUNTING |
| 27 | 27-26923 | GASKET, MANIFOLD PLATE TO COVER |
| 28 | 26922 | PLATE, EHAUST MANIFOLD |
| 29 | 28240 | COVER, EXHAUST MANIFOLD |
| 30 | 10-28666 | SCREW, MANIFOLD COVER AND HIGH TENSION LEAD CLIP MOUNTING |
| 31 | 12-20028 | WASHER, MANIFOLD COVER AND HIGH TENSION LEAD CLIP SCREWS |
| 32 | 1000-1A1 | CYLINDER BLOCK COVER ASSEMBLY (SEE NOTE BELOW) |
| 33 | 23-26348 | BUSHING, CYLINDER BLCOK COVER |
| 34 | 27-22333 | GASKET, CYLINDER BLOCK COVER |
| 35 | 10-20653 | SCREW, CYLINDER BLOCK COVER MOUNTING |
| 36 | 11-24652 | NUT, COVER MOUNTING SCREW |
| 37 | 27-279361 | GASKET, TRANSFER PORT COVER |
| 38 | 27935 | COVER, TRANSFER PORT |
| 39 | 10-20540 | SCREW, TRANSFER PORT COVER FASTENING |
| 40 | 22-62365A1 | CHECK VALVE ASSEMBLY, BLEED HOSE (UPPER) |
| 41 | 21-28481A1 | CHECK VALVE ASSEMBLY, BLEED HOSE |
| 42 | 32-9912688 | HOSE, CYLINDER BLEED (6-1/2") |
| 43 | 22-67902 | CONNECTOR, CYLINDER BLEED HOSE (LOWER) |
| 44 | 54-20387 | CLAMP, BLEED HOSE TO CHECK VALVE AND CONNECTOR |
▶DRIVE SHAFT HOUSING ASSEMBLY (42 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| -- | 12-20084 | WASHER, LOWER MOUNT COVER SCREW |
| 1 | 1535-1566 | DRIVE SHAFT HOUSING (USE WITH 7/16" STUD) - LONG SHAFT Comment: SERIAL 01260217-09999999 |
| 2 | 32-25076 | TUBE, WATER INLET (LONG SHAFT) |
| 3 | 25-24961 | RING, RUBBER - WATER INLET TUBE |
| 4 | 26-25192 | SEAL, WATER INLET TUBE |
| 5 | 23-23651 | SLEEVE, WATER INLET TUBE |
| 6 | 27898 | BAFFLE, EXHAUST RELIEF (LONG SHAFT) |
| 7 | 10-25255 | SCREW, BAFFLE TO DRIVE SHAFT HOUSING |
| 8 | 27-24899 | GASKET, DRIVE SHAFT HOUSING TO BOTTOM COWL |
| 9 | 32445A1 | NUT, POWERHEAD STUDS |
| 10 | 10-25093 | SCREW, GEAR HOUSING TO DRIVE SHAFT HOUSING |
| 11 | 16-29103 | STUD, DRIVE SHAFT HOUSING TO GEAR HOUSING (7/16") |
| 12 | 11-8M0204653 | NUT, GEAR HOUSING AND DRIVE SHAFT HOUSING STUDS (7/16") |
| 13 | 28593 | ROD, PUSH - REVERSE LOCK (LONG SHAFT) |
| 14 | 17-24887 | PIN, REVERSE LOCK LEVER |
| 15 | 18-25191 | COTTER PIN, PUSH ROD |
| 16 | 24-25122 | SPRING, TENSION - PUSH ROD |
| 17 | 52920 | LEVER, REVERSE LOCK |
| 18 | 24926A1 | UPPER MOUNT ASSEMBLY, UPPER |
| 19 | 79680A1 | COVER, UPPER MOUNT - OUTSIDE HALF |
| 20 | 79680A1 | COVER, UPPER MOUNT - INSIDE HALF |
| 21 | 24929 | PACKING, "U" CUP |
| 22 | 12-24889 | WASHER, UPPER MOUNT STUD (17/32" I.D.) |
