Mercury 15 (4-STROKE) (0G590000 THRU 0G760299) Parts & Diagrams

OEM and aftermarket replacement parts for Mercury 15 (4-STROKE). Scroll down for exploded parts diagrams (28), specifications, and maintenance reference.

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Mercury 15 (4-STROKE) (0G590000 THRU 0G760299) Parts & Diagrams

🔎 Mercury 15 (4-STROKE) Reference Library — Exploded parts diagrams (28 diagrams), specifications, common issues, and maintenance checklist.

The Mercury 15 (4-STROKE) is a 4-Stroke, Inline 2-Cylinder, EFI, SOHC 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, SOHC
Horsepower 15 HP
Displacement 333 cc
Bore x Stroke 61 mm x 57 mm
Spark Plug (Type & Gap) NGK DCPR6E
Engine Oil Capacity 1.0 L (1 quart)
Recommended Engine Oil SAE 25W-40 Synthetic Blend Mercury FC-W
Gear Case Oil Capacity 200 mL (6.8 fl oz)
Idle Speed (in gear) 850 ± 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 15 (4-STROKE):

  • 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 15 (4-STROKE).

▶Accessories (1 parts) Accessories
Ref OEM Part # Part Name
0 87-856556A1 SWITCH KIT
▶Bottom Cowl (22 parts) Bottom Cowl
Ref OEM Part # Part Name
1 4000-835416A2 BOTTOM COWL Comment: (GRAY)
2 852480 LATCH HOOK
3 10-4006731 SCREW, (M6 x 16)
4 12-8M0214930 WASHER
5 23-826618 BUSHING
6 25-828129 GROMMET
7 12-69057 WASHER, (.281 x .734 x .063)
8 25-855289T GROMMET
9 827403 PLUG Comment: (NON-HANDLE)
10 825782F2 LEVER, Cowl Latch Comment: (GRAY)
11 10-1993735 SCREW, (M6 x 35 MM)
12 23-812707 BUSHING
13 13-12134 WASHER, Wave
14 22-8M0182334 CONNECTOR, Fuel - Brass
15 10-40011129 SCREW, (M6 x 25) Stainless Steel
16 25-18202 GROMMET
17 54-816311T TIE STRAP, (8.00 Inches)
18 32-9912878 HOSE, (.187) (26.00 Inches Bulk) (Cut to 21 IN.)
19 826037 PLUG
20 22-813613 FITTING
21 54-816311T TIE STRAP, (8.00 Inches)
22 37-111851 SHIFT DECAL Comment: (HANDLE)
▶Carburetor (35 parts) Carburetor
Ref OEM Part # Part Name
- 802706A1 REPAIR KIT, Carburetor
1 3323-835382T04 CARBURETOR
2 10-809571 SCREW, (M4 x 10)
3 8095721 COVER
4 809573 GASKET
5 10-8095781 SCREW, Throttle
6 24-8095791 SPRING
7 10-811248M SCREW, (M4 x 5)
8 802694 PLATE
9 10-8026921 SCREW, (M3 x 5)
10 45,8027011 PILOT JET,
11 19-802702 PLUG
12 802700 MAIN NOZZLE
13 25-11802M O-RING
14 104,802701 JET, Main
15 10-8095711 SCREW, (M4 x 5)
16 8095701 VALVE, Needle
17 809569 FLOAT
18 17-11794M PIN
19 27-802699 GASKET
20 35-802704 FILTER
21 802690T3 FLOAT BOWL ASSEMBLY
22 53-802693 RING, Retaining
23 802698 CAP
24 802697 SEAL
25 10-8095783 SCREW, Drain (M5 x 6)
26 27-802691 GASKET
27 802695 DIAPHRAGM
28 24-802696 SPRING
29 802705 COVER
30 10-802692 SCREW, (M4 x 8)
31 22-14183M PLUG, Drain (M4 x 5)
32 27-8026911 GASKET
33 10-81758M SCREW, (M4 x 12)
34 21-802703 CHECK VALVE
▶Clamp Bracket (35 parts) Clamp Bracket
Ref OEM Part # Part Name
1 1497-8796A8 BRACKET ASSEMBLY, Transom Comment: (STARBOARD)(GRAY)
2 1497-8794A10 BRACKET ASSEMBLY, Transom Comment: (PORT)(GRAY)
3 10-92767A3 THUMB SCREW ASSEMBLY, (16 mm)
4 NSS NOT SOLD SEPARATE, Rivet
5 NSS NOT SOLD SEPARATE, Handle
6 10-768042 SHOULDER SCREW, Hex
7 12-73719 WASHER
8 11-826709109 NUT, (.250-28)
