Mercury XR10 (0D038000 THRU 0D279998) Parts & Diagrams

🔎 Mercury XR10 Reference Library — Exploded parts diagrams (20 diagrams), specifications, common issues, and maintenance checklist.

The Mercury XR10 is a 4-Stroke, Inline 3-Cylinder, EFI outboard motor. Commonly used on jon boats, pontoons, and mid-size utility craft.

Quick Reference Specifications

Specification	Value
Engine Type	4-Stroke, Inline 3-Cylinder, EFI
Horsepower	25 HP
Displacement	526 cc
Bore x Stroke	61 mm x 57 mm
Spark Plug (Type & Gap)	NGK BKR6E
Engine Oil Capacity	1.8 L (1.9 quart)
Recommended Engine Oil	SAE 25W-40 Synthetic Blend Mercury FC-W
Gear Case Oil Capacity	280-350 mL (9.5-12 fl oz)
Idle Speed (in gear)	700 ± 50 RPM (in gear)
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 XR10:

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 XR10.

▶Carburetor Assembly(SeaPro/Marathon 10) (35 parts)

Ref	OEM Part #	Part Name
-	19072T88	POWERHEAD ASSEMBLY, Complete
1	1392-817404T4	CARBURETOR (WMC-40)
2	1395-823716	VALVE, Throttle (WMC-40)
3	19267	SHAFT, Throttle (INCLS. SCREW & SPRING)
4	1395-811353	BOWL, Fuel
4A	1395-811360	SCREW, Bowl Drain (WMC-40)
5	1395-91691	FLOAT
5A	F10064	SHAFT
6	1395-803861	VALVE
7	1399-4216	JET, (.064) (WMC-40)
8	1395-9171	PLUG, JET RETAINER
9	1395-811352	LEVER, Throttle
10	1395-8113541	SHAFT, Choke (WMC-40)
11	15827A1	BODY
12	1395-9643	SCREW, FUEL PUMP COVER
13	1395-9699	PLATE, COVER
14	1395-9696	SCREW, COVER PLATE
15	1395-97611	GASKET SET, Carburetor, GASKET/DIAPHRAGM KIT
16	1395-8237072	REPAIR KIT (WMC-40)
17	1395-9637	COVER, FUEL PUMP
18	1395-811806	VALVE, Choke (WMC-33A/40)
19	27-192061	GASKET, Carburetor
20	1395-9635	DIAPHRAGM/GASKET
21	1395-811805	LEVER, Choke (WMC-33A/40)
23	17442	COVER
24	19-47579	PLUG
25	10-40056110	SCREW, (M5 x 30)
26	41750T	INSERT
27	817424	KNOB, Choke
28	12804A1	BEZEL ASSEMBLY, Choke
29	53-11278	CLIP, Retaining
30	817426	INSERT, Choke Bezel
31	817425	LINK, Choke
32	10-40056110	SCREW, (M5 x 30)
33	11-400211	NUT, (M5) Stainless Steel

▶Carburetor Assembly(XR10/Magnum 10) (39 parts)

Ref	OEM Part #	Part Name
-	27-42364A92	GASKET SET, Engine
1	1392-8846A24	CARBURETOR
2	815133	VALVE, Throttle
3	813022	SHAFT, Throttle (INCLS. SCREW & SPRING)
4	1395-9164	BOWL, Fuel
5	1395-91691	FLOAT
6	1395-803861	VALVE
7	1395-6359	JET, (.052)
8	1395-9171	PLUG, JET RETAINER
9	813618	COVER, DIAPHRAGM
10	1395-9697	SCREW, DIAPHRAGM COVER
11	15827A1	BODY
12	1395-9643	SCREW, FUEL PUMP COVER
13	1395-9699	PLATE, COVER
14	1395-9696	SCREW, FUEL PUMP COVER
15	1395-97611	GASKET/DIAPHRAGM KIT
16	1395-8237072	REPAIR KIT
17	1395-9637	COVER, FUEL PUMP
18	1395-9762	PLUG
19	27-192061	GASKET, Carburetor
20	1395-9635	DIAPHRAGM/GASKET
21	128053	LEVER, Fast Idle
22	12803	BRACKET, Primer
23	11-821979	PUSH NUT
24	10-12110	SCREW, (#6-32 x .750)
25	24-11277	SPRING, Tension
26	10-400018	SCREW, (M5 x 12)
27	10-79965	SCREW, (#8-32 x .500) Stainless Steel
28	112731	LEVER, Primer
29	11280	CAM BLOCK
30	53-11278	CLIP, Retaining
31	12804A1	BEZEL ASSEMBLY, Choke
32	128022	PRIMER KNOB
33	10-40056110	SCREW, (M5 x 30)
34	11-400211	NUT, (M5) Stainless Steel
35	17442	COVER (Use where Applicable)
36	19-47579	PLUG (Use where Applicable)
37	445541	IDLE WIRE
38	37-129701	DECAL (SLOW/FAST)