| 23 | 12-24891 | WASHER, RUBBER - UPPER MOUNT STUD |
| 24 | 23-30474 | SPACER, UPPER MOUNT STUD |
| 25 | 12-11367 | WASHER, UPPER MOUNT STUD (25/64" I.D.) |
| 26 | 11-23161 | NUT, UPPER MOUNT STUD |
| 27 | 25305 | CAP, RUBBER - UPPER MOUNT |
| 28 | 10-28772 | SCREW, UPPER MOUNT COVER (1-1/2") |
| 29 | 10-29389 | SCREW, UPPER MOUNT COVER (1-7/8") |
| 30 | 12-8M0204649 | WASHER, MOUNTING COVER SCREW |
| 31 | 11-35888 | NUT, MOUNTING COVER SCRW |
| 32 | 75304T1 | MOUNT, RUBBER - LOWER |
| 33 | 12-28053 | WASHER, RUBBER - LOWER MOUNT |
| 34 | 12-28051 | WASHER, LOWER MOUNT |
| 35 | 12-30119 | WASHER, MOUNTING SCREW (1/8") Comment: USE WITH A-30202A1 BOTTOM YOKE |
| 36 | 11-25096 | NUT, MOUNTING SCREW |
| 37 | 10-24874 | SCREW, LOWER MOUNT (5-1/2") |
| 38 | 25067 | BUMPER, RUBBER - MOUNTINS SCREW |
| 39 | 28242 | COVER, LOWER MOUNT (STARBOARD SIDE) |
| 40 | 10-29256 | SCREW, LOWER MOUNT COVER FASTENING |
| 41 | 22-390721 | PLUG, GREASE - REVERSE LOCK HOLE |
▶FLYWHEEL ASSEMBLY AND STATOR (16 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| - | 12-26907 | WASHER, RATCHET TO FLYWHEEL (1/8" SPACER) |
| 1 | 11-8M0214915 | NUT, FLYWHEEL |
| 2 | 12-26617 | WASHER, FLYWHEEL NUT |
| 3 | 20455A2 | KEY, FLYWHEEL |
| 4 | 215-3289A1 | FLYWHEEL ASSEMBLY (WITHOUT SPACERS) SEE NOTE #1 BELOW |
| 5 | 22823 | PULLEY, FLYWHEEL SEE NOTE #2 BELOW |
| 6 | 12-25293 | WASHER, PULLEY TO FLYWHEEL SEE NOTE #2 BELOW |
| 7 | 17-26618 | DOWEL PIN, FLYWHEEL PULLEY |
| 8 | 50-25263 | RATCHET, FLYWHEEL |
| 9 | 10-29238 | CSREW, RATCHET TO FLYWHEEL |
| 10 | 398-1455 | STATOR, ALTERNATOR-FLYWHEEL |
| 11 | 22647 | DISCONNECT, KNIFE SPLICE-STATOR LEAD WIRE |
| 12 | 32-61115 | SLEEVE, RUBBER-STATOR LEAD WIRE |
| 13 | 10-68918 | SCREW, STATOR TO UPPER END CAP |
| 14 | 54-24836 | CLIP, STATOR LEAD TO CRANKCASE FLANGE |
| 15 | 10-8M0113176 | SCREW, STATOR LEAD CLIP FASTENING |
▶FUEL PUMP ASSEMBLY (30 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| - | 22-390721 | PLUG, PIPE - FUEL PUMP |
| -- | 22-22948 | NUT, FILTER TEE |
| 1 | 30269A2 | FUEL PUMP ASSEMBLY |
| 2 | 27-23005 | GASKET, CHECK VALVE TO HOUSING |
| 3 | 21-8M0082362 | VALVE, CHECK |
| 4 | 23004 | RETAINER, CHECK VALVE |
| 5 | 10-43725 | SCREW, RETAINER TO HOUSING |
| 6 | 27-24863 | GASKET, FUEL PUMP |
| 7 | 23014 | DIAPHRAGM, FUEL PUMP |
| 8 | 23008 | COVER, FUEL PUMP |
| 9 | 27-30276 | GASKET, FUEL PUMP COVER |
