Mercury 15 SEAPRO (4-STROKE) (0R123565 & Up) Parts & Diagrams

OEM and aftermarket replacement parts for Mercury 15 SEAPRO (4-STROKE). Scroll down for exploded parts diagrams (22), specifications, and maintenance reference.

Mercury 15 SEAPRO (4-STROKE) (0R123565 & Up) Parts & Diagrams

🔎 Mercury 15 SEAPRO (4-STROKE) Reference Library — Exploded parts diagrams (22 diagrams), specifications, common issues, and maintenance checklist.

The Mercury 15 SEAPRO (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 SEAPRO (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 SEAPRO (4-STROKE).

Accessories (1 parts) Accessories
Ref OEM Part # Part Name
- 50-853805A05 STARTER MOTOR KIT, Electric
Bottom Cowl (22 parts) Bottom Cowl
Ref OEM Part # Part Name
1 2189-853778008 BOTTOM COWL
2 23-8537437 MOUNT, Rubber
3 23-853715007 SPACER
4 10-16830 BOLT
5 12-161404 WASHER
6 13-16221 WAVE WASHER
7 16222003 HOOK, Cover
8 10-8230427 BOLT
9 12-953921 WASHER
10 25-16226 GROMMET
11 817015003 LATCH, Cowl
12 26-16219 SEAL
13 23-163365 BUSHING
14 NSS NOT SOLD SEPARATE, Decal Storage
15 25-851850010 GROMMET
16 22-898101961 NIPPLE
17 22-8M0182334 CONNECTOR, Fuel - Brass
18 10-8M0204707 BOLT
19 32-851848014 TUBING, (350 mm)
20 54-95395 CLIP, Stainless Steel
21 25-803513008 GROMMET
22 25-853709008 GROMMET
Camshaft and Oil Pump (19 parts) Camshaft and Oil Pump
Ref OEM Part # Part Name
- 27-835427A05 GASKET SET, Powerhead
1 834956003 CAMSHAFT
2 17-95218015 PIN, Camshaft
3 834967005 PUMP, Oil
4 25-857096001 O-RING
5 25-857093001 O-RING
6 25-857094001 O-RING
7 25-857094002 O-RING
8 10-850879001 BOLT
9 28-95229 KEY
10 26-825455001 SEAL, Oil
11 43-834955003 DRIVE PULLEY
12 43-834973001 GEAR, Driven
13 10-803858001 BOLT
14 12-895118 WASHER
15 57-895120002 BELT, Timing
16 11-855679003 NUT
17 13-823032002 LOCKWASHER
18 895119002 PLATE
Carburetor (29 parts) Carburetor
Ref OEM Part # Part Name
- 3303-8M0059293 CARBURETOR
1 802690010 FLOAT BOWL
2 27-802699004 GASKET
3 853830003 PLUNGER, Complete
4 24-895116001 SPRING
5 10-895136001 SCREW
6 10-162601 SCREW
7 10-803509015 SCREW, Drain
8 27-8M0094878 GASKET
9 16253004 FLOAT
10 17-16256004 FLOAT, Arm Pin
11 10-16196001 SCREW
12 895115001 BOOT, Rubber
13 853746003 ROD, Link
14 802700006 NOZZLE, Main
15 802701007 JET, (Main #105)
16 50,803689005 JET, Pilot
17 16252 CAP
18 898101063 FLOAT VALVE
19 54-16255 CLIP
20 10-16263 SCREW
21 24-16264002 SPRING
22 10-895140004 SCREW
23 855540003 COVER, Carburetor
24 27-855541004 GASKET
25 10-855542 SCREW
26 854254005 ENRICHENER, With O-Ring
27 854255001 PLATE
28 10-855542 SCREW
Clamp Bracket (41 parts) Clamp Bracket
Ref OEM Part # Part Name
1 8M0059754 CLAMP BRACKET, Starboard Comment: SN# 0N184833 & Up
2 8M0059755 CLAMP BRACKET, Port Comment: SN# 0N184833 & Up
3 898101191 TILT TUBE
4 11-853722029 NUT, Nylon
5 23-8537435 BUSHING
6 11-85372214 CAP NUT
7 898101938 DISTANCE PIECE Comment: SN# 0N124687 & Up
8 12-16826 WASHER, Stainless Steel
9 803787 LINK, Reverse Lock
10 11-400212 NUT
11 16198004 THRUST ROD
12 24-815093003 SPRING
