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Mercury 9.8 (5206550 & Up) Parts & Diagrams
🔎 Mercury 9.8 Reference Library — Exploded parts diagrams (16 diagrams), specifications, common issues, and maintenance checklist.
The Mercury 9.8 is a 4-Stroke, Inline 2-Cylinder, EFI outboard motor. A popular choice for small fishing boats, inflatable RIBs, and sailboat auxiliaries.
Quick Reference Specifications
| Specification | Value |
|---|---|
| Engine Type | 4-Stroke, Inline 2-Cylinder, EFI |
| Horsepower | 10 HP |
| Displacement | 209 cc |
| Bore x Stroke | 55 mm x 44 mm |
| Spark Plug (Type & Gap) | NGK DCPR6E |
| Engine Oil Capacity | 0.8 L (27 fl oz) |
| Recommended Engine Oil | SAE 10W-30 Mercury 4-Stroke Outboard Oil |
| Gear Case Oil Capacity | 320 mL (10.8 fl oz) |
| Idle Speed (in gear) | 900 RPM |
| Full Throttle RPM Range | 5000-6000 |
| 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 9.8:
- 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 9.8.
▶BOTTOM COWL AND SHIFT LINKAGE (43 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| - | 27-89014A80 | GASKET SET |
| 1 | 2159-6587A5 | COWL ASSEMBLY, BOTTOM |
| 2 | 19-95925 | PLUG, BOTTOM COWL |
| 3 | 74360 | PLUG, BOTTOM COWL |
| 4 | 39778 | GROMMET, CHOKE SHAFT - BOTTOM COWL |
| 5 | 66353 | COVER, ACCESS HOLE |
| 6 | 65479 | COVER, ACCESS HOLE |
| 7 | 39474 | ANCHOR, LATCH - BOTTOM COWL |
| 8 | 10-22483 | SCREW, (.250-28 x 1.12), LATCH ANCHOR |
| 9 | 13-26992 | LOCKWASHER, (.250) Stainless Steel, LATCH ANCHOR SCREW |
| 10 | 23-13127 | BEARING, NYLON - WATER OUTLET TUBE |
| 11 | 26-36556 | SEAL, (.500 Inch Outside Diameter), RUBBER - WATER OUTLET TUBE |
| 12 | 10-38111 | SCREW, BOTTOM COWL (3/4") |
| 13 | 13-26992 | LOCKWASHER, (.250) Stainless Steel, BOTTOM COWL SCREW |
| 14 | 27-89937 | GASKET, POWERHEAD TO ADOPTOR PLATE |
| 15 | 74354 | RETAINER Comment: ELECTRIC |
| 16 | 10-48408 | SCREW, (#10-16 x .500) Comment: ELECTRIC |
| 17 | 24-78810 | SPRING, CALBE TO ARM LATCH |
| 18 | 78809 | LATCH, ARM - BOTTOM COWL |
| 19 | 29-714221 | BEARING, Needle, ARM LOCATING |
| 20 | 78808 | LATCH, BODY - BOTTOM COWL |
| 21 | 10-32228 | SCREW, (#10-32 x .625), LATCH TO BOTTOM COWL |
| 22 | 27-39050 | GASKET |
| 23 | 87-69508A31 | SWITCH ASSEMBLY, Stop Comment: MANUAL |
| 24 | 87-99525A1 | COVER ASSEMBLY, STOP SWITCH Comment: MANUAL |
| 25 | 13-69845 | LOCKWASHER, STOP SWITCH Comment: MANUAL |
| 26 | 11-69844 | NUT, STOP SWITCH Comment: MANUAL |
| 27 | 93730T | HANDLE, SHIFT CONTROL Comment: (ELECTRIC) |
| 28 | 12-8M0204649 | WASHER, (.281 x .500 x .060) Stainless Steel, SHIFT CONTROL SHAFT |
| 29 | 11-826709109 | NUT, SHIFT HANDLE TO SHIFT CONTROL SHAFT |
| 30 | 23-66375 | BUSHING, NYLON - SHIFT CONTROL SHAFT |
| 31 | 74350 | LEVER, SHIFT CONTROL (REMOTE) |
| 32 | 17-25905 | PIN, SHIFT LEVER TO SHIFT CONTROL SHAFT |
| 33 | 66379 | SHAFT, SHIFT CONTROL |
| 34 | 43-66377 | SECTOR GEAR |
| 35 | 12-8M0204649 | WASHER, (.281 x .500 x .060) Stainless Steel, SHIFT CONTROL SHAFT |
| 36 | 11-8267089 | NUT, (.250-28), SECTOR GEAR TO SHIFT CONTROL SHAFT |
| 37 | 24-39627 | SPRING, DETENT - SHIFT CONTROL LEVER |
| 38 | 39601 | PLATE, DETENT SPRING |
| 39 | 10-25764 | SCREW, (.190-32 x .50) |
| 40 | 23-27132 | BUSHING, NYLON - UPPER SHIFT SHAFT |
| 41 | 43-86686A1 | SECTOR GEAR, SHIFT SHAFT |
| 42 | 71660 | SHIFT SHAFT |
▶CARBURETOR AND CHOKE ASSEMBLY (19 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| - | 27-89014A80 | GASKET SET |
| 1 | 1364-8782A13 | CARBURETOR ASSEMBLY Comment: (WALBRO) MERC 9.8 |