▶Clamp Bracket (23 parts)

Ref	OEM Part #	Part Name
1	3404-8894A12	CLAMP BRACKET ASSEMBLY (PORT) GRAY
2	3403-8892A4	CLAMP BRACKET ASSEMBLY (STARBOARD) GRAY
3	10-92767A3	THUMB SCREW ASSEMBLY, (16 mm)
4	12-73719	WASHER
5	10-768042	SCREW
6	23-8M0084719	SPACER Comment: (Screw Assembly)
7	16-42129	STUD Comment: (Stud Assembly)
7A	10-4000333	SCREW, (M6 x 40) Comment: (Screw Assembly)
8	13-400256	LOCKWASHER, (M6) Comment: (Stud Assembly)
9	11-400212	NUT, (M6) Stainless Steel Comment: (Stud Assembly)
10	42078	TILT TUBE
11	54-8M0085928	CLIP
12	11-93164	NUT, (.875)
13	12-71421	WASHER, Nylon
14	42390A1	LEVER ASSEMBLY, Tilt Return
15	90901	STRAP, TILT STOP-PORT SIDE
16	10-42498	SCREW, (M6 x 1.0)
17	13-31030	WAVE WASHER
18	10-43216	BOLT, (.250-20 x 3.50)
19	12-67983	WASHER
20	11-8267118	NUT, (.250-20)
21	814427	SHUTTLE
22	37-12869	DECAL, Tilt Position

▶Cowls (19 parts)

Ref	OEM Part #	Part Name
1	2191-8M0094069	TOP COWL ASSEMBLY Comment: (Gray)
2	444621	SEAL
3	13691A02	SOUND BLANKET KIT
4	16471A1	LATCH, Cowl (W/O ROLLER-SEE REF #4)
5	817104A3	LATCH ASSEMBLY, Cowl (W/ROLLER-SEE REF.#5)
6	180402	LATCH HOOK
7	12873T	SHIELD, REAR Comment: (Gray)
8	10-400018	SCREW, (M5 x 12), REAR SHIELD
9	2192-9204A2	BOTTOM COWL (MARATHON 10)
9A	15061001	PLUG
10	12154	PLUG, BOTTOM COWL
11	87-11083A6	SWITCH ASSEMBLY, Stop
12	15920Q54	LANYARD ASSEMBLY
13	8M0032846	RETAINER, Brass, STOP SWITCH
14	44461A1	LEVER, Cowl Latch
15	23-76470	BUSHING, COWL LATCH LEVER
16	11394	SPACER, LATCH
17	10-40019131	SCREW, (M6 x 35), LATCH AND LEVER
18	13-69708	WAVE WASHER, LATCH AND LEVER SCREW

▶Crankshaft, Pistons and Flywheel (25 parts)