9 11-93164 NUT, (.875)
10 10-4000333 SCREW, (M6 x 40)
11 41042 HANDLE
12 23-818538 SPACER
13 12-71421 WASHER, Nylon
14 8M0035075 TILT TUBE
15 12-71421 WASHER, Nylon
16 37-8237011 DECAL, Co-Pilot Comment: HANDLE MODELS
17 17-56373A2 PIN ASSEMBLY, Tilt
18 24-92995 SPRING
19 10-4000333 SCREW, (M6 x 40)
20 11-93164 NUT, (.875)
21 54-8M0085928 CLIP
22 10-814945 SCREW, (.312-18 x 3.500) Stainless Steel
23 12-67981 WASHER
24 11-815848 NUT, (.312)
25 11-826709109 NUT, (.250-28)
26 10-41523 SCREW, (.250-28 x 1.00)
27 96965 LEVER, STARBOARD SIDE
28 11-826709109 NUT, (.250-28)
29 24-44581 SPRING
30 10-41524 SCREW, (.250-28 x 1.75)
31 10-41524 SCREW, (.250-28 x 1.75)
32 13-31030 WAVE WASHER
33 11-826709109 NUT, (.250-28)
34 90901 STRAP, PORT SIDE
35 10-41523 SCREW, (.250-28 x 1.00)
▶Crankshaft, Pistons and Connecting Rods (16 parts) Crankshaft, Pistons and Connecting Rods
Ref OEM Part # Part Name
- 27-835427A00 GASKET SET, Powerhead
1 400-834957 CRANKSHAFT
2 26-855680 SEAL, Oil
3 26-855681 SEAL, Oil
4 31-83496020 BEARING Comment: (BLUE)
5 600-834961T1 CONNECTING ROD
6 10-850844 BOLT, (M7 x 38)
7 12-855682 WASHER
8 700-834963T PISTON
9 39-850846 RING, Piston
10 39-850847 RING, Piston
11 39-825839 RING, Oil
12 41-825713 PIN, Piston
13 53-82343M CLIP
14 28-8M0057164 KEY
15 28-8M0084803 KEY
▶Cylinder Block (47 parts) Cylinder Block
Ref OEM Part # Part Name
- 27-835427A00 GASKET SET, Powerhead
1 900-8M0055024 CYLINDER BLOCK
2 17-825689 PIN, Dowel
3 10-8M0101617 BOLT, (M8 x 55)
4 10-43092M BOLT, (M6 x 14)
5 22-822644 PIPE PLUG
6 27-834952002 GASKET
7 834953T02 COVER, Exhaust
8 22-83326M FITTING
9 855676003 THERMOSTAT, (60C/140F)
10 8M0188835 COVER
11 27-8M0177107 GASKET
12 10-82500930 BOLT, (M6 x 30)
13 8M0060022 HOSE
14 54-816311T TIE STRAP, (8.00 Inches)
15 32-8M0108355 HOSE, (57.00 Inches Bulk) (16 IN.)
16 35-8M0162832 FILTER ASSEMBLY, Oil
17 822625 NIPPLE, (M20)
18 NSS NOT SOLD SEPARATE, Plug-Serial Number
19 834974 BREATHER COVER
20 26-850850 SEAL
21 10-8257021 BOLT, (M6 x 20)
22 27-8354271 GASKET
23 855922A2 PLATE, Oil Deflection
24 10-40011151 SCREW, (M8 x 35) Stainless Steel
25 97-8M0099896 ANODE
26 25-855777 GROMMET
27 855776 COVER
28 10-855778 BOLT, (M5 x 12)
29 855779 PLATE
30 10-8257021 BOLT, (M6 x 20)
31 8533442 CABLE Comment: HANDLE
32 11-46335 NUT (.375) Comment: HANDLE
33 855732 BRACKET Comment: HANDLE
34 53-27290 RING, Retaining Comment: HANDLE
35 10-40011126 SCREW, (M6 x 13) Stainless Steel Comment: HANDLE
36 817428 SOCKET Comment: HANDLE
37 19-8354262 DIPSTICK
38 54-816311T TIE STRAP, (8.00 Inches)
39 22-8830591 PIPE JOINT
40 32-896122 HOSE
41 852484 SCREEN, Oil
42 54-28700 CLAMP Comment: ELECTRIC
43 10-82239312 SCREW, (M5 x 12) Comment: ELECTRIC
44 54-8556951 CLAMP
45 54-8556961 CLAMP
46 25-855690 GROMMET
▶Cyliner Head (16 parts) Cyliner Head
Ref OEM Part # Part Name
- 27-835427A00 GASKET SET, Powerhead
1 900-835430A1 CYLINDER HEAD ASSEMBLY
2 850835 GUIDE, Intake
3 53-825038 CIRCLIP
4 22-822644 PIPE PLUG
5 10-855677 BOLT, (M8 x 78)
6 17-825689 PIN, Dowel
7 10-893745025 SCREW, (M6 x 25)
8 27-8M0052705 GASKET
9 834954 COVER
10 850837 SEAL
11 10-8257021 BOLT, (M6 x 20)