| 2 | 11-24652 | NUT, (.250-28), CARBURETOR ATTACHING |
| 3 | 32-8M0108355 | LINE, (57.00 Inches Bulk), ADAPTOR TO CARBURETOR |
| 4 | 54-68424 | CLAMP, FUEL LINE ATTACHING |
| 5 | 22-63981 | FITTING, FUEL LINE TO ADAPTOR |
| 6 | 22833 | ADAPTOR, CHECK UNIT (FUEL LINE) |
| 7 | 23069 | STEM, CHECK UNIT ADAPTOR |
| 8 | 25-16524 | O-RING, ADAPTOR STEM |
| 9 | 24-23067T | SPRING, ADAPTOR STEM |
| 10 | 30188 | WASHER, ADAPTOR |
| 11 | 10-37923 | SCREW, (.250-28 x 1.250), ADAPTOR TO BOTTOM COWL |
| 12 | 65552 | SCREEN, CARBURETOR Comment: (Use where applicable) |
| 13 | 10-69022 | SCREW, (#10-32 x .500) Stainless Steel, SCREEN TO CARBURETOR Comment: (Use where applicable) |
| 14 | 86381 | KNOB, CHOKE |
| 15 | 11-73710 | NUT, CHOKE CABLE TO BOTTOM COWL |
| 16 | 72465 | CABLE, Choke |
| 17 | 10-45862 | SCREW, (#10-32 x .875), CHOKE CABLE TO CARBURETOR |
| 18 | 12-34680 | WASHER, CHOKE CABLE SCREW |
▶CARBURETOR(TILLOTSON STAMPED 1364-7902 or 1364-7909) (44 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| - | 27-89014A80 | GASKET SET |
| 1 | 1364-8782A13 | CARBURETOR ASSEMBLY, COMPLETE Comment: (9.8) |
| 2 | NSS | NOT SOLD SEPARATE, WELCH PLUG, BODY CHANNEL (LARGE) |
| 3 | NSS | NOT SOLD SEPARATE, ISCREW, DLE MIXTURE |
| 4 | NSS | NOT SOLD SEPARATE, SPRING, IDLE MIXTURE SCREW |
| 5 | NSS | NOT SOLD SEPARATE, SPRING, RETURN - THROTTLE SHAFT |
| 6 | NSS | NOT SOLD SEPARATE, MAIN NOZZLE |
| 7 | 1395-9293 | FLOAT |
| 8 | NSS | NOT SOLD SEPARATE, PIN, FLOAT |
| 9 | 1399-5127 | BOWL, Fuel |
| 10 | NSS | NOT SOLD SEPARATE, GASKET, FUEL BOWL |
| 11 | 1399-5128 | SCREW, FUEL BOWL |
| 12 | NSS | NOT SOLD SEPARATE, GASKET, FUEL BOWL SCREW |
| 13 | 1399-6141 | NEEDLE, Inlet |
| 14 | NSS | NOT SOLD SEPARATE, WELCH PLUG, BODY CHANNEL (SMALL) |
| 15 | 1399-2407 | JET, Main Fuel (.039) Comment: (9.8) |
| 16 | NSS | NOT SOLD SEPARATE, PLUG, BODY CHANNEL |
| 17 | 1399-7274 | SHUTTER, Choke |
| 18 | NSS | NOT SOLD SEPARATE, SCREW, CHOKE SHUTTER |
| 19 | 69764 | VENTURI |
| 20 | NSS | NOT SOLD SEPARATE, GASKET, FUEL PUMP DIAPHRAGM |
| 21 | NSS | NOT SOLD SEPARATE, DIAPHRAGM, FUEL PUMP |
| 22 | 1399-5129 | BODY, FUEL PUMP |
| 23 | NSS | NOT SOLD SEPARATE, GASKET, FUEL PUMP DIAPHRAGM |
| 24 | NSS | NOT SOLD SEPARATE, DIAPHRAGM, FUEL PUMP |
| 25 | 1399-5131 | BODY, STRAINER |
| 26 | 1395-808612 | SCREW, STRAINER BODY |
| 27 | 1399-5758 | SCREEN, STRAINER |
| 28 | 1399-5207 | GASKET, STRAINER COVER |
| 29 | 99941 | COVER, STRAINER (INLET) |
| 30 | NSS | NOT SOLD SEPARATE, SCREW, STRAINER COVER |
| 31 | NSS | NOT SOLD SEPARATE, GASKET, STRAINER COVER SCREW |
| 32 | 1399-7273 | SHAFT, Choke |
| 33 | NSS | NOT SOLD SEPARATE, SPRING, RETURN - CHOKE SHAFT |
| 34 | 1399-7571 | SHAFT, Throttle |
| 35 | 44425 | LEVER, THROTTLE |
| 36 | 10-38055 | SCREW, (.190-32 x .62), THROTTLE LEVER |
| 37 | 11-87599 | NUT, THROTTLE LEVER SCREW |
| 38 | NSS | NOT SOLD SEPARATE, IDLE TUBE |
| 39 | NSS | NOT SOLD SEPARATE, GASKET, IDLE TUBE |
| 40 | 10-23178 | SCREW, PLUG - IDLE TUBE |
| 41 | 1399-7572 | SHUTTER, Throttle |
| 42 | NSS | NOT SOLD SEPARATE, SCREW, THROTTLE SHUTTER |
| 43 | 27-63309 | GASKET, CARBURETOR FLANGE |
▶CARBURETOR(WALBRO STAMPED WMB-1/WMB-2 /WMB-3/WMB-4 (42 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| - | 27-89014A80 | GASKET SET |
| 1 | 1364-8782A13 | CARBURETOR ASSEMBLY, COMPLETE Comment: (9.8) |
| 2 | NSS | NOT SOLD SEPARATE, WLECH PLUG, BODY CHANNEL (LARGE) |
| 3 | NSS | NOT SOLD SEPARATE, SCREW, IDLE MIXTURE |
| 4 | NSS | NOT SOLD SEPARATE, SPRING, IDLE MIXTURE SCREW |