Ref	OEM Part #	Part Name
-	19072T88	POWERHEAD ASSEMBLY, Complete
1	42691	SHAFT, FLYWHEEL
1A	11-818591	NUT, (M14)
2	260-859231T19	FLYWHEEL ASSEMBLY Comment: (Use with Nut)
3	17794A1	BEARING
4	26-818901	SEAL, MAIN BEARING
5	400-8M0083309	CRANKSHAFT ASSEMBLY
6	818630A1	SLEEVE
7	30-41341	BEARING, Ball, CRANKSHAFT-LOWER
8	53-20940	RING, Snap, BALL BEARING (SMALL)(OLD DESIGN)
9	53-42132	RING, Retaining, BALL BEARING
10	12-13031	WASHER, LOWER
11	26-125661	SEAL, Oil - Lower, CRANKSHAFT
12	28-20094	KEY, Woodruff, FLYWHEEL DRIVE
13	31-878158	BEARING, Roller, CRANKSHAFT-UPPER
14	26-125671	SEAL, Oil - Upper, CRANKSHAFT
15	637-8477A2	CONNECTING ROD ASSEMBLY
16	10-823460	SCREW, (M5 x 16), CONNECTING ROD
17	31-42076A1	BEARING ASSEMBLY, Roller
18	29-42186	BEARING, Needle, PISTON END
19	12-8M0012297	BEARING, Thrust
20	784-9747A4	PISTON ASSEMBLY (.015 O.S.)
21	39-18212A1	RING SET, Piston (.015 O.S.)
22	40-42202	LOCK RING
23	12-824451	WASHER, (.610 Inside Diamter x .890 Outside Diameter x .062)

▶Cylinder Block and Covers (43 parts)

Ref	OEM Part #	Part Name
-	19072T88	POWERHEAD ASSEMBLY, Complete
1	881-9727T2	CYLINDER BLOCK
2	17-85171	PIN, Dowel, CYLINDER BLOCK
3	16-424632	STUD, CARBURETOR
4	21-426982	CHECK VALVE, BLEED HOSE
5	32-99130100	HOSE, BLEED
6	16-8161949	STUD, CYLINDER BLOCK
7	10-421251	SCREW, (M8 x 55), CRANKCASE TO CYLINDER BLOCK
7A	17-17866	PIN, Groove
8	11-401386	NUT, (M6), CYLINDER BLOCK STUD
9	27-191861	GASKET, Powerhead
10	828435A3	REED BLOCK ASSEMBLY
11	21-42657A3	CHECK VALVE
12	26-42137	SEAL, REED BLOCK
13	27-195982	GASKET, REED BLOCK
14	10-4000171	SCREW, (M6 x 16), REED BLOCK
15	34-825141	REED
16	179031	STOP, Reed
17	10-4005764	SCREW, (M3.5 x 8), REED ATTACHING
18	11-400213	NUT, (M8) Stainless Steel, CARBURETOR STUD
19	8M0048005	COVER, EXHAUST
20	10-40062129	SCREW, (M6 x 25), EXHAUST COVER TO CYLINDER BLOCK
21	27-19185	GASKET, EXHAUST COVER
22	42365	PLATE, Baffle
23	27-19184	GASKET, BAFFLE PLATE
24	17863A1	COVER ASSEMBLY, Intake Comment: (Fitting is Installed in Intake Cover)
25	22-15133	FITTING Comment: (Fitting is Installed in Intake Cover)
26	32-99130100	HOSE
27	22-59169003	FITTING
28	56762	TIE STRAP, (4.00 Inches)
29	27-192031	GASKET, INTAKE COVER
30	10-40062129	SCREW, (M6 x 25), COVER TO CYLINDER BLOCK
31	32-8M0108355	LINE, (57.00 Inches Bulk), TELL TALE
32	22-94848	FITTING, TELL TALE HOSE-BOTTON COWL
33	1033-8906A02	COVER ASSEMBLY
34	27-19207002	GASKET
35	8M0039352	COVER, THERMOSTAT
36	27-19205002	GASKET
37	10-40062129	SCREW, (M6 x 25)
38	14586	THERMOSTAT (120 Degree)
39	27-8M0204714	GASKET, THERMOSTAT
40	22-291112	CONNECTOR (STRAIGHT)
41	10-40062129	SCREW, (M6 x 25), COVER ATTACHING

▶Driveshaft Housing (18 parts)