12 33-827858Q SPARK PLUG, NGK-DPR6EA-9
13 859578A1 PLUG
14 25-8M0052669 O-RING
15 NSS NOT SOLD SEPARATE, Decal-Recomm. Eng. Oil/Valve Cle.
▶Driveshaft Housing (30 parts) Driveshaft Housing
Ref OEM Part # Part Name
1 1506-835409T2 HOUSING, Driveshaft Comment: (LONG)(GRAY)
2 856157T MOUNT, Upper Comment: (BIGFOOT)
3 10-8136911 SCREW, (M8 x .98)
4 826276 BUMPER
5 27-8M0204692 GASKET
6 8288181 PLUG, Drain
7 853577T COVER
8 27-854617 GASKET
9 10-4006731 SCREW, (M6 x 16)
10 26-827947 SEAL
11 32-855252 TUBE, Water Comment: (BIGFOOT)
12 26-8272411 SEAL
13 26-413651 SEAL, Oil
14 852432 SEAL
15 856179 BRACKET
16 856196 SLEEVE
17 850862F3 COVER Comment: (PORT)(GRAY)
18 850863F3 COVER Comment: (STARBOARD)(GRAY)
19 10-814776 SCREW, Adjusting (M6 x 55)
20 11-401386 NUT, (M6)
21 8224211 BUMPER
22 25-855299 GROMMET
23 853963F2 ADAPTOR Comment: (GRAY)
24 23-12009 BUSHING, (.31 x .45 x .50) Comment: BIGFOOT
25 10-82407110 SCREW, (M8 x 50) Comment: BIGFOOT
26 10-8240717 SCREW, (M8 x 30) Comment: BIGFOOT
27 825578A1 RELIEF VALVE ASSEMBLY
28 25-825579 O-RING
29 17-82364M PIN, Dowel
30 22-68307 PLUG
▶Electrical Components (48 parts) Electrical Components
Ref OEM Part # Part Name
- 802733A98 POWERHEAD ASSEMBLY
1 835403T BRACKET Comment: (MANUAL)
2 54-855686 CLAMP
3 10-855810 BOLT, (M6 x 20)
4 10-8248326 BOLT, (M6 x 25)
5 12-855811 WASHER
6 25-97687M GROMMET
7 23-852473 COLLAR
8 854650T2 RECTIFIER/REGULATOR ASSEMBLY Comment: ELECTRIC
9 10-811188T BOLT, (M6 x 16) Comment: ELECTRIC
10 13540 CAP, Female Comment: ELECTRIC
11 84-11149A43 CABLE ASSEMBLY, Brown/White Comment: ELECTRIC
12 84-824372A1 CABLE ASSEMBLY Comment: ELECTRIC
13 8M0010250 BRACKET Comment: ELECTRIC
14 825096T01 SOLENOID Comment: ELECTRIC
15 12-827205 WASHER Comment: ELECTRIC
16 11-827204 NUT, (M6) Comment: ELECTRIC
17 13-400256 LOCKWASHER, (M6) Comment: ELECTRIC
18 11-400212 NUT, (M6) Stainless Steel Comment: ELECTRIC
19 85-826574 BOOT Comment: ELECTRIC
20 855742 LEAD WIRE Comment: ELECTRIC
21 11-94330 NUT, (.250-20) Brass Comment: ELECTRIC
22 84-859451A1 CABLE ASSEMBLY, Fuse Comment: ELECTRIC
23 88-8M0207796 FUSE, 20 Ampere Comment: ELECTRIC
24 84-95084A19 CABLE ASSEMBLY, Fuse Comment: ELECTRIC
25 84-859312T1 HARNESS ASSEMBLY, Engine Wiring Comment: ELECTRIC
26 92753 RETAINER Comment: ELECTRIC
27 84-88439A29 CABLE ASSEMBLY, Battery - Positive Comment: ELECTRIC
28 84-88439A30 CABLE ASSEMBLY, Battery - Negative Comment: ELECTRIC
29 54-816311T TIE STRAP, (8.00 Inches)
30 84-824912A6 CABLE ASSEMBLY Comment: (HANDLE)
31 835401T1 CDI UNIT
32 10-84058M BOLT, (M6 x 20)
33 855685T COIL ASSEMBLY, Ignition Comment: (Includes Leads and Boots)
34 84-825102A1 HIGH TENSION LEAD
35 25-82069M GROMMET
36 853524 SWITCH, Oil Pressure
37 NSS NOT SOLD SEPARATE, Screw
38 853537 LEAD WIRE
39 835406 RECTIFIER/REGULATOR Comment: MANUAL
40 10-811188T BOLT, (M6 x 16) Comment: MANUAL
41 89-853598T SOLENOID ASSEMBLY Comment: ELECTRIC NON/HANDLE
42 853599T BRACKET Comment: ELECTRIC NON/HANDLE
43 853601 HOOK WIRE Comment: ELECTRIC NON/HANDLE
44 10-855739 SCREW, (M5 x 8) Comment: ELECTRIC NON/HANDLE
45 25-91782M GROMMET Comment: ELECTRIC NON/HANDLE
46 25-82258M O-RING Comment: ELECTRIC NON/HANDLE
47 10-811188T BOLT, (M6 x 16) Comment: ELECTRIC NON/HANDLE
▶Flywheel (11 parts) Flywheel
Ref OEM Part # Part Name
1 11-96650M NUT, (M16)