| 5 | NSS | NOT SOLD SEPARATE, SPRING, RETURN - THROTTLE SHAFT |
| 6 | NSS | NOT SOLD SEPARATE, GASKET, FUEL PUMP DIAPHRAGM |
| 7 | 1395-9293 | FLOAT |
| 8 | NSS | NOT SOLD SEPARATE, PIN, FLOAT |
| 9 | 1399-5127 | BOWL, Fuel |
| 10 | NSS | NOT SOLD SEPARATE, GASKET, FUEL BOWL |
| 11 | 1395-9025 | SCREW, FUEL BOWL |
| 12 | NSS | NOT SOLD SEPARATE, GASKET, FUEL BOWL SCREW |
| 13 | 1395-9022 | NEEDLE AND SPRING, Inlet |
| 14 | NSS | NOT SOLD SEPARATE, WELCH PLUG, BODY CHANNEL (SMALL) |
| 15 | 1399-2407 | JET, Main Fuel (.039) Comment: (9.8) |
| 16 | NSS | NOT SOLD SEPARATE, PLUG, BODY CHANNEL |
| 17 | 1399-7274 | SHUTTER, Choke |
| 18 | NSS | NOT SOLD SEPARATE, SCREW, CHOKE SHUTTER |
| 19 | NSS | NOT SOLD SEPARATE, VENTURI |
| 20 | NSS | NOT SOLD SEPARATE, GASKET, FUEL PUMP DIAPHRAGM |
| 21 | NSS | NOT SOLD SEPARATE, DIAPHRAGM, FUEL PUMP |
| 22 | 1399-5129 | BODY, FUEL PUMP |
| 23 | NSS | NOT SOLD SEPARATE, GASKET, FUEL PUMP DIAPHRAGM |
| 24 | NSS | NOT SOLD SEPARATE, DIAPHRAGM |
| 25 | 1399-5131 | BODY, STRAINER |
| 26 | 1395-808612 | SCREW, STRAINER BODY |
| 27 | 1399-5758 | SCREEN, STRAINER |
| 28 | 1399-5207 | GASKET, STRAINER COVER |
| 29 | 99941 | COVER, STRAINER (INLET) |
| 30 | NSS | NOT SOLD SEPARATE, SCREW, STRAINER COVER |
| 31 | NSS | NOT SOLD SEPARATE, GASKET, STRAINER COVER SCREW |
| 32 | 1399-7273 | SHAFT, Choke |
| 33 | NSS | NOT SOLD SEPARATE, SPRING, RETURN - CHOKE SHAFT |
| 34 | 1399-7571 | SHAFT, Throttle |
| 35 | 44425 | LEVER, THROTTLE |
| 36 | 10-38055 | SCREW, (.190-32 x .62), THROTTLE LEVER |
| 37 | 11-87599 | NUT, THROTTLE LEVER SCREW |
| 40 | 10-23178 | SCREW, PLUG - IDLE TUBE |
| 41 | 1399-7572 | SHUTTER, Throttle |
| 42 | NSS | NOT SOLD SEPARATE, SCREW, THROTTLE SHUTTER |
| 43 | 27-63309 | GASKET, CARBURETOR FLANGE |
▶CLAMP BRACKET ASSEMBLY (18 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| 1 | 1468-5570A3 | CLAMP BRACKET ASSEMBLY (PORT) |
| 2 | 1467-5571A3 | CLAMP BRACKET ASSEMBLY (STARBOARD) |
| 3 | 10-77190A3 | THUMB SCREW ASSEMBLY |
| 4 | 10-768042 | SCREW, THUMB SCREW |
| 5 | 12-73719 | WASHER, THUMB SCREW |
| 6 | 12-71421 | WASHER, Nylon, TILT TUBE - CLAMP TO SWIVEL BRACKET |
| 7 | 96962 | TILT TUBE, CLAMP TO SWIVEL BRACKET |
| 8 | 19-39333 | PLUG, TILT TUBE |
| 9 | 11-93164 | NUT, (.875), TILT TUBE FASTENING |
| 10 | 71420 | HANDLE, CARRYING |
| 11 | 16-71417 | STUD, CLAMP BRACKET |
| 12 | 13-26992 | LOCKWASHER, (.250) Stainless Steel, CLAMP BRACKET STUD |
| 13 | 11-29598 | NUT, (.250-28) Stainless Steel, CLAMP BRACKET STUD |
| 14 | 17-71418A2 | PIN ASSEMBLY, Tilt Lock |
| 15 | 24-62143 | SPRING, TILT LOCK PIN |
| 16 | 10-67982 | BOLT, CLAMP BRACKET TO BOAT |
| 17 | 12-67983 | WASHER, CLAMP BRACKET SCREW |
| 18 | 11-8267098 | NUT, (.250-20), CLAMP BRACKET SCREW |
▶CRANKSHAFT, PISTONS AND CONNECTING RODS (23 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| - | 87181A80 | POWERHEAD ASSEMBLY Comment: (9.8) SN# USA-5306001/Aus-8060795/Bel-9227031/Can-7134413 & Up |
| 1 | 421-7271A2 | CRANKSHAFT ASSEMBLY Comment: SN# USA-5306001/Aus-8060795/Bel-9227031/Can-7134413 & Up |
| 2 | 26-72793 | SEAL, CRANKSHAFT Comment: SN# USA-5306000/Aus-8060794/Bel-9227030/Can-7134412 & Below |
| 3 | 79952A1 | CARRIER ASSEMBLY Comment: SN# USA-5306001/Aus-8060795/Bel-9227031/Can-7134413 & Up |
| 4 | 12-79960 | WASHER, FELT Comment: SN# USA-5306001/Aus-8060795/Bel-9227031/Can-7134413 & Up |
| 5 | 28-20094 | KEY, Woodruff, CRANKSHAFT |
| 6 | 550-8122A5 | BEARING ASSEMBLY, Main (VALVE TYPE) |
| 7 | 17-20032 | PIN, Dowel, MAIN BEARING |
| 8 | 17-65855 | PIN, Dowel, REED LOCATING |