| 10 | 10-29126 | SCREW, FUEL PUMP MOUNTING (1-3/4") Comment: SERIAL 01261035-09999999 |
| 11 | 10-29029 | SCREW, FUEL PUMP MOUNTING (1-1/2") |
| 12 | 22-22993 | CONNECTOR, FUEL LINE TO FUEL PUMP INLET |
| 13 | 22-22946 | SLEEVE, RUBBER |
| 14 | 22-22948 | NUT, ELBOW |
| 15 | 32-30035 | FUEL LINE, FUEL PUMP TO LOWER FILTER |
| 16 | 22-22995 | ELBOW, FUEL PUMP OUTLET TO FUEL LINE |
| 17 | 22-22946 | SLEEVE, RUBBER |
| 18 | 22-22948 | NUT, ELBOW |
| 19 | 32-30036 | FUEL LINE, FUEL PUMP TO ADAPTOR |
| 20 | 22833 | ADAPTOR, CHECK UNIT (FUEL LINE) |
| 21 | 23069 | STEM, CHECK UNIT ADAPTOR |
| 22 | 25-16524 | "O" RING, ADAPTOR STEM |
| 23 | 24-23067T | SPRING, ADAPTOR STEM |
| 24 | 30188 | CUP WASHER, ADAPTOR |
| 25 | 10-20784 | SCREW, ADAPTOR TO BOTTOM COWL |
| 26 | 11-24652 | NUT, ADAPTOR SCREW |
| 27 | 32-30040 | FUEL LINE, UPPER TO LOWER FILTER |
| 28 | 22-25956 | TEE ASSEMBLY, LOWER FILTER Comment: SERIAL 01261035-09999999 |
▶GEAR HOUSING ASSEMBLY (PAGE 1) (32 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| - | 27-31367 | GASKET, WATER INTAKE SCREEN TO GEAR HOUSING |
| 1 | 1603-1868A4 | GEAR HOUSING ASSEMBLY (7/16" STUD) Comment: SERIAL 01231090-09999999 |
| 2 | 16-8M0133358 | STUD, GEAR HOUSING TO DRIVE SHAFT HOUSING (7/16" X 2") Comment: SERIAL 01231090-09999999 |
| 3 | 31-62091T | BEARING, ROLLER - DRIVE SHAFT |
| 4 | 32-23652 | TUBE, WATER INLET - LOWER |
| 5 | 23-23651 | SLEEVE, WATER INLET TUBE |
| 6 | 26-20232 | SEAL, WATER TUBE |
| 7 | 35-23654 | SCREEN, WATER INTAKE - GEAR HOUSING |
| 8 | 45-29618A1 | DRIVE SHAFT ASSEMBLY ( LONG SHAFT) |
| 9 | 53-29115 | RING, RETAINING - BALL BEARING (3/4" I.D.) - SEE NOTE |
| 10 | 43-20834 | GEAR, PINION |
| 11 | 14-29163 | TAB WASHER, PINION GEAR SCREW |
| 12 | 10-20925 | SCREW, PINION GEAR RETAINING |
| 13 | 15-20929A1 | SHIM, BALL BEARING TO DRIVE SHAFT |
| 14 | 30-72961 | BEARING, BALL - DRIVE SHAFT |
| 15 | 25-26722 | "O" RING, WATER PUMP CARTRIDGE |
| 16 | 46-29117A1 | WATER PUMP CARTRIDGE ASSEMBLY |
| 17 | 26-90562 | OIL SEAL |
| 18 | 28091 | INSER, WATER UMP CARTRIDGE |
| 19 | 28-28657 | KEY, WATER PUMP CARTRIDGE |
| 20 | 47-89983T | IMPELLER, WATER PUMP |
| 21 | 28-8M0032837 | PIN, IMPELLER DRIVE |
| 22 | 20272 | PLATE, OUTLET - WATER PUMP COVER |
| 23 | 20270A2 | WATER PUMP COVER ASSEMBLY |
| 24 | 26-23517 | OIL SEAL |
| 25 | 25-20273 | RING, RUBBER - CENTRIFUGAL SLINGER |