2 12-96651M WASHER
3 835397 FLYWHEEL Comment: (ELECTRIC)
4 835399T COIL, Charging
5 10-853536 BOLT, (M6 x 25)
6 855944 COIL, Lighting Comment: (ELECTRIC)
7 10-853531 BOLT, (M6 x 40) Comment: (ELECTRIC)
8 54-816311T TIE STRAP, (8.00 Inches)
9 835395 PULSER
10 10-811188T BOLT, (M6 x 16)
11 NSS NOT SOLD SEPARATE, Decal-Warning Neutral
▶Fuel Pump (21 parts) Fuel Pump
Ref OEM Part # Part Name
- 27-835427A00 GASKET SET, Powerhead
1 835389T02 PUMP ASSEMBLY, Fuel
2 NSS NOT SOLD SEPARATE, Body
3 21-41888M CHECK VALVE
4 8095613 DIAPHRAGM
5 24-8095622 SPRING
6 8095632 PLUNGER
7 24-8095623 SPRING
8 10-8095641 SCREW, (M4 x 30)
9 8095614 DIAPHRAGM
10 10-41889M SCREW, (M3 x 5)
11 11-8237515 NUT, (M4)
12 17-8095662 PIN
13 35-80365M FILTER
14 54-82047M CLAMP
15 32-8M0060021 HOSE
16 10-855683 SCREW, (M6 x 25)
17 25-825478 O-RING
18 54-82047M CLAMP
19 32-8M0053527 HOSE
20 54-83577M CLAMP
▶Gear Housing, Driveshaft - 2.00:1 Gear Ratio (45 parts) Gear Housing, Driveshaft - 2.00:1 Gear Ratio
Ref OEM Part # Part Name
- 46-42089A5 PUMP KIT, Water
1 1666-8833A18 GEAR HOUSING ASSEMBLY, Basic-Gray
2 23-12009 BUSHING, (.31 x .45 x .50)
3 22-8M0058389 FITTING KIT, Magnetic, Plug Fill/Drain
4 12-191833 WASHER, Fiber
5 822244A1 SLEEVE ASSEMBLY
6 23-823944 SLEEVE
7 23-823943 BUSHING
8 10-79953Q04 SCREW KIT, (.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 43-8219251 GEAR, Pinion - 13-26
16 12-41369 WASHER
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 NSS NOT SOLD SEPARATE, Insert
30 26-421021 SEAL
31 47-42038Q02 IMPELLER
32 28-8M0173458 KEY ASSEMBLY
33 NSS NOT SOLD SEPARATE, Washer
34 444671 GUIDE
35 10-82684430 SCREW, (M6 x 30)
36 12-8M0204649 WASHER, (.281 x .500 x .060) Stainless Steel
37 42039 CAM
38 855281 SHIFT SHAFT Comment: (LONG)
39 11-400212 NUT, (M6) Stainless Steel
40 822419 COUPLER
41 8529941 SHIFT SHAFT (UPPER)
42 53-42389 E RING
43 45-825843 DRIVESHAFT Comment: (LONG)
44 12-822248 THRUST WASHER
▶Gear Housing, Driveshaft - 2.42:1 Gear Ratio (46 parts) Gear Housing, Driveshaft - 2.42:1 Gear Ratio
Ref OEM Part # Part Name
- 46-99157T2 REPAIR KIT, Water Pump
1 1665-8669A22 GEAR HOUSING ASSEMBLY, Basic-Gray
2 NSS NOT SOLD SEPARATE, Sleeve
3 26-99325 SEAL
4 31-41326 BEARING, Roller
5 17-8M0084726 PIN, Dowel (.187 x .530)
6 10-79953Q04 SCREW KIT, (.375-16 x .250)
7 12-191833 WASHER, Fiber
8 35-41133 SCREEN, Water Inlet Port
9 10-40031112 SCREW, (M5 x 40)
10 22-8M0058389 FITTING KIT, Magnetic, Plug Fill/Drain
11 12-191833 WASHER, Fiber
12 35-41134 SCREEN
13 11-400263 NUT, (M5)
14 31-98294A1 BEARING ASSEMBLY, Roller
15 NSS NOT SOLD SEPARATE, Cup
16 43-854498 GEAR, Pinion - 12-29
17 11-828490 NUT
18 27-993261 GASKET
19 85083 FACE PLATE
20 12-866451 WASHER
21 28-8M0214993 KEY
22 47-8M0204712 IMPELLER
23 12-866451 WASHER
24 25-69202 O-RING
25 46-99157A02 PUMP ASSEMBLY, Water
26 NSS NOT SOLD SEPARATE, Insert
27 26-85090001 SEAL
28 25-86203 O-RING
29 10-8248324 SCREW, (M6 x 16)
30 854503 SHIFT SHAFT
31 11-400212 NUT, (M6) Stainless Steel
32 822419 COUPLER
33 8529941 SHIFT SHAFT (UPPER)
34 45-854501 DRIVESHAFT
35 85552001 BOOT
36 93878 RETAINER
37 25-35276 O-RING, (.734 x .139)
38 25-85594 O-RING, (.239 x .174)
39 12-85091 WASHER
40 24-93007 SPRING
41 12-8M0204649 WASHER, (.281 x .500 x .060) Stainless Steel
42 17-85593 PIN, (.078 x .437)
43 85562A2 SHIFT CAM