| 9 | 10-56781 | SCREW, MAIN BEARING CLAMPING |
| 10 | 17-20032 | PIN, Dowel, MAIN BEARING TO BLOCK |
| 11 | 34-31942A1 | REED SET, MATCHED - MAIN BEARING |
| 12 | 34-20053 | STOP, Reed, MAIN BEARING REED VALVES |
| 13 | 10-27304 | SCREW, REED STOP MOUNTING |
| 14 | 608-7395A2 | CONNECTING ROD ASSEMBLY |
| 15 | 10-87374 | SCREW, (.250-28 x 1.030), CONNECTING ROD |
| 16 | 29-26815 | BEARING, Needle, CRANKPIN |
| 17 | 11-20061 | NUT, CONNECTING ROD SCREW |
| 18 | 12-65967 | WASHER, NEEDLE BEARING RETAINING |
| 19 | 29-31505 | BEARING, Needle, PISTON PIN |
| 20 | 719-7391T3 | PISTON ASSEMBLY (2 RING) |
| 21 | 40-21666 | LOCK RING, PISTON PIN |
| 22 | 39-21665A12 | RING SET, Piston |
▶CYLINDER BLOCK AND CRANKCASE (41 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| 1 | 837-7694A2 | CYLINDER BLOCK ASSEMLBY Comment: (MERC 9.8) |
| 2 | 16-728091 | STUD, (.250-20/.250-28 x 1.620), BLOCK AND CRANKCASE TO DRIVE SHAFT HOUSING |
| 3 | 10-657461 | STUD, (.250-28 x 1.00), CARBURETOR MOUNTING |
| 4 | 17-8M0084726 | PIN, Dowel (.187 x .530), CRANKCASE TO CYLINDER BLOCK |
| 5 | 10-69560 | SCREW, ADJ - THROTTLE CONTROL (1-1/4") |
| 6 | 10-32,11-68219 | NUT, Stainless Steel, THROTTLE CONTROL ADJUSTING SCREW |
| 7 | 32-892024122 | TUBING, (20.00 Feet Bulk), BLEED DRAIN (4") |
| 8 | 21-42863 | CHECK VALVE, BLEED - CRANKCASE (BOTTOM) |
| 9 | 10-76621 | SCREW, CRANKCASE TO CYLINDER BLOCK |
| 10 | 10-73280 | SCREW, CRANKCASE TO CYLINDER BLOCK |
| 11 | 15-31412A1 | SHIM |
| 12 | 1164-6413A1 | HOUSING ASSEMBLY, Bearing, UPPER |
| 13 | 30-72961 | BEARING, Ball, UPPER BEARING HOUSING |
| 14 | 31-31410 | BEARING, Roller, UPPER BEARING HOUSING |
| 15 | 26-66301 | SEAL, Oil, UPPER BEARING HOUSING |
| 16 | 25-20863 | O-RING, UPPER BEARING HOUSING |
| 17 | 10-76611 | SCREW, (.216-24 x .500), UPPER BEARING HOUSING |
| 18 | 14-78102 | TAB WASHER |
| 19 | 27-43336 | GASKET, INTAKE COVER Comment: SN# USA-5524660/Aus-8063635/Bel-9246206/Can-7143038 & Up |
| 20 | 78033 | COVER, INTAKE |
| 21 | 10-26537 | SCREW, (#10-24 x .500), INTAKE COVER TO CYLINDER BLOCK |
| 22 | 1019-7465A1 | COVER ASSEMBLY, CYLINDER BLOCK |
| 23 | 22-996642 | ELBOW, CYLINDER COVER Comment: (NON-THERMOSTAT ENGINES) |
| 24 | 27-41382 | GASKET, CYLINDER BLOCK COVER |
| 25 | 10-8M0214943 | SCREW, (.250-20 x 1.00) |
| 26 | 27-41383 | GASKET, CYLINDER BLOCK TO BAFFLE PLATE |
| 27 | 85935 | PLATE, BAFFLE - EXHAUST MANIFOLD |
| 28 | 27-89014 | GASKET, BAFFLE PLATE Comment: (THERMOSTAT ENGINES) |
| 29 | 89013A1 | COVER, EXHAUST MANIFOLD Comment: (THERMOSTAT ENGINES) |
| 30 | 10-28668 | SCREW, (.250-20 x .875) Stainless Steel |
| 31 | 75692 | THERMOSTAT Comment: (THERMOSTAT ENGINES) |
| 32 | 27-88346 | GASKET, THERMOSTAT COVER Comment: (THERMOSTAT ENGINES) |
| 33 | 27-8M0204714 | GASKET, THERMOSTAT Comment: (THERMOSTAT ENGINES) |
| 34 | 85920 | COVER, THERMOSTAT Comment: (THERMOSTAT ENGINES) |
| 35 | 24-88464 | SPRING, RETAINER - THERMOSTAT COVER Comment: (THERMOSTAT ENGINES) |
| 36 | 22-291112 | CONNECTOR, THERMOSTAT COVER Comment: (THERMOSTAT ENGINES) |
| 37 | 32-8M0108355 | HOSE, TELL-TALE |
| 38 | 46933A1 | GROUND WIRE |
| 39 | 30-72961 | BEARING, Ball (LOWER) |
| 40 | 26-66301 | SEAL, Oil, CRANKCASE (LOWER) |
| 41 | 84-63415A6 | WIRE ASSEMBLY, BLACK (ELECTRIC) |
▶DRIVESHAFT HOUSING ASSEMBLY (23 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| - | 27-89014A80 | GASKET SET |
| 1 | 1558-8453A1 | HOUSING ASSEMBLY, Driveshaft Comment: (LONG SHAFT) |
| 2 | 16-66373 | STUD |
| 3 | 11-82670911 | NUT, (.312-24) Stainless Steel |
