Tohatsu MFS9.9/15/20D (2015) Parts & Diagrams

OEM and aftermarket replacement parts for Tohatsu MFS9.9/15/20D. Scroll down for exploded parts diagrams (23), specifications, and maintenance reference.

Tohatsu MFS9.9/15/20D (2015) Parts & Diagrams

🔎 Tohatsu MFS9.9/15/20D Reference Library — Exploded parts diagrams (23 diagrams), specifications, common issues, and maintenance checklist.

The Tohatsu MFS9.9/15/20D is a 4-Stroke EFI 2-Cylinder outboard motor. A popular choice for small fishing boats, inflatable RIBs, and sailboat auxiliaries.

Quick Reference Specifications

Specification Value
Engine Type 4-Stroke EFI 2-Cylinder
Horsepower 10 HP
Displacement 333 cc
Bore x Stroke 61.0 x 57.0 mm
Spark Plug (Type & Gap) NGK DCPR6E
Engine Oil Capacity 1.2 L (with filter)
Recommended Engine Oil SAE 10W-30
Gear Case Oil Capacity 320 mL (10.8 fl oz)
Idle Speed (in gear) 900-950 RPM
Full Throttle RPM Range 5400-6100 RPM
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 Tohatsu MFS9.9/15/20D:

  • 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 Tohatsu MFS9.9/15/20D.

ASSEMBLY・KIT PARTS (10 parts) ASSEMBLY・KIT PARTS
Ref OEM Part # Part Name
1 3BHQ87304-2 LOWER UNIT ASSY (UL)
2 3SAB87090-0 ENGINE SHORT BLOCK KIT
3 3V9-07402-1 * OILPAN GASKET
4 398-87321-3 LOWER UNIT GASKET SET
5 9101E3-5652 * BOLT
6 3FS-65029-0 * GUIDE PLATE GASKET
7 910103-5825 * BOLT
8 951407-2512 * SPRING PIN
9 922503-6412 * SCREW
10 3BJ-10230-0 ALTITUDE ADJUSTMENT KIT
BOTTOM COWL (58 parts) BOTTOM COWL
Ref OEM Part # Part Name
1 3BAQ67100-0 BOTTOM COWL
2 9101E3-0630 BOLT
3 3BJ-67115-0 WASHER 6.5-20.5-1
4 346-67113-0 MOUNT 8.5-14-2.5
5 346-67114-1 SPACER 6.2-9-15.7
6 3R3-67162-0 GROMMET 25-15-3
7 3R3-66226-0 GROMMET 40-18-3
8 3BJ-67484-0 SEAL
9 345-67117-0 GROMMET 17-2.7
10 3A3-76037-0 CABLE TERMINAL PLUG
11 3BA-72618-0 GROMMET 46-3
12 3BA-67187-0 GROMMET
13 3R3-71040-0 PILOT LAMP ASSY
14 3BA-01138-0 NIPPLE 6.8-3-10
15 98AB-50-330 HOSE
16 394-70260-0 FUEL CONNECTOR (MALE)
17 9101E3-5616 BOLT
18 3H6-70262-0 FUEL CONNECTOR PROTECTOR
19 98AB-50-400 HOSE
20 345-76023-0 GROMMET 22-2.5
21 3BJ-70313-0 FUEL HOSE PROTECTOR φ10.7-280
22 3BA-02160-0 FUEL HOSE W/PROTECTOR L=400
23 369-02230-0 FUEL FILTER ASSY
24 98AB-50-120 HOSE
25 3BH-02160-0 FUEL HOSE W/PROTECTOR L=120
26 3GT-35143-0 CLIP φ9.4
27 398-06830-0 STOP SWITCH ASSY