Ref	OEM Part #	Part Name
-	27-42364A92	GASKET SET, Engine
1	1597-822155A2	HOUSING ASSEMBLY (LONG) GRAY
2	27-195992	GASKET, Driveshaft Housing
3	8M0039074	MOUNT
4	42374F5	COVER, Mount Comment: (Gray)
5	10-4009238	SCREW, (M6 x 80), MOUNT COVER
6	13-400256	LOCKWASHER, (M6), COVER SCREW
7	11-400212	NUT, (M6) Stainless Steel, COVER SCREW
8	10-40011131	SCREW, (M6 x 35) Stainless Steel, DRIVE SHAFT HOUSING TO PLATE
9	41344A3	ADAPTOR PLATE ASSEMBLY (1-1/8"I.D.TUBE) Comment: (SEA PRO 10/MARATHON 10)
10	26-11287001	SEAL, Adapter Plate
11	32-42122	TUBE, Water (LONG)
12	42371	HOLDER, WATER TUBE
13	27-192012	GASKET
14	26-42380001	SEAL
15	23-42465	SPACER, WATER TUBE
16	10-400035	SCREW, (M5 x 16), HOUSING TO ADAPTOR PLATE
17	445551	BLOCK, Bearing (LONG)

▶Fuel Filter Assembly (10 parts)

Ref	OEM Part #	Part Name
1	35-889527A07	FILTER ASSEMBLY, Fuel
2	858731	BALL, FUEL FILTER
3	35-87946Q04	FILTER ASSEMBLY
4	25-897536	SEAL, FUEL FILTER
5	32-8M0108355	LINE, (57.00 Inches Bulk), FILTER TO CARBRETOR
6	32-8M0108355	LINE, (57.00 Inches Bulk), FILTER TO ADAPTOR
7	54-816311T	TIE STRAP, (8.00 Inches), FUEL LINE
8	25-18202	GROMMET
9	22-15781A9	CONNECTOR KIT, Fuel
10	10-8M0204707	SCREW, (M6 x 25), ADAPTOR

▶Gear Hsg(Driveshaft)(Design I-Refer to Reference #17) (41 parts)

Ref	OEM Part #	Part Name
-	46-42089A5	PUMP KIT, Water
1	1666-8833A4	GEAR HOUSING ASSEMBLY Comment: (Gray)
2	23-12009	BUSHING, (.31 x .45 x .50), GEAR HOUSING
3	22-8M0058389	SCREW, Magnetic
4	12-191833	WASHER
5	42086A1	SLEEVE KIT
6	23-41345	SLEEVE
7	23-42191001	SLEEVE
8	10-79953Q04	SCREW, (.375-16 x .250)
9	12-191833	WASHER, Fiber
10	35-421991	SCREEN
11	10-13954	SCREW, (.250-14 x .88)
12	97-42121Q02	ANODE ASSEMBLY
13	10-13954	SCREW, (.250-14 x .88)
14	26-42133	SEAL
15	43-420411	GEAR, Pinion
16	12-41369	WASHER, THRUST
17	45-12367	DRIVESHAFT (X-LONG)
18	46-42040T5	BASE ASSEMBLY, Water Pump
19	27-192043	GASKET (SEE DESIGN II DRAWING)
20	26-33613	SEAL
21	42375	RETAINER
22	10-48408	SCREW, (#10-16 x .500)
23	25-822236	QUAD RING
24	26-413651	SEAL, Oil
25	27-19202001	GASKET, Water Pump Plate
26	32-42185A1	TUBE ASSEMBLY, Water
27	42200	FACE PLATE
28	46-42089A2	COVER ASSEMBLY
29	26-421021	SEAL
30	47-42038Q02	IMPELLER
31	28-8M0173458	KEY ASSEMBLY
32	44467	GUIDE
33	10-4000331	SCREW, (M6 x 30), WATER PUMP
34	12-8M0204649	WASHER, (.281 x .500 x .060) Stainless Steel
35	42039	CAM, SHIFT
36	8M0026065	SHIFT SHAFT (LONG)
37	53-42389	E RING
38	8M0036770	GUIDE
39	10-40011109	SCREW, (M5 x 25)
40	11-401385	NUT, (M5), GUIDE SCREW