| 4 | 11-8M0204726 | NUT, (.375-24) |
| 5 | 96515F1 | COVER, TRIM |
| 6 | 10-69013 | SCREW, (#10-16 x .880), TRIM COVER |
| 7 | 25-92012 | GROMMET, TRIM COVER SCREW |
| 8 | 32-39062 | TUBE, WATER Comment: (LONG SHAFT) |
| 9 | 10-79953Q04 | SCREW, (.375-16 x .250), FLUSH - DRIVE SHAFT HOUSING |
| 10 | 12-191833 | WASHER, SEALING - FLUSH SCREW |
| 11 | 27-39050 | GASKET |
| 12 | 11-24652 | NUT, (.250-28) |
| 13 | 1559-8448A2 | SADDLE ASSEMBLY |
| 14 | 64076 | BUMPER, THRUST - SADDLE |
| 15 | 79895A1 | MOUNT, LOWER Comment: (LONG SHAFT) |
| 16 | 53-26406 | RING, RETAINING - UPPER AND LOWER MOUNT |
| 17 | 79907 | COVER, LOWER MOUNT |
| 18 | 71057 | LINK ROD, REVERSE LOCK |
| 19 | 65216 | CAM, REVERSE LOCK |
| 20 | 72007 | RETAINER, REVERSE LOCK CAM |
| 21 | 10-65414 | SCREW, CAM RETAINER (3/4") |
| 22 | 93145 | BLOCK, DRIVE SHAFT Comment: (LONG SHAFT) |
▶ELECTRIC COMPONENTS (28 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| 1 | 50-78011 | STARTER MOTOR ASSEMBLY |
| 2 | 10-55511 | SCREW, (.312-18 x 1.500) |
| 3 | 13-8M0204647 | LOCKWASHER, (.312), STARTER MOTOR SCREW |
| 4 | 84-76741A1 | WIRE ASSEMBLY, STARTING SWITCH (YELLOW) |
| 5 | 87-73883 | SWITCH ASSEMBLY, Starting |
| 6 | 12-30516 | WASHER, STARTING SWITCH |
| 7 | 11-74394 | NUT, STARTING SWITCH |
| 8 | 74515 | PROTECTOR, STARTING SWITCH |
| 9 | 84-72535A4 | CABLE ASSEMBLY, BATTERY |
| 10 | 25-86361 | GROMMET, BATTERY CABLE |
| 11 | 10-45742 | SCREW, (.190-32 x .312), BATTERY CABLE ATTACHING |
| 12 | 10-98253 | SCREW, (.250-20 x .500), BATTERY CABLE ATTACHING |
| 13 | 74367A15 | LIGHTING STATOR ASSEMBLY Comment: BELGIUM |
| 14 | 10-73696 | SCREW, LIGHTING STATOR ATTACHING (1-5/8") |
| 15 | 10,13-26996 | LOCKWASHER, Stainless Steel, LIGHTING STATOR SCREW |
| 16 | 8M0058226 | RECTIFIER ASSEMBLY |
| 17 | 10-48408 | SCREW, (#10-16 x .500), RECTIFIER |
| 18 | 23-62769 | SPACER, RECTIFIER SCREW |
| 19 | 10-32,11-45076 | NUT, Brass, RECTIFIER TERMINAL |
| 20 | 84-61393A9 | WIRE ASSEMBLY |
| 21 | 95845T | REGULATOR, Voltage Comment: BELGIUM |
| 22 | 10-92799 | SCREW, (#10-16 x 1.12) Comment: BELGIUM |
| 23 | 23-62769 | SPACER, VOLTAGE REGULATOR SCREW Comment: BELGIUM |
| 24 | 10-32,11-45076 | NUT, Brass, VOLTAGE REGULATOR TERMINAL Comment: BELGIUM |
| 25 | 84-74725A2 | HARNESS ASSEMBLY (BLACK/RED) Comment: BELGIUM |
| 26 | 71663 | PLUG, HARNESS Comment: BELGIUM |
| 27 | 74361 | PLUG, HARNESS TO BOTTOM COWL Comment: BELGIUM |
| 28 | 84-65017A4 | HARNESS ASSEMBLY, LIGHTING (EXTERNAL) Comment: BELGIUM |
▶FLYWHEEL AND IGNITION COMPONENTS (32 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| 1 | 251-6105A9 | FLYWHEEL ASSEMBLY |
| 2 | 12-36245 | WASHER, FLYWHEEL NUT |
| 3 | 11-20696 | NUT, FLYWHEEL |
| 4 | 339-5209A9 | STATOR ASSEMBLY |
| 5 | 10-35400 | SCREW, STATOR TO END CAP (3/8") |
| 6 | 10-66707 | SCREW, STATOR TO END CAP(7/8") |
| 7 | 339-6120A1 | COIL ASSEMBLY (1-3/4" AND 3-1/2" LEADS) |
| 8 | 54-59538 | CLIP, COIL RETAINING |
| 9 | 54-85446 | CLIP, COIL RETAINING |
| 10 | 86-85365 | TERMINAL BLOCK, STATOR |
| 11 | 10-38055 | SCREW, (.190-32 x .62), TERMINAL BLOCK TO STATOR |
| 12 | 10-32,11-46438 | NUT, , TERMINAL BLOCK SCREW |
| 13 | 10-22654 | SCREW, (.190-32 x .38), LEADS TO TERMINAL BLOCK |
| 14 | 338-7283A3 | HOUSING ASSEMBLY, Trigger |
| 15 | 42501 | LINK, TRIGGER HOUSING TO THROTTLE LEVER |
| 16 | 11-65110 | NUT, PUSH - LINK TO TRIGGER HOUSING |
| 17 | 339-6222A10 | SWITCHBOX ASSEMBLY |
| 18 | 10-20189 | SCREW, (.190-32 x .75), SWITCH BOX ATTACHING |
| 19 | 12-8M0204666 | WASHER, (.203 x .500 x .032), SWITCH BOX ATTACHING SCREW |