28 353-06821-0 * STOP SWITCH LANYARD ASSY
29 3AA-76026-0 MAIN SWITCH ASSY
30 3NV-76080-0 NEUTRAL SWITCH
31 398-76083-0 NEUTRAL SWITCH ACTUATOR
32 3BJ-76081-0 NEUTRAL SWITCH BRACKET
33 3AC-72615-0 PTT SWITCH ASSY
34 3F3-72616-1 GASKET
35 3AL-72617-0 PTT SWITCH ASSY BRACKET
36 3BJQ67480-0 SHIFT LEVER BRACKET
37 3C8-67156-0 BUSHING
38 3C8-67151-1 CHOKE ROD
39 9101E3-5620 BOLT
40 3BH-63622-0 THROTTLE DRUM ASSY
41 3BJ-06283-0 COLLAR 6.1-9-7.4
42 9101E3-0620 BOLT
44 3BJ-63508-0 THROTTLE WIRE BRACKET
45 9101E3-5625 BOLT
46 3BJ-66260-0 GROMMET
47 3R3Q67141-0 HOOK LEVER
48 338-67147-0 SEAL RING 13.8-22-3.7
49 350-67105-0 HOOK LEVER BUSHING 14-16.5-17.7
50 941403-1400 WAVE WASHER d=14
51 3SA-67142-0 COVER HOOK
52 3R0-66308-0 WASHER 6-16-1.5
53 3Y3-60108-0 BOLT
54 3BA-63617-0 THROTTLE ROD
55 3BJ-67481-0 SHIFT LEVER BRACKET COVER
56 3BJ-67485-0 BOLT 6-35
57 3V9-67578-3 SHIFT DECAL
58 3H6-67572-0 STORAGE DECAL
59 3SA-67154-0 PLASTIC RIVET
BRACKET (MANUAL) (79 parts) BRACKET (MANUAL)
Ref OEM Part # Part Name
1 3R3-65205-0 LOCK PLATE
2 3BJQ62112-0 CLAMP BRACKET (R)
3 3H8-72049-0 CO-PILOT DECAL
4 3BJQ62113-0 CLAMP BRACKET (L)
6 9101E3-5620 BOLT
7 3V6-62117-0 DISTANCE PIECE
9 9401E3-0600 WASHER
10 9301E3-0600 NUT
11 3AC-62191-0 SWIVEL BRACKET SHAFT ASSY
12 346-62124-1 NYLON NUT 7/8-14
13 349-62126-0 BUSHING
14 346-62127-0 CAP NUT
15 3BJ-62123-0 THRUST ROD ASSY
16 369-62122-2 * THRUST ROD SPRING
17 3BJQ62309-0 SWIVEL BRACKET ASSY
18 3BA-66314-0 * PIN
19 344-67177-1 GREASE FITTING
20 3BKQ62010-0 STEERING SHAFT ASSY
21 3R3-62417-0 BUSHING 28-31-35
22 3H8-62423-1 THRUST PLATE (UPPER)
23 3H8-62415-0 O-RING 3.5-25.7
24 3BJ-61301-0 RUBBER MOUNT (UPPER)
25 9101E3-5830 BOLT
26 3R3-61313-1 STUD 10-95
27 930403-1000 NYLON NUT 10-P1.5
28 9401E3-1000 WASHER
29 3BJ-61336-0 DAMPER (LOWER)
30 3BJ-61302-0 RUBBER MOUNT (LOWER)
31 3BJQ61401-0 MOUNT BRACKET (R)
32 3BJQ61402-0 MOUNT BRACKET (L)
33 9101E3-0855 BOLT
36 3P0-66233-0 WASHER 8.1-16-1.5
37 338-60218-2 ANODE
38 910103-5620 BOLT
39 3AA-62441-0 FRICTION LEVER
40 3R3-62443-0 WASHER 8.1-20-0.8
41 3R3-62445-0 BOLTM 8 P1.25
42 3V5-62442-0 NYLON NUT 8-P1.25
43 3R3-62447-0 PLATE
44 9101E3-5616 BOLT
45 3R3-62448-1 WASHER 8.5-38-3
46 3R3-62449-0 DISC 8.5-38-2
47 3G2Q62993-1 TILT STOPPER
48 951403-0540 SPRING PIN
49 350-62437-0 BUSHING 8.2-10-26.5
50 350-62439-1 SETTING PLATE
51 9101E3-5818 BOLT