| 26 | 25-29619 | "O" RING, DRIVE SHAFT - UPPER |
| 27 | 25136 | SHAFT, SHIF - LOWER |
| 28 | 53-29641 | CLIP, RETAINING - SHIFT SHAFT |
| 29 | 23-46284A1 | BUSHING ASSEMBLY, SHIF SHAFT |
| 30 | 26-892361 | OIL SEAL (SPRING LOADED) |
| 31 | 25-25439 | "O" RING, SHIFT SHAFT BUSHING |
▶GEAR HOUSING ASSEMBLY (PAGE 2) (33 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| -- | 48-29296A2 | PROPELLER ASSEMBLY (2 BLADE - ALUMINUM) |
| 32 | 52918 | CAM, LOWER REVERSE LOCKING |
| 33 | 52919 | CAM UPPER REVERSE LOCKING |
| 34 | 12-191833 | WASHER, GREASE FILLER AND FLUSHING HOLE SCREW |
| 35 | 10-79953Q04 | SCREW, GREASE FILLER AND FLUSHING HOLE |
| 36 | 19643 | WASHER, GEAR HOUSING VENT SCREW |
| 37 | 10-28653 | SCREW, GEAR HOUSING VENT |
| 38 | 760394 | CAM, SHIFT |
| 39 | 20930 | FOLLOWER, CAM |
| 40 | 20843 | SLIDE, CROSS PIN |
| 41 | 24-20254 | SPRING, CAM FOLLOWER PIN |
| 42 | 15-20928A1 | SHIM, BALL BEARING TO GEAR HOUSING |
| 43 | 30-20840 | BEARING, BALL - FORWARD GEAR |
| 44 | 43-20975A5 | FORWARD GEAR ASSEMBLY |
| 45 | 31-20249 | BEARING, ROLLER - FORWARD GEAR |
| 46 | 52-32189 | RATCHET, SLIDING CLUTCH |
| 47 | 17-20841 | PIN, CROSS - RATCHET TO PROPELLER SHAFT |
| 48 | 53-20842 | RING, RETAINING - CROSS PIN |
| 49 | 44-25254 | SHAFT, PROPELLER |
| 50 | 43-20975A5 | REVERSE GEAR ASSEMBLY |
| 51 | 20864 | RING, ADAPTOR - BALL BEARING |
| 52 | 30-20839T | BEARING, BALL - REVERSE GEAR |
| 53 | 15-20927A1 | SHIM, ADAPTOR RING TO GEAR HOUSING |
| 54 | 25-20863 | "O" RING, BEARING CARRIER |
| 55 | 20862A1 | BEARING CARRIER ASSEMBLY |
| 56 | 31-20249 | BEARING, ROLLER |
| 57 | 26-90562 | OIL SEAL |
| 58 | 12-22970 | WASHER, GEAR HOUSING COVER |
| 59 | 20865 | COVER, GEAR HOUSING |
| 60 | 12-25251 | WASHER, BACKING (1/8") |
| 61 | 12-25252 | WASHER, BACING (1/32") |
| 62 | 14-25250 | TAB WASHER, PROPELLER NUT |
| 63 | 11-29825 | NUT, PROPELLER (NYLON) |
▶MAGNETO ADAPTOR AND PILOT ASSEMBLY (66 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| - | 29321A7 | MAGNETO ADAPTOR AND PILOT ASSEMBLY, COMPLETE |
| -- | 12-20533 | WASHER, MAGNETO STOP FASTENING SCREW Comment: SERIAL 00000000-01231089 |
| 1 | 394-2271A2 | MAGNETO ASSEMBLY, COMPLETE |
| 2 | 45-27951 | SHAFT, MAGNETO DRIVE |
| 3 | 39560A1 | MAGNETO PILOT ASSEMBLY Comment: SERIAL 01231090-09999999 |
| 4 | 30-20066 | BEARING, BALL-MAGNETO PILOT |