| 20 | 61990 | TIE STRAP, (14.00 Inches) |
| 21 | 5790811 | SLEEVE, (10.00 Inches Bulk), SWITCH BOX LEADS |
| 22 | 54-53883 | CLIP, SWITCH BOX LEADS |
| 23 | 10-45218 | SCREW, (#10-32 x .380), GROUND LEAD TO CYLINDER BLOCK |
| 24 | 300-8M0166172 | COIL ASSEMBLY, Ignition |
| 25 | 66355 | COVER, IGNITION COIL |
| 26 | 10-72074 | SCREW, COIL COVER TO REAR BRACKET (4-5/8") |
| 27 | 10-32,11-20110 | NUT, , COIL COVER SCREW |
| 28 | 10-32,11-45076 | NUT, Brass, IGNITION COIL TERMINAL |
| 29 | 84-813715A1 | LEAD ASSEMBLY, HIGH TENSION |
| 30 | 332-2854T01 | BOOT, IGNITION COIL |
| 31 | 85-63709A1 | BOOT/TERMINAL KIT, SPARK PLUG |
| 32 | 33-896329828 | SPARK PLUG Comment: Belgium and Canada |
▶GEAR HOUSING(DRIVESHAFT) (36 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| - | 46-92970A5 | REPAIR KIT, Water Pump Comment: (Use with 47-89980 Impeller) |
| 1 | 1630-7360A11 | GEAR HOUSING ASSEMBLY |
| 2 | 16-58138 | STUD, GEAR HOUSING (3-7/16") |
| 3 | 16-58136 | STUD, WATER PUMP (2-3/4") |
| 4 | 31-22756 | BEARING, Roller |
| 5 | 17-20032 | PIN, Dowel |
| 6 | 26-33613 | SEAL, RUBBER |
| 7 | 23-86215 | BEARING, NYLON |
| 8 | 35-33425 | SCREEN, INTAKE |
| 9 | 10-28642 | SCREW, (#2 x 0.25), INTAKE SCREEN |
| 10 | 43-98696 | GEAR, Pinion |
| 11 | 14-30377 | TAB WASHER, PINION GEAR SCREW |
| 12 | 10-30376 | SCREW, (#12-28 x .750), PINION GEAR TO DRIVE SHAFT |
| 13 | 45-95874A1 | DRIVESHAFT Comment: (LONG) USE WITH 47-89980 IMPELLER SN# USA-5306001/Aus-8060795/Bel-9227031/Can-7134413 & Up |
| 14 | 15-30527A1 | SHIM ASSEMBLY, BALL BEARING (.002-3-5-10) |
| 15 | 30-70944 | BEARING, Ball, DRIVE SHAFT |
| 16 | 53-30523 | RING, Retaining, BALL BEARING TO DRIVE SHAFT |
| 17 | 15-30527A1 | SHIM ASSEMBLY, BALL BEARING (.002-2-5-10) |
| 18 | 46-92970A1 | HOUSING ASSEMBLY, Water Pump Comment: (USE WITH 47-89980 IMPELLER) |
| 19 | 25-29439 | O-RING |
| 20 | 26-897153 | SEAL, Oil Comment: (USE WITH 47-89980 IMPELLER) |
| 21 | 70977T | INSERT |
| 22 | 26-33613 | SEAL, WATER INTAKE TUBE |
| 23 | 32-34293 | TUBE, WATER INTAKE |
| 24 | 28-8M0032835 | KEY, IMPELLER DRIVE |
| 25 | 47-89980 | IMPELLER Comment: (MOLDED 47-89980 - .438 I.D.) |
| 26 | 46895 | FACE PLATE, WATER PUMP |
| 27 | 93224A1 | COVER ASSEMBLY, Water Pump |
| 28 | 26-36558 | SEAL, WATER PUMP COVER |
| 29 | 23-13127 | BEARING, NYLON - WATER PUMP COVER |
| 30 | 26-30913 | SEAL, Oil, WATER PUMP COVER |
| 31 | 12-20533 | WASHER, WATER PUMP STUDS |
| 32 | 11-8267089 | NUT, (.250-28), WATER PUMP STUDS |
| 33 | 25-30526 | RING, RUBBER |
| 34 | 23-31792T | SLEEVE, GUIDE - WATER INLET TUBE |
| 35 | 25-62704 | O-RING, (.362 x .103), DRIVE SHAFT Comment: SN# USA-5306001/Aus-8060795/Bel-9227031/Can-7134413 & Up |
▶GEAR HOUSING(PROPELLER SHAFT) (37 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| - | 27-89014A80 | GASKET SET |
| 1 | 1630-7360A11 | GEAR HOUSING ASSEMBLY |
| 36 | 10-79953Q04 | SCREW, (.375-16 x .250), GREASE FILLER HOLE |
| 37 | 12-191833 | WASHER, GREASE FILLER HOLE SCREW |
| 38 | 10-28653 | SCREW, (#10-32 x 0.25), VENT HOLE |
| 39 | 19643 | WASHER, VENT HOLE SCREW |
| 40 | 71658A1 | SHIFT SHAFT ASSEMBLY Comment: (LONG SHAFT) |
| 41 | 53-22899 | RING, Retaining, SHIFT SHAFT |
| 42 | 23-30676A1 | BUSHING ASSEMBLY, SHIFT SHAFT |
| 43 | 25-26802 | O-RING, (.424 x .103), SHIFT SHAFT BUSHING |
| 44 | 26-30696 | SEAL, Oil, SHIFT SHAFT BUSHING |
| 45 | 10-39149 | SCREW, (#10-24 x .500), SHIFT SHAFT BUSHING |
| 46 | 44434 | CAM, SHIFT |
| 47 | 15-30522A1 | SHIM ASSEMBLY, BALL BEARING (.002-3-5-10) |