13 10-16200A1 THUMB SCREW ASSEMBLY, 1/2 Inch Thread Size
14 12-95379 PAD
15 37-823701003 DECAL, Co-Pilot
16 97-823913Q ANODE
17 10-167051 BOLT, (M6 x 20)
18 17-803784002 SHAFT, Reverse Lock
19 53-160572 E RING
20 10-879194310 BOLT
21 12-16192 WASHER
22 11-879194337 NUT
23 8M0051399 BUTTON
24 8M0183798 GRIP
25 803789 LEVER, Reverse Lock
26 10-803790 BOLT
27 13-17641 WAVE WASHER
28 12-953921 WASHER
29 803783001 ARM, Reverse Lock
30 24-803788 SPRING
31 24-8037461 SPRING
32 803782 LOCK, Reverse
33 17-8037841 ROD, Reverse Lock
34 18-8150261 COTTER PIN
35 898103103 STOP, Tilt
36 10-850879003 BOLT
37 8M0157137 SET PLATE
38 17-170331 PIN, Spring
39 23-163364 BUSHING
40 853774 STOP
41 24-953832 SPRING
Crankshaft, Pistons and Connecting Rods (14 parts) Crankshaft, Pistons and Connecting Rods
Ref OEM Part # Part Name
- 895274A06 POWERHEAD ASSEMBLY
1 400-834957A03 CRANKSHAFT
2 31-834960012 BEARING Comment: (Brown)
3 26-855681004 SEAL, Oil
4 26-855681005 SEAL, Oil
5 28-825666001 KEY
6 600-834961003 ROD, Connecting
7 10-8035092 BOLT
8 41-898103113 PIN, Piston
9 53-160573 E RING
10 700-834963006 PISTON Comment: (0.5 mm Oversize)
11 39-803518T02 RING SET, Piston Comment: (.5 Oversize)
12 NSS NOT SOLD SEPARATE, Piston Ring-Second
13 NSS NOT SOLD SEPARATE, Oil Ring
Cylinder Block (41 parts) Cylinder Block
Ref OEM Part # Part Name
- 27-850836A05 GASKET SET, Powerhead
1 878-815013A08 CYLINDER BLOCK
2 17-16119 PIN, Dowel
3 10-855677005 BOLT
4 10-166985 BOLT
5 12-809931044 WASHER
6 22-822644001 NIPPLE
7 10-855677004 BOLT
8 803666005 COVER, Exaust
9 27-803663016 GASKET
10 10-825009026 BOLT
11 32-851848003 HOSE, (330 mm), To Tell Tale
12 10-16832 BOLT, (M6 x 16)
13 97-823912 ANODE
14 27-895150001 GASKET
15 97-895151001 PLUG, Anode
16 10-167051 BOLT, (M6 x 20)
17 35-8M0162831 FILTER ASSEMBLY, Oil
18 54-816311T TIE STRAP
19 32-8M0057117 HOSE
20 35-895152003 STRAINER, Oil
21 10-898103228 BOLT
22 853756002 PLATE
23 27-851834001 GASKET
24 898101142 PLUNGER
25 834954004 COVER , Plunger
26 32-851848025 TUBING, (200 mm)
27 54-95224 CLIP
28 803512002 DIPSTICK
29 803511001 CAP
30 27-803508020 GASKET
31 10-895136003 SCREW
32 54-803563005 CLAMP
33 855550003 LIFTING EYE
34 10-16830009 BOLT
35 54-8M0130961 CLAMP
36 10-879194248 BOLT
37 8M0119207 THERMOSTAT, 60 Degrees
38 8537052 CAP
39 27-8M0214960 GASKET
40 10-8M0102279 BOLT, Stainless Steel
Cylinder Head (14 parts) Cylinder Head
Ref OEM Part # Part Name
- 895274A06 POWERHEAD ASSEMBLY
1 900-835430A05 CYLINDER HEAD ASSEMBLY
2 27-850836003 GASKET
3 17-16119 PIN, Dowel
4 10-855677002 BOLT
5 10-823042054 BOLT
6 10-898101009 SCREW
7 12-809931044 WASHER
8 834954003 COVER
9 27-803508019 GASKET, Rubber
10 10-16830A1 SCREW KIT
11 36-8M0135589 CAP ASSEMBLY, Oil Filler
12 25-803513007 O-RING
13 33-8M0204682 SPARK PLUG, NGK#DCPR6E
Driveshaft Housing (24 parts) Driveshaft Housing
Ref OEM Part # Part Name
- 27-850836A05 GASKET SET, Powerhead
1 1599-8M0102961 HOUSING, Driveshaft - Long
2 852432004 SEAL, Rubber
3 17-16119 PIN, Dowel
4 26-8036675 SEAL, Oil
5 853771006 RUBBER MOUNT
6 853772004 LOCK PLATE
7 10-879194273 BOLT