▶Gear Hsg(Driveshaft)(Design II-Refer to Reference #41) (43 parts)

Ref	OEM Part #	Part Name
-	46-42089A5	PUMP KIT, Water
1	1666-8833A18	GEAR HOUSING ASSEMBLY, Basic-Gray Comment: (Gray)
2	23-12009	BUSHING, (.31 x .45 x .50), GEAR HOUSING
3	22-8M0058389	SCREW
4	25-8M0204684	O-RING, Rubber
5	822244A1	SLEEVE ASSEMBLY
6	23-823944	SLEEVE
7	23-823943	BUSHING
8	10-79953Q04	SCREW KIT
9	25-8M0204684	O-RING, Rubber
10	35-421991	SCREEN
11	10-13954	SCREW, (.250-14 x .88)
12	97-42121Q02	ANODE ASSEMBLY
13	10-13954	SCREW, (.250-14 x .88)
14	26-42133	SEAL
15	43-8219251	GEAR, Pinion - 13-26
16	12-41369	WASHER, THRUST
17	31-22756	BEARING, Roller
18	46-42040T5	BASE ASSEMBLY, Water Pump
19	27-192043	GASKET
20	26-33613	SEAL
21	42375	RETAINER
22	10-48408	SCREW, (#10-16 x .500)
23	25-822236	QUAD RING
24	26-413651	SEAL, Oil
25	27-19202001	GASKET, Water Pump Plate
26	32-42185A1	TUBE ASSEMBLY, Water
27	42200	FACE PLATE
28	46-42089A2	COVER ASSEMBLY
29	26-421021	SEAL
30	47-42038Q02	IMPELLER
31	28-8M0173458	KEY ASSEMBLY
32	44467	GUIDE
33	10-4000331	SCREW, (M6 x 30), WATER PUMP
34	12-8M0204649	WASHER, (.281 x .500 x .060) Stainless Steel
35	42039	CAM, SHIFT
36	8M0026065	SHIFT SHAFT (LONG)
37	53-42389	E RING
38	8M0036770	GUIDE
39	10-40011109	SCREW, (M5 x 25)
40	11-401385	NUT, (M5), GUIDE SCREW
41	45-823390	DRIVESHAFT (LONG)
42	12-822248	THRUST WASHER

▶Gear Hsg(Propshaft)(Design I-Refer to Driveshaft Drawing) (23 parts)

Ref	OEM Part #	Part Name
-	26-41365A3	SEAL KIT
1	1666-8833A4	GEAR HOUSING ASSEMBLY Comment: (Gray)
41	10-82407110	SCREW
42	10-8240717	SCREW, (M8 x 30)
43	31-821321A1	BEARING ASSEMBLY, Roller
44	43-41371A1	GEAR ASSEMBLY, Forward
45	23-41367	BUSHING
46	813139	FOLLOWER, Cam
47	53-32449	RING, Retaining
48	52-43217	CLUTCH
49	17-30535	PIN, Cross
50	24-42204	SPRING
51	44-41370	PROPELLER SHAFT
52	43-44115T	GEAR, Reverse
53	42144T2	CARRIER ASSEMBLY, Bearing
54	25-8M0214923	O-RING, (1.984 x .139)
55	23-41368	BUSHING
56	26-66022	SEAL, Oil
57	42037	THRUST HUB
58	42201	CAP
59	48-828152A12	PROPELLER (9-1/4X7)
60	23-420911	SPACER
61	11-40140	NUT, (M10)

▶Gear Hsg(Propshaft-Design II-Refer to Driveshaft Drawing) (23 parts)