52 3C8-62421-1 FRICTION SPRING
53 346-62438-0 SETTING PIECE
55 910103-5610 BOLT
57 398-62396-1 GROUND L=130
58 910103-5612 BOLT
59 3BA-66311-0 REVERSE LOCK LEVER
60 3AL-66333-0 REVERSE LOCK LEVER GRIP
61 346-66334-0 STOPPER
62 3AL-05254-0 SHOULDER BOLT 6-8
64 3AL-05212-0 BUSHING 8.1-20
65 3AA-83719-0 WASHER 8.5-18-1.6
66 3R0-66308-0 WASHER 6-16-1.5
67 3SA-66322-0 REVERSE LOCK
68 3SA-66313-0 REVERSE LOCK ARM
69 3BA-63207-0 COLLAR 6.5-12.5-7.5
70 3G2-66324-0 REVERSE LOCK SHAFT
71 945303-0500 E-RING d=5
72 3BA-66323-0 REVERSE LOCK LEVER SPRING
73 3SA-66315-0 REVERSE LOCK SPRING
74 3SA-66305-0 REVERSE LOCK LINK
75 951403-0535 SPRING PIN
76 345-05223-1 ROD SNAP 3.5-2
77 9101E3-0885 BOLT
78 9301E3-0800 NUT
79 9401E3-0800 WASHER
80 3AAQ62105-0 CLAMP SCREW KIT
81 3AAQ62108-0 * CLAMP SCREW ASSY
82 3AA-62106-0 ** CLAMP SCREW
83 332Q62102-1 ** CLAMP SCREW HANDLE
84 3C8-62104-2 ** RIVET 3-22
85 332-62101-1 * CLAMP SCREW PAD
86 3C8-62107-0 * SHOULDER BOLT
BRACKET (PTT) (39 parts) BRACKET (PTT)
Ref OEM Part # Part Name
1 3Z0Q77211-2 CLAMP BRACKET (PTT-R)
2 3Z0Q77212-0 CLAMP BRACKET (PTT-L)
3 3Z0-77115-0 TRIM LOCK PIN
4 3P0-66233-0 WASHER8. 1-16-1.5
5 3V5-62442-0 NYLON NUT8-P1.25
6 3H6-60218-0 ANODE
7 910103-5616 BOLT
8 3AA-62116-0 WASHER 22-36-1
9 3AA-62114-1 PLATE
10 346-62127-0 CAP NUT
11 3BAQ77208-0 SWIVEL BRACKET ASSY
12 344-67177-1 GREASE FITTING
13 3Z0-62476-2 TILT STOPPER
14 369-62433-1 TILT STOPPER GRIP
15 353-63207-0 COLLAR 10.2-12-12
16 9401E3-1000 WASHER
17 951403-3516 SPRING PIN 3.5-16
18 3R0-62473-0 TILT STOPPER SPRING
20 9101E3-0616 BOLT
23 398-62396-1 GROUND L=130
24 910103-5612 BOLT
25 3BAQ77151-1 PT ASSY
26 3KY-77071-0 CYLINDER PIN (UPPER)
28 3R0-77076-0 BUSHING 13-17-19.5
29 9101E3-0612 BOLT
30 345-05122-1 WASHER 6.5-23-1.5
31 3Z0-77101-1 CYLINDER PIN (LOWER)
32 3Z0-77076-0 BUSHING 13-16-31
33 307-62116-1 WASHER 8.5-28-1
34 9101E3-0820 BOLT
35 3Z0-84398-0 BAND 203
36 3BJ-72120-0 RIGGING BOLT SET
37 9101E3-0885 * BOLT
38 9301E3-0800 * NUT
39 9401E3-0800 * WASHER
40 3C8-77217-0 CLAMP SCREW KIT
41 3C8-77216-0 * CLAMP SCREW (PTT)
42 332-62101-1 * CLAMP SCREW PAD
43 3C8-62107-0 * SHOULDER BOLT
CARBURETOR (39 parts) CARBURETOR
Ref OEM Part # Part Name
1 3FS-03100-0 CARBURETOR ASSY
2 3Y0-03120-0 * FLOAT CHAMBER
3 3V1-03121-0 * FLOAT CHAMBER GASKET
4 922503-6412 * SCREW
5 3C8-03125-0 * FLOAT