8 19-803593 PLUG
9 27-854617002 GASKET
10 853577002 COVER, Idle Port
11 10-810755013 BOLT
12 25-851850009 GROMMET
13 8M0111615 BOLT
14 12-895146 WASHER
15 25-804899003 GROMMET
16 26-16168003 SEAL, Rubber
17 32-803755009 TUBE, Water Comment: (Long)
18 803758001 GUIDE, Rubber
19 852432003 SEAL, Rubber
20 850862T02 COVER, Driveshaft Housing-Port, Design-II Comment: Use With Self Tap Fasteners
21 850863T02 COVER, Driveshaft Housing-Starboard, Design-II Comment: Use With Self Tap Fasteners
22 10-16257004 SCREW, Tapping, Design-II Comment: Use With Design-II Covers
23 11-400212 NUT, Design-I Comment: Use With Design-I Covers
Electrical Components (36 parts) Electrical Components
Ref OEM Part # Part Name
1 262-803577003 FLYWHEEL
2 11-851832001 NUT, Gold
3 12-853991002 WASHER
4 16058004 STATOR
5 10-853536002 SCREW
6 12-895106003 WASHER
7 54-953951 CLAMP
8 10-162452 SCREW
9 895267001 BRACKET
10 10-855544016 SCREW
11 17-16119 PIN, Dowel
12 835395004 COIL, Pulser
13 10-878388001 SCREW
14 835401005 CD UNIT
15 10-16705 BOLT
16 12-953921 WASHER
17 54-17169001 CLAMP
18 853739004 BRACKET
19 23-8M0021168 COLLAR, (9.3 mm)
20 25-851815005 GROMMET
21 12-953921 WASHER
22 10-8M0204707 SCREW, (M6 x 25)
23 12-953924 WASHER, (Rubber)
24 84-895121A04 CD HARNESS
25 19-853994 PLUG
26 339-803559A04 COIL ASSEMBLY, Ignition
27 85-803560001 BOOT
28 10-823042 BOLT
29 804057001 PILOT LAMP
30 54-813275 CLAMP
31 87-8M0163139 SWITCH
32 84-803539001 WIRE, Lead
33 84-895122A01 CABLE ASSEMBLY
34 19-853994 PLUG
35 54-953951 CLAMP
36 10-16832 BOLT, (M6 x 16)
Fuel Tank Assembly(Plastic - 3.2 Gallon) (6 parts) Fuel Tank Assembly(Plastic - 3.2 Gallon)
Ref OEM Part # Part Name
1 1260-859061A1 TANK ASSEMBLY, Fuel (Plastic-3.2 Gallon)
2 823535 GAUGE/CAP ASSEMBLY
3 27-8169771 GASKET, Fuel Cap
4 22-8M0175544 CONNECTOR KIT, Fuel
5 25-823533 O-RING
6 35-823534 SCREEN
Gear Housing, Driveshaft (45 parts) Gear Housing, Driveshaft
Ref OEM Part # Part Name
- 853792A09 REPAIR KIT, Gear Housing Water Pump - Chrome
1 1668-803729A3 GEAR HOUSING ASSEMBLY, Basic
2 31-160521 BEARING, Needle
3 22-8M0229353 PLUG
4 27-95220 GASKET
5 97-803731 ANODE
6 10-16832 BOLT, (M6 x 16)
7 16133 STRAINER, Water
8 10-16134 SCREW
9 22-8M0229353 PLUG
10 27-95220 GASKET
11 803730002 STRAINER, Water
12 10-879194326 SCREW
13 16-879194301 STUD
14 803762 CLAMP
15 10-898103153 SCREW
16 8M0172382 CAM
17 17-16179 PIN
18 8M0123274 CAM ROD, Long
19 23-803761 BUSHING
20 25-8537096 O-RING
21 25-161772 O-RING
22 12-8M0135942 WASHER
23 11-879194337 NUT
24 11-85372211 NUT
25 11-85372216 NUT
26 46-803750A05 HOUSING ASSEMBLY, Upper Water Pump, Includes Water Pump Liner
27 26-8036674 SEAL, Rubber
28 10-823042046 BOLT
29 803751 LINER, Water Pump, Included with Upper Water Pump Housing
30 47-8M0214944 IMPELLER
31 803753 GUIDE PLATE
32 46-803750A04 BASE ASSEMBLY, Water Pump
33 25-8537096 O-RING
34 26-803752 SEAL, Oil
35 15-813276005 SHIM, (0.5)
36 30-16132T05 BEARING, Ball
37 45-803738008 DRIVESHAFT Comment: Long
38 28-8M0173418 KEY
39 43-16138003 GEAR, Pinion
40 851859 CONNECTOR
41 17-952189 PIN, Dowel
