Mercury 9.8 (7127388 & 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.

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