6 3C8-03126-0 * FLOAT ARM PIN
7 921703-0406 * SCREW
8 3V1-03147-1 * FLOAT VALVE
9 3FS-04488-0 * MAIN JET (#88)
10 3BJ-04421-0 * MAIN JET (#121)
11 3FS-04543-0 * SLOW JET (#43)
12 3FS-03141-0 * MAIN NOZZLE φ2.8
13 3V1-03169-0 * PLUG
14 3V2-03169-0 * PLUG
15 3V1-03116-0 * O-RING
16 3V1-03128-0 * PLATE
17 922503-0305 * SCREW
18 3BJ-03181-0 * CARBURETOR COVER
19 3BJ-03182-0 * CARBURETOR COVER GASKET
20 922503-6410 * SCREW
21 3V2-03179-0 * STOP SCREW L=18
22 3V1-03179-0 * STOP SCREW L=15
23 3V2-03157-0 * SPRING L=14
24 3V1-03191-0 * NUT
25 3V1-03192-0 * DRAIN SCREW
26 3V1-03193-0 * GASKET
27 3AA-03189-0 * RETAINING RING
28 3AA-03190-0 * CAP
29 3AA-03311-0 * RUBBER BOOT
30 3BJ-03315-0 * PLUNGER COMPLETE
31 3BJ-03314-0 * COIL SPRING
32 3Y0-03197-0 * DIAPHRAGM COVER
33 3AA-03192-0 * DRAIN SCREW
34 3AA-03193-0 * GASKET
35 921503-0410 * SCREW
36 3FS-03198-0 * CHECK VALVE
37 3BJ-02234-0 * FILTER
38 3H8-07632-0 * O-RING 1.5-10.7
39 3BJ-03243-0 * O-RING
COMPONENT PARTS OF REMOTE CONTROL (50 parts) COMPONENT PARTS OF REMOTE CONTROL
Ref OEM Part # Part Name
1 3B7Q84340-3 REMOTE CONTROL HEAD ASSY (RC5B)
2 921603-0512 * SCREW
3 353-76037-0 * CABLE TERMINAL PLUG
4 3A3-84432-0 * BUSHING
5 3A3-84375-0 * SCREW
6 3A3-84374-0 * SPACER
7 353-84371-0 * WASHER
8 930103-0600 * NUT
9 3A3-84383-0 * WASHER
10 3A3-84421-0 * ROLLER
11 3A3-84422-0 * THRUST PLATE
12 3A3-84431-0 * BUSHING
13 940103-0800 * WASHER
14 3A3-84442-0 * BOLT
15 353-84388-0 * DETENT ROLLER
16 3B7Q84312-0 * FREE THROTTLE LEVER
17 921503-0406 * SCREW
18 3A3-84423-0 * DETENT RETAINER
19 921603-0518 * SCREW
20 3A3-84307-0 * DETENT SPRING
21 3A3-84424-0 * FREE THROTTLE ROLLER
22 3A3-84426-0 * ROLLER RETAINER
23 3A3-84425-0 * FREE THROTTLE SPRING
24 3A3-84365-1 * THROTTLE ARM
25 3A3-84428-0 * THROTTLE FRICTION ARM
26 945303-0600 * E-RING d=6
27 353-84394-0 * WASHER
28 3A3-84427-0 * ADJUST SCREW
29 3A3-84381-0 * SHIFT GEAR ASSY
30 3A3-83314-2 * CABLE TERMINAL
31 3A3-84364-2 * DRIVE GEAR
32 3A3-84429-0 * WIRE COVER
33 930103-0500 * NUT
34 910103-0525 * BOLT
35 3A3-84376-0 * GROMMET
36 3B7Q84441-0 * REAR HOUSING
37 3B7Q84366-0 * REAR PANEL
38 3A3-84401-0 * NEUTRAL LOCK ARM
39 3A3-84403-0 * NEUTRAL LOCK SPRING
40 3A3-84407-0 * WASHER
41 921503-0510 * SCREW
42 3A3-84451-0 * TILT SWITCH COVER
43 3A3-84404-0 * GRIP
44 3B7Q84343-0 * CONTROL LEVER
45 3A3-84452-0 * TILT SWITCH PLUG