44 17-85096 PIN, Drive
45 23-29804T SLEEVE
▶Gear Housing, Propeller Shaft - 2.00:1 Gear Ratio (23 parts) Gear Housing, Propeller Shaft - 2.00:1 Gear Ratio
Ref OEM Part # Part Name
- 26-41365A3 SEAL KIT
1 1666-8833A18 GEAR HOUSING ASSEMBLY, Basic-Gray
2 31-821321A1 BEARING ASSEMBLY, Roller
3 NSS NOT SOLD SEPARATE
4 43-821924A1 GEAR ASSEMBLY, Forward (13-26)
5 23-41367 BUSHING
6 813139 FOLLOWER, Cam
7 52-821930A1 CLUTCH ASSEMBLY
8 17-823951 PIN, Cross
9 24-42204 SPRING
10 44-821929 PROPELLER SHAFT
11 43-821926T1 GEAR, Reverse - 13/26
12 42144T3 CARRIER ASSEMBLY, Bearing
13 25-8M0214923 O-RING, (1.984 x .139)
14 23-821927 BUSHING
15 26-99325 SEAL
16 26-821928 SEAL, Oil
17 10-82407110 SCREW, (M8 x 50)
18 10-8240717 SCREW, (M8 x 30)
19 48-828156A12 PROPELLER, (9.00 x 9.00)
20 11-40140 NUT, (M10)
21 8219321 THRUST HUB
22 23-420911 SPACER
▶Gear Housing, Propeller Shaft - 2.42:1 Gear Ratio (28 parts) Gear Housing, Propeller Shaft - 2.42:1 Gear Ratio
Ref OEM Part # Part Name
- 26-85090A2 SEAL KIT
1 1665-8669A22 GEAR HOUSING ASSEMBLY, Basic-Gray
45 97-98432Q6 TRIM TAB
46 10-4000354 SCREW, (M8 x 30)
47 12-8M0042642 WASHER, (.323 x .563 x .063) Stainless Steel
48 31-8M0103470 BEARING ASSEMBLY, Roller
49 NSS NOT SOLD SEPARATE, Cup
50 43-854496A1 GEAR ASSEMBLY, Forward - 12/29
51 23-85557 BUSHING
52 85094 FOLLOWER, Cam
53 24-38114 SPRING
54 52-41040T1 CLUTCH
55 17-8M0020999 PIN
56 24-88680 SPRING
57 44-8166231 PROPELLER SHAFT
58 43-854497T GEAR, Reverse - 12/29
59 99906T1 CARRIER ASSEMBLY, Bearing
60 31-21739 BEARING, Roller
61 26-41132 SEAL, Oil (INNER)
62 26-41131 SEAL, Oil (OUTER)
63 25-85549 O-RING
64 87293 PLATE
65 10-90883 SCREW, (M5 x 16)
66 10-87810178 SCREW, (M10 x 35) Stainless Steel
67 12-43328 WASHER
68 851281 THRUST HUB ASSEMBLY
69 48-19636A10 PROPELLER
70 11-88228 PROP NUT
▶Intake (14 parts) Intake
Ref OEM Part # Part Name
- 27-835427A00 GASKET SET, Powerhead
1 835385T MANIFOLD, Intake
2 27-853525 GASKET
3 17-82364M PIN, Dowel
4 10-853531 BOLT, (M6 x 40)
5 853526 INSULATOR
6 27-835383 GASKET
7 25-8250572 O-RING
8 835386T SILENCER
9 37-8272822 DECAL, Warning, High Voltage
10 855781 PLATE
11 855780 COLLAR
12 10-8M0100009 BOLT, (M6 x 100)
13 32-852463 HOSE
▶Intake/Exhaust Valves (15 parts) Intake/Exhaust Valves
Ref OEM Part # Part Name
- 27-835427A00 GASKET SET, Powerhead
1 850838T VALVE, Intake
2 850839T VALVE, Exhaust
3 855959 SEAT, Valve Spring
4 24-850840 SPRING, Valve
5 822650 RETAINER
6 28-893554 KEY
7 26-822647 SEAL, Valve Stem
8 850841A1 ROCKER ARM ASSEMBLY
9 10-825046 SCREW
10 11-826150 NUT
11 850842 SHAFT, Rocker
12 825451 COLLAR
13 24-825452 SPRING
14 24-825453 SPRING
▶Oil Pump/Camshaft (16 parts) Oil Pump/Camshaft
Ref OEM Part # Part Name
- 27-835427A00 GASKET SET, Powerhead
1 834956 CAMSHAFT
2 25-825462 O-RING
3 27-853523 GASKET
4 10-850879 BOLT, (M6 x 35)
5 28-8M0084803 KEY
6 26-825455 SEAL, Oil
7 12-82710M WASHER
8 43-834973T GEAR, Driven
9 12-825498 WASHER
10 10-826957M BOLT (M6 X 16)
11 834967A1 PUMP ASSEMBLY, Oil
12 43-8M0063224 GEAR, Drive
13 12-850843 WASHER
14 11-855679 NUT, (M28)
15 57-835392Q TIMING BELT
▶Recoil Starter (36 parts) Recoil Starter
Ref OEM Part # Part Name
- 8M0049883 RECOIL ASSEMBLY Comment: MANUAL
1 850865A1 HANDLE REST
2 8M0043417 SEAL
3 85174A1 HANDLE ASSEMBLY Comment: HANDLE MODELS