Ref	OEM Part #	Part Name
-	26-41365A3	SEAL KIT
1	1666-8833A18	GEAR HOUSING ASSEMBLY, Basic-Gray Comment: (Gray)
43	31-821321A1	BEARING ASSEMBLY, Roller
44	43-821924A1	GEAR ASSEMBLY, Forward
45	23-41367	BUSHING
46	813139	FOLLOWER, Cam
47	52-821930A1	CLUTCH
48	17-823951	PIN, Cross
49	24-42204	SPRING
50	44-821929	PROPELLER SHAFT
51	43-821926T1	GEAR, Reverse - 13/26
52	42144T3	CARRIER ASSEMBLY, Bearing
53	25-8M0214923	O-RING, (1.984 x .139)
54	23-821927	BUSHING
55	26-99325	SEAL
56	26-821928	SEAL, Oil
57	10-82407110	SCREW
58	10-8240717	SCREW, (M8 x 30)
59	48-828150A12	PROPELLER (9.75 x 6.50)
60	23-420911	SPACER
61	11-40140	NUT, (M10)
62	821932	THRUST HUB
63	822559Q01	CUP, Reverse Exhaust Block

▶Ignition Components (22 parts)

Ref	OEM Part #	Part Name
1	86617A20	STATOR ASSEMBLY
2	10-4000120	SCREW, (M5 x 25)
3	10-400018	SCREW, (M5 x 12)
4	98450A10	TRIGGER ASSEMBLY
5	11100	CLIP
6	339-7452A19	SWITCHBOX ASSEMBLY
7	10-40019108	SCREW, (M5 x 20)
8	10-48408	SCREW, (#10-16 x .500)
9	339-832757A4	COIL ASSEMBLY, Ignition
10	10-40112	SCREW, (M6 x 45)
11	88173	TAB WASHER
12	23-88171	BUSHING, COIL
13	10-32,11-45076	NUT, Brass
14	84-813715A2	CABLE SET, High Tension (5 and 8.25 Inch)
15	85-63709A1	BOOT/TERMINAL KIT, SPARK PLUG
16	33-8M0114746	SPARK PLUG (NGK#BP8HS-15)
17	54-816311T	TIE STRAP, (8.00 Inches)
18	86704A10	STATOR ASSEMBLY
19	10-4000123	SCREW, (M5 x 30)
20	86-638131	TERMINAL BLOCK
21	10-48409	SCREW, (#10-16 x .625) Stainless Steel
22	10-62568	SCREW, (#10-16 x .375)

▶Manual Starter(Design I) (21 parts)

Ref	OEM Part #	Part Name
1	42207A1	HOUSING ASSEMBLY, STARTER
2	8M0183792	BUSHING, STARTER ROPE
3	53-818853	RING, Retaining
4	42194A2	SPRING ASSEMBLY, Recoil Starter
6	42171T	LEVER, LOCK (UPPER)
7	12-8M0204666	WASHER, (.203 x .500 x .032), UPPER LOCK LEVER
8	42173T	LEVER, LOCK (LOWER)
9	10-48408	SCREW, (#10-16 x .500), LOWER LOCK LEVER
10	23-43787	SPACER, STARTER HOUSING SCREW
11	10-8M0204741	SCREW, (M6 x 20) Stainless Steel, STARTER HOUSING ATTACHING
12	19018T	REST
15	12674	SUPPORT
16	10-40019111	SCREW, (M5 x 35)
17	23-309772	SPACER, REST SCREW
18	11-401385	NUT, (M5), REST SCREW
19	42034A2	SHEAVE, STARTER
20	19-817362	CAP, STARTER SHEAVE (CAP PLUG)
21	42209	TAB, STARTER SHEAVE
22	10-48408	SCREW, (#10-16 x .500), TAB
23	50-12066Q10	ROPE, STARTER
24	85174A1	HANDLE ASSEMBLY, STARTER ROPE

▶Manual Starter(Design II) (25 parts)

Ref	OEM Part #	Part Name
1	42207T02	HOUSING, Starter
2	8M0183792	BUSHING
3	53-818853	RING, Retaining
4	19018T	REST
5	12674	SUPPORT
6	10-40019111	SCREW, (M5 x 35)
7	23-309772	SPACER
8	11-401385	NUT, (M5)
9	42171T	LEVER, LOCK (UPPER)
10	12-8M0204666	WASHER, (.203 x .500 x .032)
11	42173T	LEVER, LOCK (LOWER)
12	10-48408	SCREW, (#10-16 x .500)
13	10-8M0204741	SCREW, (M6 x 20) Stainless Steel
14	23-43787	SPACER, STARTER HOUSING SCREW
15	24-86857T01	SPRING
16	42034T04	PULLEY, Starter
17	50-12066Q10	ROPE
18	85174A1	HANDLE ASSEMBLY
19	24-86851T02	SPRING
20	868501	CAM
21	53-86849T01	RING, Retaining
22	24-868523	SPRING
23	86853T01	CAM
24	10-826253	SCREW
25	833161T	PAD