46 3A3-84368-0 * WAVE WASHER
47 3A3-84391-0 * FREE THROTTLE DRUM
48 3A3-84435-0 * BUSHING
49 3A3-84406-0 * PLATE
50 3A3-81301-0 TWIN REMOTE CONTROL KIT
COMPONENT PARTS OF REMOTE CONTROL (ELECTRIC PARTS) (17 parts) COMPONENT PARTS OF REMOTE CONTROL (ELECTRIC PARTS)
Ref OEM Part # Part Name
1 353-76020-3 MAIN SWITCH ASSY
2 3F3-76219-0 * MAIN SWITCH KEY No.303
3 3A3-76086-1 NEUTRAL SWITCH (REMOTE CONT)
4 921503-5316 SCREW
5 3A3-72560-0 PTT SWITCH ASSY
6 921503-0206 SCREW
7 3A3-72591-0 PTT SWITCH COVER
8 3C8-76171-0 OVERHEAT BUZZER
9 3A3-06830-0 STOP SWITCH ASSY
10 353-06821-0 * STOP SWITCH LANYARD ASSY
11 3A3-76115-1 CORD ASSY L=6200
12 353-72546-0 ASSIST CORD (RED) L=200
13 3N5-84336-0 SHIFT POSITION DECAL
14 3N5-84465-0 SHIFT POSITION SIDE DECAL
15 3N5-84333-0 DECAL (TOHATSU)
16 3N5-84331-0 DECAL (LEVER)
17 3A3-84398-0 BAND
CYLINDER HEAD・OIL PUMP (40 parts) CYLINDER HEAD・OIL PUMP
Ref OEM Part # Part Name
1 3BKB01000-0 CYLINDER HEAD COMPLETE
2 3BKB01001-0 * CYLINDER HEAD ASSY
3 345-01111-0 ** DOWEL PIN 6-12
4 3H8-07025-0 * OIL SEAL 18-35-8
5 3BK-07810-0 * CAMSHAFT ASSY
6 3AE-07235-0 * ROCKER ARM
7 3R0-07238-0 * ADJUSTING SCREW
8 3H8-07237-0 * ADJUSTING NUT
9 3Y2-07920-0 * ROCKER ARM SHAFT
10 3H8-07225-0 * ROCKER SHAFT SPRING L=30
11 3H8-07229-0 * ROCKER SHAFT SPRING L=50
12 3R3-07227-0 * WASHER 13.2-21.8-2
13 3H8-07239-0 * COLLAR 13.1-15.9-22.5
14 3AE-07895-0 * INTAKE VALVE KIT
15 3AE-07901-0 ** INTAKE VALVE
16 3AE-07921-0 ** RETAINER
17 3AE-07923-0 ** COTTER
18 3AE-07896-0 * EXHAUST VALVE KIT
19 3AE-07902-0 ** EXHAUST VALVE
20 3AE-07203-0 * VALVE SPRING L=35
21 3H6-07205-0 * VALVE SPRING SEAT
22 3R3-07204-0 * INTAKE VALVE STEM SEAL
23 3R3-07206-0 * EXHAUST VALVE STEM SEAL
24 3H8-07600-0 * OIL PUMP ASSY
25 3H8-07639-0 ** O-RING
26 3H8-07632-0 * O-RING 1.5-10.7
27 3H8-07631-0 * O-RING 1.5-8.5
28 3H8-07635-0 * O-RING 1.5-15.5
29 9101F4-5635 * BOLT
30 3BJ-01005-0 CYLINDER HEAD GASKET
31 3H8-01013-0 CYLINDER HEAD BOLT 8-60
32 9161F4-0625 BOLT
33 9161F9-0640 BOLT
34 9401E3-0600 WASHER
35 3BKB01021-0 CYLINDER HEAD COVER
36 3BJ-01024-0 CYLINDER HEAD COVER GASKET
37 9101F4-5630 BOLT
38 3R0-71015-1 OIL FILLER CAP
39 3R0-07422-0 O-RING 3.1-24.4
40 9701-1-1103 SPARK PLUG (DCPR6E)
CYLINDER・CRANK CASE (46 parts) CYLINDER・CRANK CASE
Ref OEM Part # Part Name
1 98AB-50-110 HOSE
2 338-02215-0 CLIP φ10