| 48 | 30-21889 | BEARING, Ball, FOWARD GEAR |
| 49 | 43-48577A3 | GEAR ASSEMBLY, Forward |
| 50 | 31-22458 | BEARING, Roller, FORWARD GEAR |
| 51 | 52-63314 | RATCHET, SLIDING CLUTCH |
| 52 | 17-30535 | PIN, Cross, RATCHET TO PROPELLER SHAFT |
| 53 | 53-32449 | RING, Retaining, CROSS PIN |
| 54 | 31334 | FOLLOWER, SHIFT CAM |
| 55 | 24-76298 | SPRING, COMPRESSION - CAM FOLLOWER |
| 56 | 44-75667A2 | PROELLER SHAFT ASSEMBLY |
| 57 | 43-63316 | GEAR, Reverse |
| 58 | 15-30532A1 | SHIM ASSEMBLY, THRUST WASHER (.002-3-5-10) |
| 59 | 71479 | SLEEVE, THRUST - REVERSE GEAR |
| 60 | 30-21889 | BEARING, Ball, REVERSE GEAR |
| 61 | 25-30529 | O-RING, (1.925 x .103), BEARING CARRIER |
| 62 | 72673T1 | CARRIER ASSEMBLY, Bearing |
| 63 | 31-22458 | BEARING, Roller, BEARING CARRIER |
| 64 | 26-66022 | SEAL, Oil, BEARING CARRIER |
| 65 | 86236 | COVER, GEAR HOUSING |
| 66 | 86665A1 | COLLAR, PROPELLER GUIDE |
| 67 | 48-47922A10 | PROBPELLER Comment: (9" DIA., 10" PITCH, 2 BLADES, ALMINUM) |
| 68 | 11-64075A1 | SPACER, PROPELLER SHAFT |
| 69 | 12-79552 | WASHER, (.453 x .750 x .062) Stainless Steel, PROPELLER SHAFT Comment: SN# USA-5524659/Aus-8063634/Bel-9246205/Can-7143037 & Below |
| 70 | 11-64075A1 | NUT, PROPELLER Comment: SN# USA-5524660/Aus-8063635/Bel-9246206/Can-7143038 & Up |
▶MISCELLANEOUS PARTS AND ACCESSORIES (1 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| - | 27-89014A80 | GASKET SET (MOTOR OVERHAUL) |
▶STEERING HANDLE AND THROTTLE LINKAGE (29 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| - | 77194A2 | HANDLE ASSEMBLY, Steering |
| 1 | 60854 | GRIP, HANDLE |
| 2 | 77237 | CAP, HANDLE |
| 3 | 77238A1 | HANDLE, THROTTLE SHAFT |
| 4 | 17-31656 | PIN, STEERING HANDLE |
| 5 | 12-62252 | WASHER Comment: THROTTLE HANDLE TO STEERING ARM |
| 6 | 77194 | ARM, STEERING HANDLE |
| 7 | 973791 | SHAFT, Throttle Comment: (180 cc SailPower) |
| 8 | 77203 | BLOCK, CABLE GUIDE |
| 9 | 10-69069 | SCREW, (.250-28 x .750), BLOCK TO STEERING ARM |
| 10 | 86210 | CABLE, THROTTLE |
| 11 | 12-37998 | WASHER, THROTTLE CABLE |
| 12 | 11-21825 | NUT, (.250-28), THROTTLE CABLE |
| 13 | 48003 | PIVOT, STEERING HANDLE TO BRACKET |
| 14 | 15-48002015 | SHIM (.015) |
| 15 | 10-96138 | SCREW, (.250-28 x .620) |
| 16 | 96432F1 | BRACKET, STEERING ARM |
| 17 | 25-67272 | GROMMET, STEERING ARM BRACKET |
| 18 | 10-62233 | SCREW, (#10-16 x .625) |
| 19 | 12-30164 | WASHER, (.192 x .375 x .0312) Stainless Steel, DETENT SPRING |
| 20 | 24-72847 | SPRING, DETENT - STEERING HANDLE |
| 21 | 86212 | FOLLOWER, OVER - SPEED LIMITER |
| 22 | 10-20653 | SCREW, (.250-28 x 1.00) |
| 23 | 12-8M0204649 | WASHER, (.281 x .500 x .060) Stainless Steel, SPEED LIMITER FOLLOWER SCREW |
| 24 | 23-63320 | BUSHING, SPEED LIMITER FOLLOWER SCREW |
| 25 | 24-39042 | SPRING, NEUTRAL SPEED LIMITER FOLLOWER |
| 26 | 66374A2 | LEVER ASSEMBLY, THROTTLE CONTROL |
| 27 | 17-76207 | PIN, Roll, THROTTLE CONTROL LEVER |
| 28 | 86070 | SPOOL, THROTTLE |
▶SWIVEL BRACKET ASSEMBLY (29 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| 1 | 1471-7324A1 | SWIVEL BRACKET ASSEMBLY |
| 2 | 22-8M0169589 | FITTING, Grease, SWIVEL BRACKET |
| 3 | 23-64028 | BUSHING, SWIVEL BRACKET |
| 4 | 77334 | PLATE, CO-PILOT |
| 5 | 10-78038 | SCREW, (.250-20 x 1.75), CO-PILOT PLATE, TO SADDLE |
| 6 | 72845A1 | PLATE ASSEMBLY, CLAMP - CO-PILOT |
| 7 | 20203 | DISC, FRICTION |
| 8 | 10-36154 | SCREW, (.250-28 x 1.380), CLAMP PLATE ADJUSTING |
| 9 | 12-35462 | WASHER, (.2656 x .625 x .0625) Stainless Steel, CLAMP PLATE ADJUSTING SCREW |