▶Service/Support Material (1 parts)

Ref	OEM Part #	Part Name
-	90-816757930	OWNERS GUIDE (MARATHON 10)

▶Swivel Bracket and Steering Handle (36 parts)

Ref	OEM Part #	Part Name
1	42213A15	SWIVEL TUBE REPLACEMENT Comment: (Reference #6 is 1.125 Inch -12)
2	22-8M0169589	FITTING, Grease
3	44397A16	BRACKET ASSEMBLY Comment: (Gray)(Reference #6 is 1.125 Inch -12)
4	10-40011110	SCREW, (M5 x 30) Stainless Steel Comment: (Reference #6 is 1.125 Inch -12)
5	12-177821	WASHER Comment: (Reference #6 is 1.125 Inch -12)
6	11-816880	NUT Comment: (Reference #6 is 1.125 Inch -12)
7	23-817026	BUSHING Comment: (Reference #6 is 1.125 Inch -12)
8	422111	CABLE, THROTTLE (SIDE SHIFT)
9	11-400212	NUT, (M6) Stainless Steel, THROTTLE CABLE
10	99333A2	TUBE ASSEMBLY, STEERING
11	87-823609A10	HANDLE ASSEMBLY, Throttle (SIDE SHIFT)
12	37-140124	DECAL (INTERNATIONAL SYMBOLS)
13	10-37342	SCREW, (#12-14 x .375), THROTTLE HANDLE
14	87-823609A10	SWITCH KIT, Stop - Throttle Handle
15	11099A1	BOOT ASSEMBLY, STOP SWITCH
16	8M0221732	GRIP, RUBBER
17	3402-8831A14	SWIVEL BRACKET ASSEMBLY
18	22-8M0169589	FITTING, Grease
19	23-42140	BUSHING, UPPER
20	23-42080T01	BEARING, Thrust - Upper
21	23-42139	BUSHING, LOWER
22	26-42077	SEAL
23	12-42373	THRUST WASHER, LOWER
24	42124A1	PLATE ASSEMBLY, CO-PILOT
25	8M0075731	HOOK, REVERSE LOCK
26	24-42127	SPRING, REVERSE HOOK
27	42082T04	BRACKET
28	24-421301	SPRING
29	17-420811	PIN
30	53-13194	RING, Retaining
31	17-830741A1	PIN, Pivot
32	91963	WASHER, (.390 x .600 x .032), PIVOT PIN
33	24-42128	SPRING
35	975501	TUBE ASSEMBLY
36	817634	PLUG (SEA PRO/MARATHON 10)
37	25-12602002	GROMMET

▶Throttle and Shift Linkage(SeaPro/Marathon 10) (28 parts)

Ref	OEM Part #	Part Name
1	42181	BRACKET, Cable
2	10-4000171	SCREW, (M6 x 16)
3	42156	LEVER
4	42153	LEVER
5	39527	TUBE
6	39601	PLATE (OLD DESIGN)
7	10-400011	SCREW, (M5 x 8)
8	421571	SHIFT HANDLE
9	44459001	GROMMET
10	8155501	SHIFT SHAFT
11	10-40056107	SCREW, (M5 x 16)
12	12-4002314	WASHER
13	10-4000333	SCREW, (M6 x 40)
14	12-8M0214930	WASHER
15	23-421621	BUSHING
16	421662	ACTUATOR
17	24-42164	SPRING
18	24-13676	SPRING
19	13-69708	WAVE WASHER
20	421631	LEVER, Control
21	10-40019111	SCREW, (M5 x 35)
22	421671	TIMING LINK
23	421592	LEVER
24	24-42160	SPRING
25	23-421581	BUSHING
26	10-4000331	SCREW, (M6 x 30)
27	12-8M0214930	WASHER
28	42161	LINK INTERLOCK