4 NSS NOT SOLD SEPARATE, Retainer Comment: HANDLE MODELS
5 8524791 LAMP Comment: HANDLE MODELS
6 10-8147762 SCREW, (M6 x 16)
7 853541 HOUSING Comment: MANUAL
8 23-852473 COLLAR Comment: MANUAL
9 50-8527732 SHEAVE, Starter Comment: MANUAL
10 852777 PAWL Comment: MANUAL
11 24-852778 SPRING, Starter Comment: MANUAL
12 852780 DRIVEPLATE ASSEMBLY Comment: MANUAL
13 24-852778T01 SPRING, Drive Pawl Comment: MANUAL
14 24-8527782 SPRING Comment: MANUAL
15 24-8527783 SPRING, Return Comment: MANUAL
16 53-852784 CIRCLIP Comment: MANUAL
17 10-852785 BOLT Comment: MANUAL
18 25-852786 GROMMET Comment: MANUAL
19 50-12066Q10 ROPE Comment: MANUAL
20 8527881 STOPPER Comment: MANUAL
21 24-8560361 SPRING, Return Comment: MANUAL
22 24-856036 SPRING Comment: MANUAL
23 10-84058M BOLT, (M6 x 20)
24 10-855783 BOLT, (M6 x 90)
25 12-82213M WASHER
26 11-82390M NUT, (M6)
27 19-858768 PLUG, Warning Light Comment: (ELECTRIC NON-HANDLE)
28 19-822513002 PLUG Comment: (ELECTRIC NON-HANDLE)
29 853541 HOUSING Comment: ELECTRIC
30 23-852473 COLLAR Comment: ELECTRIC
31 37-881865 DECAL, Caution, Start In Gear Comment: ELECTRIC
32 NSS NOT SOLD SEPARATE, Decal-Emergency Start Procedure
33 855691 COVER
34 25-8527681 GROMMET
35 NSS NOT SOLD SEPARATE, Decal-Servicing Referral
▶Service/Support Material (1 parts) Service/Support Material
Ref OEM Part # Part Name
0 37-802740A03 DECAL SET Comment: (GRAY-BIGFOOT)
▶Starter Motor (12 parts) Starter Motor
Ref OEM Part # Part Name
1 10-4000357 SCREW, (M8 x 45)
2 12-4002317 WASHER, Bottom
3 50-859168T STARTER MOTOR ASSEMBLY
4 10-965662 THRU BOLT
5 906432 DRIVE KIT
6 685752 PINION
7 8236391 DRIVE CAP
8 8236383 ARMATURE
9 8119012 CAP, Commutator
10 898265016 BRUSH/SPRING KIT
11 898265014 HOLDER
12 F15158 SCREW
▶Swivel Bracket (46 parts) Swivel Bracket
Ref OEM Part # Part Name
1 3415-822237A4 SWIVEL BRACKET Comment: (GRAY)
2 22-8M0169589 FITTING, Grease
3 22-8M0169589 FITTING, Grease
4 22-8M0169589 FITTING, Grease
5 23-855628A1 BUSHING
6 NSS NOT SOLD SEPARATE, O-Ring
7 NSS NOT SOLD SEPARATE, Bushing
8 NSS NOT SOLD SEPARATE, Bushing
9 NSS NOT SOLD SEPARATE, Washer
10 821961 ROD Comment: HANDLE
11 8165621 DISC Comment: HANDLE
12 821958A1 PLATE KIT Comment: HANDLE
13 10-40011126 SCREW, (M6 x 13) Stainless Steel Comment: HANDLE
14 821957 BRAKE PLATE Comment: HANDLE
15 12-29330 WASHER Comment: HANDLE
16 821959 HANDLE Comment: HANDLE
17 11-8M0204726 NUT, (.375-24) Comment: HANDLE
18 98830A4 HOOK ASSEMBLY, Reverse Lock
19 24-96018 SPRING
20 24-879894 SPRING Comment: HANDLE
21 53-13194 RING, Retaining Comment: HANDLE
22 17-13195 PIN Comment: HANDLE
23 12756 BRACKET Comment: HANDLE
24 24-12754 SPRING Comment: HANDLE
25 12758 LEVER Comment: HANDLE
26 53-13194 RING, Retaining Comment: HANDLE
27 10-849838 SCREW, (.375-24 x 1.25) Comment: ELECTRIC - NON-HANDLE
28 41323A03 LINK ROD ASSEMBLY Comment: ELECTRIC - NON-HANDLE
29 12-37828 WASHER, (.390 x .625 x .062) Stainless Steel Comment: ELECTRIC - NON-HANDLE
30 11-8M0204726 NUT, (.375-24) Comment: ELECTRIC - NON-HANDLE
31 96186A3 BRACKET, Ride Guide Comment: (GRAY) ELECTRIC - NON-HANDLE
32 10-1993325 SCREW, (M10 x 25 MM) Comment: ELECTRIC - NON-HANDLE
33 13-400248 LOCKWASHER, (M10) Comment: ELECTRIC - NON-HANDLE
34 854801T3 SWIVEL HEAD ASSEMBLY Comment: (GRAY)
35 858338A3 SHAFT, Reverse Lock
36 16-854819 STUD, (M10 x 1.5 x 97)
37 12-4002320 WASHER