| 10 | 17-25319 | PIN, (.125 x 0.75 Inches), SPRING GUIDE |
| 11 | 879841 | LEVER ASSEMBLY Comment: 180 CC SAILPOWER |
| 12 | 10-41433 | SCREW, (.250-28 x 1.00), TILT STOP LEVER |
| 13 | 13-31030 | WAVE WASHER, LEVER ANCHOR SCREW |
| 14 | 11-8267089 | NUT, (.250-28), TILT STOP LEVER SCREW |
| 15 | 72794 | STOP, REVERSE LOCK |
| 16 | 10-71056 | SCREW, (.250-28 x .560), REVERSE STOP TO SWIVEL BRACKET |
| 17 | 13-26992 | LOCKWASHER, (.250) Stainless Steel, REVERSE STOP SCREW |
| 18 | 12-71055 | WASHER, REVERSE STOP SCREW |
| 19 | 63554 | GUIDE, SPRING |
| 20 | 79744 | LEVER, CONTROL - TROLL BRACKET |
| 21 | 13-63631 | WAVE WASHER, TROLL BRACKET LEVER |
| 22 | 71419 | ROD, REVERSE LOCK TO SWITCH BRACKET |
| 23 | 23-26841 | BUSHING, NYLON - REVERSE LOCK LEVER ROD |
| 24 | 18-45882 | COTTER PIN, REVERSE LOCK LEVER TO ROD |
| 25 | 63628T | LEVER, REVERSE LOCK |
| 26 | 61007 | RETAINER, ROD - REVERSE LOCK |
| 27 | 63559T | BRACKET, TROLL |
| 28 | 24-63630 | SPRING, EXTENSION - TROLL BRACKET |
| 29 | 66559 | TUBE, SWIVEL BRACKET TO SADDLE |
▶TOP COWL AND STARTER ASSEMBLY (47 parts)
| Ref | OEM Part # | Part Name |
|---|---|---|
| 1 | 2160-7264A10 | TOP COWL ASSEMBLY |
| 2 | 654893 | SEAL, TOP COWL (16-1/2") |
| 3 | 66942 | BLANKET, SOUND - TOP EARLY STYLE ENGINE |
| 4 | 85544 | BLANKET, SOUND - SIDE EARLY STYLE ENGINE |
| 5 | 69522 | BLANKET, SOUND - FRONT EARLY STYLE ENGINE |
| 6 | 25-39086 | GROMMET, COWL LATCH - TOP COWL |
| 7 | 71502 | COVER, FRONT |
| 8 | 11-65517 | NUT, SPEED - FRONT COVER TO TOP COWL |
| 9 | 69346 | BUMPER, COWL - REAR |
| 10 | 17-72856 | PIN, TOP COWL CATCH |
| 11 | 12-98500 | WASHER, TOP COWL CATCH (LOWER) |
| 12 | 24-79351 | SPRING, COMPRESSION -- COWL CATCH |
| 13 | 12-65567 | WASHER, (.265 x .750 x .048) Stainless Steel, TOP COWL CATCH (UPPER) |
| 14 | 11-8M0207775 | NUT, (1/4-28X7/32), COWL CATCH TO TOP COWL |
| 15 | 91871A1 | HOUSING ASSEMBLY, Starter |
| 16 | 58657 | ROPE GUIDE (PLASTIC) |
| 17 | 53-72168 | RING, RETAINING - ROPE GUIDE (PLASTIC) |
| 18 | 654991 | SEAL, STARTER HOUSING TO TOP COWL |
| 19 | 10-72862 | SCREW, (.250-28 x 1.00), STARTER HOUSING TO CRANKCASE |
| 20 | 93695 | PULLEY, STARTER CABLE |
| 21 | 10-28789 | SCREW, (.190-24 x .750), CABLE PULLERY |
| 22 | 12-22887 | WASHER, CABLE PULLEY SCREW |
| 23 | 23-309772 | SPACER, CABLE PULLEY |
| 24 | 14-20165 | TAB WASHER, SHEAVE SHAFT NUT |
| 25 | 11-20166 | NUT, SHEAVE SHAFT (LEFT HAND THREAD) |
| 26 | 20155 | RETAINER, STARTER SPRING |
| 27 | 24-29340T02 | SPRING, STARTER REWIND |
| 28 | 23-28912 | BUSHING, STARTER SPRING GUIDE |
| 29 | 50-93696A2 | SHEAVE ASSEMBLY, Starter |
| 30 | 17-22896 | PIN, RETAINER - STARTER CABLE |
| 31 | 74359 | SHAFT, INTERLOCK |
| 32 | 74353 | LEVER, LOCK |
| 33 | 74351 | LEVER, FOLLOWER |
| 34 | 17-38489 | PIN, Roll, INTERLOCK SHAFT |
| 35 | 23-26856 | BUSHING, NYLON - INTERLOCK SHAFT |
| 36 | 24-74347 | SPRING, TORSION - INTERLOCK SHAFT |
| 37 | 13-36206 | WAVE WASHER, STARTER PAWL |
| 38 | 30596 | PAWL, STARTER |
| 39 | 23-28919 | BUSHING, NYLON - SHEAVE SHAFT SPACER |
| 40 | 23-61005 | SPACER, SHEAVE SHAFT |
| 41 | 26179 | RETAINER, SHEAVE SHAFT TO STARTER SHEAVE |
| 42 | 12-35559 | WASHER, SHEAVE SHAFT RETAINER |
| 43 | 13-20160 | WAVE WASHER, RETAINER TENSION |
| 44 | 30595 | PLATE, RETAINER - STARTER PAWL |
| 45 | 35558 | SHAFT, Sheave |
| 46 | 50-12066Q10 | CABLE ASSEMBLY, Starter |
| 47 | 79470A1 | RETAINER KIT, Rope |
100-Hour / Annual Service Checklist
Regular maintenance keeps your Mercury 9.8 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.