| 5 | 24-27944 | SPRING, HORSESHOE-MAGNETO PILOT |
| 6 | 17-27962 | PIN, ANCHOR-AHORSESHOE SPRING TO PILOT |
| 7 | 12-8M0204649 | WASHER, HORSESHOE SPRING TO ANCHOR PIN |
| 8 | 27946A1 | ECONOMIZER COLLAR AND PIN ASSEMBLY |
| 9 | 17-27961 | PIN, ECONOMIZER COLLAR-SPRING RETAINER |
| 10 | 22-25094 | FITTING, GREASE-ECONOMIZER COLLAR |
| 11 | 38230A1 | THROTTLE ACTUATOR ASSEMBLY |
| 12 | 23-26602 | BUSHING, NYLON-THROTTLE ACTUATOR |
| 13 | 10-20665 | SCREW, THROTTLE ACTUATOR TO ECONOMIZER COLLAR |
| 14 | 12-847883 | WASHER, THROTTLE ACTUATOR SCREW |
| 15 | 27947 | SWIVEL, LINKAGE-ECONOMIZER COLLAR |
| 16 | 25996A1 | SWIVEL AND LINK ROD ASSEMBLY |
| 17 | 66856A1 | ADAPTOR, MAGNETO |
| 18 | 22-25094 | FITTING, GREASE-MAGNETO ADAPTOR |
| 19 | 12-27939 | WASHER, MAGNETO PILOT |
| 21 | 13-27959 | WASHER, WAVE-MAGNETO BALL BEARING TENSION |
| 22 | 27955 | CAP, MAGNETO ADAPTOR AND PILOT FASTENING |
| 23 | 10-30110 | SCREW, ADAPTOR AND PILOT TO MANGETO |
| 24 | 10-78841 | SCREW, ADAPTOR AND PILOT TO CRANKCASE |
| 25 | 12-20084 | WASHER, ADAPTOR AND PILOT TO CRANKCASE SCREW |
| 26 | 11-22053 | NUT, ADAPTOR AND PILOT TO CRANKCASE SCREW |
| 27 | 53458 | PLATE, THROTTLE STOP Comment: SERIAL 01231090-09999999 |
| 28 | 37-29315 | DECAL, THROTTLE STOP PLATE Comment: SERIAL 01231090-09999999 |
| 29 | 10-24933 | SCREW, THROTTLE STOP ADJUSTING Comment: 2 EACH REQUIRED WITH A-27943 PLATE |
| 30 | 11-20088 | NUT, THROTTLE STOP ADJUSTING SCREW Comment: 2 EACH REQUIRED WITH A-27943 PLATE |
| 31 | 26852 | CAP, NYLON-ADJUSTING SCREW Comment: 2 EACH REQUIRED WITH A-27943 PLATE |
| 32 | 10-69035 | SCREW, THROTTLE STOP PLATE TO ADAPTOR |
| 33 | 28-28657 | KEY, MAGNETO DRIVING |
| 34 | 23-27957 | SPACER, PULLEY TO MAGNETO ADAPTOR CAP - OLD STYLE |
| 35 | 29783A2 | PULLEY, DRIVEN - OLD STYLE |
| 36 | 20136 | FLANGE, DRIVEN PULLEY - OLD STYLE |
| 37 | 29784 | HUB, DRIVEN PULLEY - NEW STYLE-SEE NOTE BELOW |
| 38 | 29783A1 | DRIVEN PULLEY ASSEMBLY - NEW STYLE-SEE NOTE BELOW |
| 39 | 17-24873 | ROLL PIN, FLANGE LOCATING - NEW STYLE-SEE NOTE BELOW |
| 40 | 29785 | FLANGE, DRIVEN PULLEY - NEW STYLE-SEE NOTE BELOW |
| 41 | 12-20138 | WASHER, PULLEY CLAMPING SCREW |
| 42 | 10-32228 | SCREW, PULLEY CLAMPING |
| 43 | 20140 | BELT, TIMING |
| 44 | 27949 | ROD, LIN-UPPER |
| 45 | 11-25168 | NUT, UPPER LINK ROD ADJUSTING |