42 25-853709007 GROMMET
43 803766006 SHIFT ROD
44 27-8M0075040 GASKET, Guide Plate Comment: SN# OR501887 & Up
Gear Housing, Propeller Shaft (24 parts) Gear Housing, Propeller Shaft
Ref OEM Part # Part Name
- 27-8M0082884 GASKET SET, Lower Unit
1 1668-803729A3 GEAR HOUSING ASSEMBLY
2 30-16132T01 BEARING, Ball
3 43-812944003 GEAR, Forward
4 803747 PUSH ROD
5 853764003 HOLDER
6 24-803746 SPRING
7 52-803745 CLUTCH
8 17-160851 PIN
9 24-176672 SPRING
10 44-8M0088568 PROPELLER SHAFT
11 8M0070877 CARRIER ASSEMBLY, Bearing
12 25-8M0087846 O-RING
13 30-16132T01 BEARING, Ball
14 31-803734 BEARING, Needle
15 26-161622 SEAL, Oil
16 10-823042 BOLT, Stainless Steel
17 12-803742 WASHER
18 43-812945004 GEAR, Reverse
19 8M0143215 THRUST HOLDER
20 48-897752A11 PROPELLER, (10 Pitch) Comment: (10) (Standard Short)
21 12-161402 WASHER
22 11-161471 PROP NUT
23 18-8150264 COTTER PIN
Intake Manifold and Fuel Pump (23 parts) Intake Manifold and Fuel Pump
Ref OEM Part # Part Name
- 27-835427A05 GASKET SET, Powerhead
1 804887003 MANIFOLD, Inlet
2 27-853525004 GASKET
3 17-16119 PIN, Dowel
4 10-16125 BOLT
5 12-16826 WASHER, Stainless Steel
6 54-953951 CLAMP
7 27-16327002 GASKET, Carburetor
8 853526004 INSULATOR
9 853728003 SILENCER, Air
10 54-95395 CLIP, Stainless Steel
11 25-825057005 O-RING
12 10-855809001 BOLT
13 12-16826 WASHER, Stainless Steel
14 32-851848012 TUBING, (110 mm)
15 54-952245 CLAMP
16 803529T04 PUMP ASSEMBLY, Fuel
17 853731004 DIAPHRAGM SET
18 25-16109003 O-RING
19 10-823042 BOLT
20 32-851848013 TUBING, (320 mm)
21 32-851848006 HOSE, (150 mm)
22 35-8M0157133 FILTER, Fuel
Intake Valve and Exhaust Valve (17 parts) Intake Valve and Exhaust Valve
Ref OEM Part # Part Name
- 895274A06 POWERHEAD ASSEMBLY
1 850838T02 VALVE, Intake
2 850839T02 VALVE, Exhaust
3 26-822647001 SEAL, Intake - Black
4 26-822647002 SEAL, Exhaust - Green
5 24-898101214 SPRING
6 8M0158660 SEAT
7 803555 RETAINER
8 28-803556 KEEPER, Valve
9 850841003 ARM, Rocker
10 10-825046001 SCREW, Adjusting
11 11-826150001 NUT, Adjusting
12 850842001 ROCKER ARM SHAFT
13 825451001 COLLAR
14 24-825452002 SPRING
15 24-825453001 SPRING
16 12-895118001 WASHER
Powerhead Gasket Set Components (1 parts) Powerhead Gasket Set Components
Ref OEM Part # Part Name
- 26-8036675 SEAL, Oil, Driveshaft
Recoil Starter (30 parts) Recoil Starter
Ref OEM Part # Part Name
1 8M0170582 STARTER ASSEMBLY, Recoil
2 803716005 HOUSING, Starter
3 804029 HANDLE, Starter
4 853755002 CAP, Starter Handle
5 24-804024008 SPRING, Starter
6 53-852784001 E RING
7 803717002 REEL
8 50-8M0110715 ROPE, Starter
9 812635T03 RATCHET
10 898101148 RATCHET GUIDE
11 24-812634004 SPRING, Return
12 812638002 PLATE, Friction
13 24-8M0126988 SPRING, Friction
14 10-8M0126987 BOLT
15 804031002 LOCK, Starter
16 24-812645008 SPRING
17 824995005 SEAL, Rubber
18 10-16830 BOLT
19 23-8035731 COLLAR
20 12-953921 WASHER
21 54-8M0130961 CLAMP
22 11-856949002 NUT
23 25-881305006 GROMMET, Rubber
24 23-895162001 COLLAR, Steel
25 24-812645009 SPRING
26 895133T01 COVER, Belt
27 10-16830 BOLT
28 10-16705 BOLT