38 11-4013610 NUT, (M10)
39 8M0039074 MOUNT
40 854729T2 COVER Comment: (STARBOARD) (GRAY)
41 854728T2 COVER Comment: (PORT) (GRAY)
42 10-19943100 SCREW, (M8 x 100)
43 10-1994360 SCREW, (M8 x 60)
44 12-36001 WASHER
45 11-400213 NUT, (M8) Stainless Steel
46 NSS NOT SOLD SEPARATE, Decal-Serial Overlaminate
▶Throttle Linkage, Handle Models (33 parts) Throttle Linkage, Handle Models
Ref OEM Part # Part Name
1 825792 HANDLE
2 25-825781 GROMMET
3 10-82239312 SCREW, (M5 x 12)
4 10-8M0204741 SCREW, (M6 x 20) Stainless Steel
5 12-8M0214930 WASHER
6 825787A2 PULLEY ASSEMBLY
7 23-825788 BUSHING
8 11-401366 NUT, (M6)
9 882818 LINK
10 8257863 PLATFORM
11 23-825789 BUSHING
12 10-8M0204741 SCREW, (M6 x 20) Stainless Steel
13 852494A5 SHIFT SHAFT ASSEMBLY, Horizontal Comment: NON BIGFOOT
14 826063 LEVER, Interlock Comment: NON BIGFOOT
15 10-40011111 SCREW, (M5 x 35) Stainless Steel
16 24-824992 SPRING, Detent
17 24-824993 SPRING, Backing
18 824994 SPRING, Plate
19 10-82239312 SCREW, (M5 x 12)
20 8280471 STRAP
21 10-8M0204741 SCREW, (M6 x 20) Stainless Steel
22 855743 COVER Comment: ELECTRIC
23 10-8M0204741 SCREW, (M6 x 20) Stainless Steel
24 87-11083A30 SWITCH ASSEMBLY
25 8M0032846 RETAINER, Brass
26 15920Q54 LANYARD ASSEMBLY
27 54-816311T TIE STRAP, (8.00 Inches)
28 852472 WIRE Comment: MANUAL
29 855888F BRACKET
30 10-82239312 SCREW, (M5 x 12)
31 87-8M0052929 SWITCH ASSEMBLY Comment: ELECTRIC
32 824923 PLATE Comment: ELECTRIC
33 10-82470620 SCREW, (M3.5 x 20) Comment: ELECTRIC
▶Throttle Linkage, Non-Handle Models (37 parts) Throttle Linkage, Non-Handle Models
Ref OEM Part # Part Name
1 826037 PLUG
2 8280471 STRAP
3 10-8M0204741 SCREW, (M6 x 20) Stainless Steel
4 10-82239312 SCREW, (M5 x 12)
5 824994 SPRING, Plate
6 24-824993 SPRING, Backing
7 24-824992 SPRING, Detent
8 852494A5 SHIFT SHAFT ASSEMBLY, Horizontal Comment: NON BIGFOOT
9 826063 LEVER, Interlock Comment: NON BIGFOOT
10 10-40011111 SCREW, (M5 x 35) Stainless Steel
11 835415F REMOTE CONTROL PLATFORM
12 10-8M0204741 SCREW, (M6 x 20) Stainless Steel
13 852498 COVER
14 10-832047 SCREW, (M6 x 20)
15 8524961 LEVER, Shift Shaft
16 10-82239312 SCREW, (M5 x 12)
17 852497A2 SHIFT LINK ASSEMBLY
18 817428 SOCKET
19 10-32,11-45076 NUT, Brass
20 8354191 SEAL
21 850856 LEVER, Shift
22 23-91912 BUSHING
23 10-8M0204741 SCREW, (M6 x 20) Stainless Steel
24 822459 RETAINER
25 11-825677 PUSH NUT
26 850857 LEVER, Throttle
27 822459 RETAINER
28 11-825677 PUSH NUT
29 10-82129145 SCREW, (M6 x 45)
30 23-855765 BUSHING
31 828049 SLIDE
32 882817 LINK, Throttle
33 53-8237951 RING, Retaining
34 25-828114 GROMMET
35 19-855937 PLUG
36 54-28700 CLAMP Comment: ELECTRIC
37 10-82239312 SCREW, (M5 x 12) Comment: ELECTRIC
▶Tiller Handle (31 parts) Tiller Handle
Ref OEM Part # Part Name
- 821468T11 TILLER ASSEMBLY Comment: (GRAY)
1 822148A3 COVER
2 822150 PULLEY
3 NSS NOT SOLD SEPARATE, Case
4 10-878608 SCREW, (#10-16 x .500)
5 43242T09 CABLE, Throttle
6 85-9600910 SLEEVE
7 821468T9 ARM ASSEMBLY, Steering Handle Comment: (GRAY)
8 10-40011107 SCREW, (M5 x 16) Stainless Steel
9 10-40011107 SCREW, (M5 x 16) Stainless Steel
10 821972T KNOB, Throttle
11 24-96203 SPRING
12 892995 LOCK, Throttle
13 10-8M0204707 SCREW, (M6 x 25)
14 821463T01 TILLER TUBE
15 37-8242003 DECAL
16 821465 HANDLE, Throttle
17 8M0221732 GRIP
18 87-8M0104613 SWITCH ASSEMBLY, Stop