| 46 | 27948 | SWIVEL, UPPER AND LOWER LIND RODS |
| 47 | 28061 | LEVER, LINKAGE-UPPER |
| 48 | 27941 | LEVER, LINKAGE-LOWER |
| 49 | 27950 | ROD, LIN-LOWER |
| 50 | 27940 | SHAFT, VERTICAL |
| 51 | 23-22981 | BUSHING, NYLON-VERTICAL SHAFT |
| 52 | 17-25870 | ROLL PIN, VERTICAL SHAFT AND LINKAGE LEVERS |
| 53 | 12-8M0204649 | WASHER, UPPER AND LOWER SWIVEL |
| 54 | 11-8267089 | NUT, UPPER AND LOWER SWIVEL TO LEVER AND BRACKET |
| 55 | 10-25781 | SCREW, SET-LINKAGE LEVER |
| 56 | 12-25866 | WASHER, VERTICAL SHAFT-CENTER |
| 57 | 33-813416 | SPARK PLUG |
| 58 | 85-63709A1 | PROTECTOR, SPARK PLUG |
| 59 | 84-821945A46 | CABLE, HIGH TENSION LEAD-SPARK PLUG |
| 60 | 25-25429 | "O" RING, HIGH TENSION LEAD CABLE TO END CAP COVER |
| 61 | 54-20534 | CLIP, HIGH TENSION LEAD CABLE FASTENING |
| 62 | 54-25231 | CLIP, MERCURY SWITCH AND HARNESS LEADS |
| 63 | 10-20401 | SCREW, LEAD CLIP TO MAGNETO |
| 64 | 8M0084613 | "D" WASHER, CLIP FASTENING SCREW |
| 65 | 394-1134A1 | GROUND STRAP ASSEMBLY, MAGNETO TO CRANKCASE |
▶MAGNETO ASSEMBLY (INTERNAL PARTS) (47 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| - | 394-2271A2 | MAGNETO ASSEMBLY, COMPLETE (4 D-3) SEE NOTE BELOW |
| -- | 10-25509 | SCREW AND LOCKWASHER, BRACKET LOCKING |
| 1 | 394-1570 | FRAME, MAGNETO HOUSING |
| 2 | 10-25510 | SCREW, SET-COIL BRIDGE |
| 3 | 394-1051 | LOCKWIRE, COIL BRIDGE SET SCREW |
| 4 | 30-24998 | BEARING, BALL (DRIVE END) |
| 5 | 394-1067A1 | MAGNETO ROTOR AND SHAFT |
| 6 | 30-49090 | BEARING, BALL (OPPOSITE DRIVE END) |
| 7 | 394-1637 | SUPPORT, BALL BEARING |
| 8 | 10-25509 | SCREW AND LOCKWASHER, SUPPORT TO FRAME |
| 9 | 84-60466A13 | WIRE ASSEMBLY, PRIMARY GROUND LEAD |
| 10 | 10,10-29182 | SCREW, PRIMARY GROUND |
| 11 | 394-1579 | INSULATOR, PRIMARY GROUND TERMINAL |
| 12 | 12-29099 | WASHER, INSULATING-PRIMARY GROUND SCREW |
| 13 | 23-62769 | BUSHING, INSULATING-HOUSING FRAME |
| 14 | 12-26014 | WASHER, PRIMARY GROUND SCREW |
| 15 | 11-24656 | NUT, LOCK-PRIMARY GROUND SCREW |
| 16 | 11-68219 | NUT, PRIMARY GROUND SCREW |
| 17 | 394-1128A1 | COIL ASSEMBLY |
| 18 | 394-1050 | CLIP, COIL-HIGH TENSION |
| 19 | 13-23836 | LOCKWASHER, COIL TERMINAL |
| 20 | 394-1131 | NUT, COIL CLIP FASTENING |
| 21 | 393-1504A11 | BREAKER ASSEMBLY |
| 22 | 393-1586 | GROMMET, PLASTIC-BREAKER BRACKET |
| 23 | 16-29230 | STUD, PRIMARY LEAD AND TENSION SPRING FASTENING |