3 3BJB01100-1 CYL BLOCK & CRANKCASE ASSY
4 3H8-07636-0 * OIL FILTER BOLT
5 3H8-02093-0 * NIPPLE 10-32
6 345-01111-0 * DOWEL PIN 6-12
7 3H8-01012-1 * CYLINDER HEAD BOLT 8-50
8 9161F9-0630 * BOLT
9 9401E3-0600 * WASHER
10 3BJ-07615-0 OIL FILTER
11 3C7-01513-2 HANGER
12 9101E4-0820 BOLT
13 9402E3-0800 WASHER
14 3SA-01030-0 THERMOSTAT
15 3H6B01031-0 THERMOSTAT CAP
16 346-01032-0 THERMOSTAT CAP GASKET
17 9101E3-5650 BOLT
18 3AL-76079-0 COLLAR 6.2-9-9.55
19 3BJ-06869-0 BRACKET
20 3BJ-84398-0 BAND
21 3BJB02301-0 EXHAUST COVER (OUTER)
22 3R3-02305-0 EXHAUST COVER GASKET
23 9101F4-5625 BOLT
24 369-60218-1 ANODE
25 910103-0616 BOLT
26 3H8B01143-1 ANODE PLUG
27 3R3-01144-0 GASKET
28 9101E3-5620 BOLT
29 3R3B07431-0 BREATHER CHAMBER COVER
30 3R3-07432-1 GASKET
31 3R3-07430-0 SCREW 6-20
32 309-06972-0 CLAMP 6.5-47.5P
33 98AB-70-120 HOSE
34 3C7-02215-0 CLIP φ12
35 3V2-07620-0 PLUNGER ASSY
36 3H8-07629-0 PLUNGER ASSY COVER
39 398-06972-0 CLAMP 6.5-67P
41 3Z5-06972-1 CLAMP 7-120P
42 910103-5612 BOLT
43 345-06915-0 CLAMP 6.5-14L
44 921503-0616 SCREW
45 3V9-07402-1 OILPAN GASKET
46 3BJ-61017-1 BOLT 8-P1.25
47 3R3-07710-1 OIL STRAINER ASSY
48 369-84398-0 BAND 158
49 98AH-95-150 HOSE
DRIVE SHAFT HOUSING (34 parts) DRIVE SHAFT HOUSING
Ref OEM Part # Part Name
1 3BKQ61030-1 DRIVE SHAFT HOUSING ASSY (L)
2 3V9-07440-0 GUIDE PLATE
3 910103-5612 BOLT
4 350-01215-1 OIL SEAL 12.8-25-7
6 3R3-07405-1 DRAIN BOLT 14-20
7 3R3-07406-0 WASHER 14.5-24-1
8 3R3-67017-0 GROMMET 20-60
9 345-01111-0 DOWEL PIN 6-12
10 3V6-66037-0 CAM ROD HOLDER
11 9101E3-5620 BOLT
12 3BJ-61207-0 IDLE EXHAUST PORT GROMMET
13 3BJQ61208-0 IDLE EXHAUST PORT COVER
14 3BJ-62114-0 PLATE
15 9101E3-0512 BOLT
16 3BJ-61220-0 IDLE EXHAUST PORT GASKET
17 9101F4-5616 BOLT
18 3R3-67116-0 ENGINE BASEMENT SEAL L=835
19 3BJQ61110-0 EXTENSION HOUSING
20 3BJ-61111-0 STUD
21 3BJ-60003-0 DRIVE SHAFT BUSHING
22 3V1-64332-0 STOPPER
23 9101E3-5612 BOLT
24 3Z0-65203-0 LOCK PLATE
25 3V1-65204-0 WATER PIPE AUXILIARY MOUNT 13-2.5
26 9215E3-0510 SCREW
27 3R3Q67003-1 DRIVE SHAFT HOUSING COVER (R)
28 3R3Q67004-1 DRIVE SHAFT HOUSING COVER (L)
29 3R3-61213-0 SEAL L=360
30 3R0-61217-0 TAPPING SCREW 6-60
31 3H8-65110-0 WATER PIPE (L)
32 3R3-65204-0 WATER PIPE AUXILIARY MOUNT
33 3R3-65206-1 WATER PIPE SEAL (UPPER)
34 3P0-66233-0 WASHER 8.1-16-1.5
35 9301E3-0800 NUT
FUEL TANK (24 parts) FUEL TANK
Ref OEM Part # Part Name