▶Throttle and Shift Linkage(Side Shift Models) (32 parts)

Ref	OEM Part #	Part Name
1	42181	BRACKET, Cable
2	10-4000171	SCREW, (M6 x 16)
3	421592	LEVER
4	10-4000331	SCREW, (M6 x 30)
5	12-8M0214930	WASHER
6	23-421581	BUSHING
7	24-42160	SPRING
8	42156	LEVER
9	42153	LEVER
10	24-39627	SPRING
11	39601	PLATE (OLD DESIGN)
12	10-400011	SCREW, (M5 x 8)
13	42152	SHIFT SHAFT Comment: (2 Piece Shift Shaft)
14	421541	ACTUATOR Comment: (2 Piece Shift Shaft)
15	815550A1	SHIFT SHAFT (W/BALL SOCKET)
16	8155501	SHIFT SHAFT (W/O BALL SOCKET)
17	421571	SHIFT HANDLE (USSE W/REF.#16)
18	44459001	GROMMET
19	14-12003	TAB WASHER (OLD DESIGN)
20	421671	TIMING LINK
21	421631	LEVER, Control
22	10-40019111	SCREW, (M5 x 35)
23	421662	ACTUATOR
24	42161	LINK INTERLOCK
25	10-4000333	SCREW, (M6 x 40)
26	12-8M0214930	WASHER
27	23-421621	BUSHING
28	24-42164	SPRING
29	13-69708	WAVE WASHER
30	24-13676	SPRING
31	10-40056107	SCREW, (M5 x 16)
32	12-4002314	WASHER

▶Throttle and Shift Linkage(Tiller Handle Shift Models) (43 parts)

Ref	OEM Part #	Part Name
1	421482	CONTROL PLATFORM
2	94085A1	GEAR
3	10-4000331	SCREW, (M6 x 30)
4	12-8M0214930	WASHER
5	23-856737	SPACER (SHORT)
6	11-400212	NUT, (M6) Stainless Steel
8	42151	LEVER, Primary
9	10-4000333	SCREW, (M6 x 40)
10	23-856738	SPACER (LONG)
11	10-4000171	SCREW, (M6 x 16)
12	421671	TIMING LINK
13	421631	LEVER, Control
14	10-40019111	SCREW, (M5 x 35)
15	421662	ACTUATOR
16	42161	LINK INTERLOCK
17	10-4000333	SCREW, (M6 x 40)
18	12-8M0214930	WASHER
19	23-421621	BUSHING
20	24-42164	SPRING
21	13-69708	WAVE WASHER
22	24-13676	SPRING
23	8M0084745	LINK ASSEMBLY, Throttle
24	8M0084742	SOCKET
25	421592	LEVER
26	23-421581	BUSHING
27	24-42160	SPRING
28	10-4000331	SCREW, (M6 x 30)
29	12-8M0214930	WASHER
30	42156	LEVER
31	42153	LEVER
32	42152	SHIFT SHAFT Comment: (2 Piece Shaft)
33	421551	LEVER Comment: (2 Piece Shaft)
34	10-400035	SCREW, (M5 x 16) Comment: (2 Piece Shaft)
35	14-11371	TAB WASHER Comment: (2 Piece Shaft)
36	1938511	SHIFT LINK Comment: (2 Piece Shaft)
37	815550A1	SHIFT SHAFT Comment: (1 Piece Shaft)
38	93254	SWIVEL BASE Comment: (1 Piece Shaft)
39	93421	SWIVEL BALL Comment: (1 Piece Shaft)
41	8155501	SHIFT SHAFT Comment: (Use without Swivel Ball/Swivel Base)
42	815567T02	SHIFT LINK Comment: (Use without Swivel Ball/Swivel Base)
43	10-400011	SCREW, (M5 x 8)
44	24-39627	SPRING
45	39601	PLATE (Use where Applicable)

100-Hour / Annual Service Checklist

Regular maintenance keeps your Mercury XR10 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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