| 24 | 11-29236 | NUT, PRIMARY LEAD FASTENING |
| 25 | 394-1106A1 | HOLDER AND CAM WICK ASSEMBLY |
| 26 | 12-26439 | WASHER, BREAKER PIVOT PIN |
| 27 | 18-26953 | COTTPER PIN, BREAKER TO PIVOT PIN |
| 28 | 10-20597 | SCREW, BREAKER HOLDER TO HOUSING |
| 29 | 394-1130A1 | CONDENSER |
| 30 | 10-25509 | SCREW AND LOCKWASHER, CONDENSER FASTENING |
| 31 | 27-29166 | GASKET, MAGNETO COVER |
| 32 | 394-1577A2 | COVER, MAGNETO |
| 33 | 10-29418 | SCREW, COVER TO FRAME |
| 34 | 14-38359 | TAB WASHER, COVER FASTENING SCREW |
| 35 | 394-2602A1 | MAGNETO ROTOR ASSEMBLY |
| 36 | 394-1110 | CLIP, SPRING |
| 37 | 27-25725 | GASKET, END CAP COVER |
| 38 | 394-1561A2 | END CAP COVER ASSEMBLY |
| 39 | 394-1065A1 | LEAD ASSEMBLY, HIGH TENSION |
| 40 | 394-1056A1 | BRUSH AND SPRING ASSEMBLY |
| 41 | 10-25517 | SCREW, HIGH TENSION CABLE FASTENING |
| 42 | 29121 | PIPE PLUG, END CAP COVER |
| 43 | 10-29418 | SCREW, END CAP COVER TO MAGNETO COVER |
| 44 | 14-38359 | TAB WASHER, COVER FASTENING SCREW |
| 45 | 22-996642 | ELBOW, PLASTIC-MAGNETO COVER VENT |
▶MISCELLANEOUS PARTS/ACCESSORIES (1 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| - | 90-45772 | MARK 35A, MERC 300, MERC 350 PARTS LIST |
▶RECTIFIER, STARTER SOLENOID AND WIRING HARNESS (26 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| -- | 13-26992 | LOCKWASHER, SOLENOID FATENING SCREW |
| 1 | 32177A2 | RECTIFIER ASSEMBLY |
| 2 | 32-26693A1 | SLEEVE, RECTIFIER LEAD (RED) |
| 3 | 22647 | DISCONNECT, KNIFE SPLICE - RECTIFIER LEAD WIRES |
| 4 | 13-8M0204647 | LOCKWASHER, RECTIFIER MOUNTING SCREW |
| 5 | 11-21929 | NUT, RECTIFIER MOUNTING SCREW |
| 6 | 28597 | BRACKET, RECTIFIER MOUNTING |
| 7 | 10-21091 | SCREW, RECTIFIER BRACKET TO BOTTOM COWL |
| 8 | 11-24652 | NUT, BRACKET MOUNTING SCREW |
| 9 | 54-24836 | CLAMP, LEAD WIRE TO RECTIFIER BRACKET - UPPER (1/4") |
| 10 | 54-22740 | CLAMP, LEAD WIRE TO RECTIFIER BRACKET - LOWER (3/8") |
| 11 | 10-8M0113176 | SCREW, LEAD WIRE CLAMP TO BRACKET |
| 12 | 8M0084613 | "D" WASHER, CLAMP FASTENING SCREW |
| 13 | 32445A1 | SOLENOID, STARTER |
| 14 | 28016A1 | GROUND STRAP ASSEMBLY, SOLENOID TO STARTER |
| 15 | 84-93389A12 | WIRE, STRTER TO STARTER SOLENOID |
| 16 | 13-8M0204647 | LOCKWASHER, SOLENOID TERMINAL (5/16") |
| 17 | 11-26062 | NUT, CAP - SOLENOID TERMINAL - OUTSIDE (5/16") |
| 18 | 10,13-26996 | LOCKWASHER, SOLENOID TERMINAL |