1 3H6-70200-2 PRIMER BULB ASSY
2 3C7-70220-1 * JOINT ASSY (INLET)
3 3C7-70224-1 * JOINT ASSY (OUTLET)
4 3GF-70211-1 * PRIMER BULB
5 3C7-70217-0 * CLAMP
6 98AB-70-700 * HOSE
7 98AB-701600 * HOSE
8 3GR-70280-0 * FUEL CONNECTOR MARK
9 3GF-70281-0 * FUEL CONNECTOR
10 3GR-70250-0 * FUEL CONNECTOR
11 332-70201-0 * CLAMP
12 3B2-70167-1 FUEL TANK ASSY 12L
13 3V1-70167-2 FUEL TANK ASSY 12L
14 3B2-70050-1 * FUEL GAUGE VENT CAP ASSY (12L)
15 3AC-70052-1 * FUEL TANK CAP ASSY
16 3AC-70055-0 * RETAINING RING
18 3B2-70155-0 * PICK-UP ELBOW ASSY (12L)
19 3E0-70270-0 * QUICK-CONNECTOR (MALE)
20 3C7-70199-0 * O-RING
21 3C7-70113-0 * FILTER
22 3V1-70157-0 * FUEL PICK-UP ASSY W/GAUGE
23 3AC-70140-0 * SCREW
24 3AC-70145-0 * WASHER
25 3AC-70150-0 * GASKET
GEAR CASE (62 parts) GEAR CASE
Ref OEM Part # Part Name
1 3BJQ60000-1 GEAR CASE ASSY
2 3BJ-60211-0 * ROLLER BEARING
4 332-60005-2 PLUG 8-8
5 332-60006-0 GASKET 8.1-15-1
6 3BJQ60100-1 PROPELLER SHAFT HOUSING ASSY
7 3BKQ60101-1 * PROPELLER SHAFT HOUSING
8 362-60211-0 * ROLLER BEARING 17-24-20
9 3BJ-60215-0 * BALL BEARING 6205HS
10 121-32071-0 * O-RING 2.4-59.6
11 346-65013-0 * OIL SEAL 17-30-9
12 3BJ-60108-0 PRE-COATED BOLT
13 3V1-60217-0 TRIM TAB
14 9101E3-5620 BOLT
15 3BJ-64010-0 BEVEL GEAR ASSY (A)
16 3BJ-64020-0 BEVEL GEAR B
17 346-64027-1 NUT
18 3BJ-64030-0 BEVEL GEAR C
19 350-64032-0 WASHER 17.1-22-1.5
20 3BA-64211-0 PROPELLER SHAFT
21 3BJ-64215-0 CLUTCH
22 350-64218-0 PIN φ5-30
23 350-64219-0 SNAP
24 332-64221-0 SPRING
25 350-64222-1 SPRING RETAINER
26 3BJ-64223-0 PUSH ROD
27 965002-0803 BALL 3/8
28 362-60206-1 WATER STRAINER
29 921503-0430 SCREW
30 930403-0400 NYLON NUT 4-P0.7
31 369-60206-0 WATER STRAINER
32 9218E3-0620 SCREW
33 334-65021-0 WATER PUMP IMPELLER
34 350-65022-0 KEY φ2-16
35 350-65016-1 PUMP CASE (UPPER)
36 350-65011-1 PUMP CASE LINER
37 350-65014-0 WATER PIPE SEAL (LOWER)
38 3BJ-65017-0 PUMP CASE (LOWER)
39 332-60223-0 OIL SEAL 13.8-26-9.5
41 3FS-65029-0 GUIDE PLATE GASKET
42 350-65025-0 WATER PUMP GUIDE PLATE
43 9101E3-5652 BOLT
44 346-64084-0 SHIM 35-41.9-0.5
45 3BK-64303-0 DRIVE SHAFT (UL)
46 3BJ-60213-0 BALL BEARING 7302A
47 3BH-66014-0 CAM ROD (UL)
48 3AC-66011-1 CLUTCH CAM
49 951407-0312 SPRING PIN 3-12
50 951407-2512 SPRING PIN
51 398-66031-0 CAM ROD BUSHING
52 332-66021-0 O-RING 2.4-5.8
53 336-62415-0 O-RING 3.5-36
54 332-66033-0 STOPPER