29 12-953921 WASHER
30 23-952868 COLLAR
Service/Support Material (1 parts) Service/Support Material
Ref OEM Part # Part Name
- 90-895256006 PARTS MANUAL, 15 HP SeaPro 4-Stroke
Shift Components (30 parts) Shift Components
Ref OEM Part # Part Name
1 895174002 COVER
2 10-879194334 SCREW
3 37-802987001 DECAL, F, N, R
4 853739005 BRACKET
5 10-823042 BOLT
6 25-16823002 GROMMET
7 895176001 BRACKET, Shift Lever
8 10-167051 BOLT, (M6 x 20)
9 804892003 DRUM, Throttle
10 16333 ROD, Snap
11 803574003 ROD, Throttle
12 10-16705 BOLT
13 12-953921 WASHER
14 23-952868 COLLAR
15 803763004 LEVER, Shift
16 23-895126001 COLLAR
17 10-8M0147119 BOLT
18 892774002 ROD, Shift Lever
19 851862002 SHIFT ARM
20 851865002 SHIFT SHAFT
21 24-8M0138736 STOPPER
22 8M0138737 CLAMP
23 10-82304223 BOLT
24 803548001 PLATE
25 10-8248324 SCREW, (M6 x 16)
26 895131A03 CABLE ASSEMBLY, Starter
27 853817002 BRACKET
28 87-823037A2 SWITCH ASSEMBLY, Stop - Lanyard
29 823054 LANYARD
30 853986001 SEAL
Swivel Bracket (30 parts) Swivel Bracket
Ref OEM Part # Part Name
1 8M0059753 SWIVEL BRACKET Comment: SN# 0N184833 & Up
2 23-16336008 BUSHING
3 803774003 THRUST PLATE
4 25-16109003 O-RING
5 22-824969 FITTING, Grease
6 10-895140002 BOLT
7 8M0145395 DISC
8 895172001 PLATE, Co-Pilot
9 10-8248324 SCREW, (M6 x 16)
10 12-895146002 WASHER
11 12-895146001 WASHER
12 895171001 HANDLE, Co-Pilot
13 11-95374001 NUT, Nylon
14 84-898101089 GROUND WIRE
15 10-8230427 BOLT, (M6 x 12), To Starboard Clamp Bracket
16 10-85554410 SCREW
17 8M0102284 BRACKET, Starboard
18 10-879194310 BOLT
19 10-879194309 BOLT
20 803775006 MOUNT, Lower
21 8M0102285 BRACKET, Port
22 10-167051 BOLT, (M6 x 20)
23 97-823913Q ANODE
24 12-8M0135942 WASHER
25 11-879194337 NUT
26 10-823042059 BOLT
27 853770004 SWIVEL TUBE
28 16-895166001 STUD BOLT
29 12-879194340 WASHER, Stainless Steel
30 11-85372212 NUT, Nylon
Tiller Handle (25 parts) Tiller Handle
Ref OEM Part # Part Name
1 803996002 Handle, Steering
2 23-823939001 BUSHING
3 12-822145001 WASHER
4 13-826792001 WAVE WASHER,
5 826648001 PLATE, Handle
6 16-815028 STUD BOLT
7 13-400256 LOCKWASHER, (M6)
8 11-400212 NUT
9 804898001 WIRE, Throttle
10 804019002 BRACKET, Steering
11 10-8M0058362 BOLT, Steel
12 12-879194340 WASHER, Stainless Steel
13 17-16085 PIN
14 16338 BRACKET
15 10-879194329 SCREW
16 813026 FRICTION PIECE
17 10-16087 SCREW, Adjusting
18 12-16826 WASHER, Stainless Steel
19 11-400212 NUT
20 803998002 SHAFT, Throttle
21 853775003 GRIP
22 10-803876002 SCREW
23 37-824200005 DECAL, Throttle
24 23-16191 SPACER
25 23-16336 BUSHING
Upper Cowl (11 parts) Upper Cowl
Ref OEM Part # Part Name
- 37-895762A05 DECAL SET
1 114-803580A13 TOP COWL ASSEMBLY
2 16218010 TILT HANDLE
3 895178002 SEAL, Rubber
4 853788002 ROLLER
5 12-953921 WASHER
6 53-953181 E RING
7 12-953921 WASHER
8 13-400256 LOCKWASHER, (M6)
9 11-400212 NUT
10 NSS NOT SOLD SEPARATE, Decal-Oil Pressure

100-Hour / Annual Service Checklist

Regular maintenance keeps your Mercury 15 SEAPRO (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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