| 19 | 10,11-68219 | NUT, SOLENOID TERMINAL |
| 20 | 10-29238 | SCREW, SOLENOID TO STARTER MOTOR |
| 21 | 33401 | WIRING HARNESS (INTERNAL) |
| 22 | 24-28975 | SPRING, GARTER - INTERNAL WIRING HARNESS |
| 23 | 26079A2 | PLATE, BACKING - WIRING HARNESS |
| 24 | 10-45893 | SCREW, BACKING PLATE TO BOTTOM COWL |
| 25 | 54-22783 | "S" CLIP, WIRING HARNESS LEADS TO BOTTOM COWL |
▶TOP COWL AND STARTER ASSEMBLY (36 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| -- | 11-28968 | NUT, SPEED-VENT SCREEN TO TOP COWL - SEE NOTE #1 BELOW |
| 1 | 177-1600A2 | TOP COWL ASSEMBLY |
| 2 | 16-20500 | STUD, REAR - TOP COWL TO COVER |
| 3 | 16-20353 | STUD, FRONT-TOP COWL TO CRANKCASE |
| 4 | 25-20116 | GROMMET, CHOKE KNOB |
| 5 | 37-46023A1 | DECAL SET, TOP COWL |
| 6 | 23-20326 | SPACER, TOP COWL STUD |
| 7 | 12-69057 | WASHER, TOP COWL STUD (3/4" O.D.) |
| 8 | 12-20583 | WASHER, TOP COWL STUD (1/32" THICK) |
| 9 | 11-8267089 | NUT, TOP COWL FASTENING |
| 10 | 20155 | RETAINER, STARTER SPRING |
| 11 | 24-29340T02 | SPRING, STARTER REWIND |
| 12 | 23-28912 | BUSHING, SPRING GUIDE |
| 13 | 50-30994 | SHEAVE ASSEMBLY |
| 14 | 30596 | PAWL, STARTER |
| 15 | 13-36206 | WASHER, WAVE-STARTER PAWL |
| 16 | 23-28919 | BUSHING, NYLON-SHEAVE SHAFT SPACER |
| 17 | 45477A1 | SPACER, SHEAVE SHAFT |
| 18 | 26179 | RETAINER, WAVE WASHER |
| 19 | 12-26180 | WASHER, WAVE WASHER RETAINER |
| 20 | 13-20160 | WASHER, WAVE-RETAINER TENSION |
| 21 | 30595 | PLATE, RETAINER STARTER PAWL |
| 22 | 45477A1 | SHAFT, SHEAVE |
| 23 | 50-12066Q10 | STARTER CABLE ASSEMBLY |
| 24 | 28747 | HANDLE, STARTER CABLE |
| 25 | 79470A1 | RETAINER, STARTER CABLE AND HANDLE |
| 26 | 28944 | HANDLE, TOP COWL |
| 27 | 10-28667 | SCREW, HANDLE TO TOP COWL |
| 28 | 10-56500 | SCREW, HANDLE TO TOP COWL |
| 29 | 11-8267089 | NUT, HANDLE FASTENING SCREW |
| 30 | 28967 | SCREEN, VENT-TOP COWL |
| 31 | 10-26668 | SCREW, VENT SCREEN TO TOP COWL - SEE NOTE #1 BELOW |
| 32 | 14-20165 | TAB WASHER, SHEAVE SHAFT NUT |
| 33 | 11-20166 | NUT, SHEAVE SHAFT (LEFT HAND THREAD) |
| 34 | 30045 | PLATE, ROPE GUIDE (SEE NOTE #2 BELOW) |
| 35 | 10-28642 | SCREW, DRIVE-ROPE GUIDE PLATE TO TOP COWL |
100-Hour / Annual Service Checklist
Regular maintenance keeps your Mercury 300 350 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.
- Choosing a selection results in a full page refresh.