🔎 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.