19 822441 RETAINER
20 23-823939 BUSHING
21 12-822145 WASHER
22 13-826792 WAVE WASHER
23 12-822146 WASHER
24 822841F2 BRACKET Comment: (GRAY)
25 10-4000384 SCREW, (M10 x 80)
26 826648 PLATE
27 889734 HOUSING Comment: ELECTRIC HANDLE
28 824918 CLIP Comment: ELECTRIC HANDLE
29 87-823609A8 SWITCH ASSEMBLY Comment: ELECTRIC HANDLE
30 37-855262 DECAL Comment: ELECTRIC HANDLE
▶Tools (24 parts) Tools
Ref OEM Part # Part Name
1 NSS NOT SOLD SEPARATE, Wrench-Oil Filter (Obtain Locally)
2 91-8M0161873 HOLDER TOOL, Flywheel
3 91-83164M FLYWHEEL PULLER
4 FT2997 COMPRESSOR TOOL, Piston Ring
5 91-83190M STAND TOOL, Powerhead
6 91-809494A1 COMPRESSOR TOOL, Valve Spring
7 91-809495001 REMOVER TOOL, Valve Guide
8 91-809496A1 INSTALLER TOOL, Valve Guide Bushing
9 91-809497A1 REAMER TOOL, Valve Guide
10 NSS NOT SOLD SEPARATE, jValve Seat Cutter Kit-Obtain Locally
11 91-36392 GAUGE TOOL, Carburetor
12 91-37241 PULLER PLATE
13 91-83165T PULLER ASSEMBLY, Bearing
14 91-34569A1 PULLER ASSEMBLY, Slide Hammer
15 91-13664 INSTALLER TOOL, Bearing
16 91-824788A1 REMOVAL TOOL, Bearing
17 91-824790A1 INSTALLATION TOOL, Driveshaft Bushing
18 91-13658T MANDREL
19 91-824787 REMOVAL TOOL, Bushing
20 91-824785T1 INSTALLER TOOL, Bushing And Seal
21 91-29310 PLATE
22 NSS NOT SOLD SEPARATE, Expanding Rod (SNAP-ON #CG40-4)
23 NSS NOT SOLD SEPARATE, Collet (Jaws)(SNAP-ON #CG40A6)
24 FT8950 TESTER KIT
▶Top Cowl (15 parts) Top Cowl
Ref OEM Part # Part Name
1 114-852413T4 TOP COWL ASSEMBLY Comment: (SILVER)
2 852490F BRACKET
3 827702T COVER
4 826649 LATCH
5 10-8231872 SCREW, (M4 x 12)
6 8,13-26995 LOCKWASHER, Stainless Steel
7 11-8237515 NUT, (M4)
8 NSS NOT SOLD SEPARATE, Insert
9 NSS NOT SOLD SEPARATE, Screw (#10 X .5)
10 852491A1 BRACKET ASSEMBLY
11 10-4006731 SCREW, (M6 x 16)
12 18745 ROLLER
13 8M0043391 SEAL, Cowl
14 47341A11 ROPE AND HANDLE KIT, Manual/Emergency Start
15 NSS NOT SOLD SEPARATE, Rope
▶Visual Warning (13 parts) Visual Warning
Ref OEM Part # Part Name
1 17334A4 PLATE ASSEMBLY, Lamp Mounting
2 88-17429 LAMP
3 76424 BRACKET
4 16-55422 STUD, (#10-32 x 2.00)
5 12-24676 WASHER, (.200 x .440 x .032)
6 10-32,11-68219 NUT, Stainless Steel
7 86-45915 TERMINAL BLOCK
8 10-16324 SCREW, (#8 x .625)
9 10-878607 SCREW, (#10-16 x .375)
10 84-11149A3 CABLE ASSEMBLY
11 85-623594 INSULATOR, (2.00 Inch)
12 10-24231 SCREW, (#10-32 x .250)
13 10-32,11-27164 NUT AND LOCKWASHER,

100-Hour / Annual Service Checklist

Regular maintenance keeps your Mercury 15 (4-STROKE) running reliably season after season. Most of these tasks can be performed with basic tools and the factory service manual.

  1. Replace water pump impeller and inspect wear plate
  2. Change engine oil and oil filter (check drain plug washer)
  3. Replace spark plugs and check ignition timing
  4. Drain and refill lower unit gear oil; inspect for water contamination
  5. Inspect fuel lines, primer bulb, and fuel filter for deterioration
  6. Check and replace sacrificial anodes (zinc or aluminum)
  7. Inspect propeller for damage; check shaft seal and cotter pin
  8. Check valve clearance (refer to service manual for specifications)
  9. Lubricate all grease points (steering, tilt tube, shift linkage)
  10. 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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