55 9101E3-5512 BOLT
56 9301E3-0800 NUT
57 3P0-66233-0 WASHER 8.1-16-1.5
58 3V9-87326-0 PROPELLER HARDWARE KIT
59 362-64231-0 * THRUST HOLDER
60 346-64124-5 * WASHER 12.5-32-2.5
61 346-64121-5 * PROPELLER NUT
62 951503-0322 * SPLIT PIN 3-22
63 3Z0B64514-3 PROPELLER ASSY (7")
64 346-60984-0 SUB-WATER INLET HOSE PLUG
INTAKE MANIFOLD・FUEL PUMP (44 parts) INTAKE MANIFOLD・FUEL PUMP
Ref OEM Part # Part Name
1 3BJ-02091-0 INTAKE MANIFOLD
2 3BJ-02104-0 INTAKE MANIFOLD GASKET
3 9161F4-0645 BOLT
4 9401E3-0600 WASHER
5 345-06915-0 CLAMP 6.5-14L
6 910103-5612 BOLT
7 345-01111-0 DOWEL PIN 6-12
8 309-06972-0 CLAMP 6.5-47.5P
9 3BJ-76050-0 CHOKE SOLENOID
10 361-76073-0 * PLUNGER
11 921503-6406 SCREW
12 951403-0312 SPRING PIN 3-12
13 3BJ-76057-0 CHOKE SOLENOID HOOK
14 3BJ-76078-0 CHOKE SOLENOID BRACKET ASSY
15 3BJ-67152-0 * CHOKE LEVER
16 3BJ-83821-0 * SCREWM 5-6
17 3BJ-63721-0 * BUSHING 8.1-15-2.9
18 3BJ-05245-0 * WASHER 8.1-15-1.3
19 940103-0400 * WASHER
20 930103-0400 * NUT
21 3BJ-76076-0 LINK ROD
22 3V1-67196-0 ROD SNAP 1.5-2
23 921503-0510 SCREW
24 3BJ-02011-0 CARBURETOR GASKET
25 3FS-03952-0 INSULATOR
26 3BJ-02409-0 INTAKE SILENCER ASSY
27 3R0-03215-0 BOLT 6-100
28 940103-0600 WASHER
29 3BJ-06283-0 COLLAR 6.1-9-7.4
30 3A0-76079-0 COLLAR 6.2-9-7.4
31 3BJ-02419-0 SEAL RING 2.4-35
32 3BH-67192-0 CHOKE ROD
33 3BJ-67196-0 ROD SNAP 3.2-2
34 3BJ-07735-1 BREATHER HOSE L=290
35 3BA-07735-0 BREATHER HOSE L=50
36 98AL-30-200 HOSE
37 369-70098-2 CLIP φ7
38 3BJ-01176-1 NIPPLE 3.5-2-4.5
39 3H8-04000-1 FUEL PUMP ASSY
40 3H8-62415-0 O-RING 3.5-25.7
41 910103-5625 BOLT
42 98AB-50-260 HOSE
43 3BJ-02160-0 FUEL HOSE W/PROTECTOR L=260
44 3GT-35143-0 CLIP φ9.4
MAGNETO・ELECTRIC PARTS (84 parts) MAGNETO・ELECTRIC PARTS
Ref OEM Part # Part Name
1 3BJ-06191-0 FLYWHEEL W/RING GEAR
2 3BJ-06023-0 ALTERNATOR ASSY
3 3BJ-06071-0 PULSAR COIL
5 3T5-10131-0 KEY
6 931121-1600 NUT
7 3H8-00133-0 WASHER 16-27-3.2
8 910103-5514 BOLT
9 921503-6630 SCREW
10 940203-0600 WASHER
11 3V6-06008-0 COIL BRACKET
12 3AD-06864-0 PRE-COATED BOLT 6-25
13 345-01111-0 DOWEL PIN 6-12
14 3BJ-06060-1 CD UNIT
15 3V1-60108-0 PRE-COATED BOLT 6-16
17 3BJ-06167-0 CD UNIT CORD ASSY
18 3KY-07612-0 * GROMMET
20 3A3-76037-0 CABLE TERMINAL PLUG
21 3BJ-06061-0 CD UNIT BRACKET
22 3T5-06920-0 RUBBER MOUNT 8.5-18-7
24 3BJ-06303-0 COLLAR 6.2-9-8.7
27 3Z0-72580-0 PTT SOLENOID SWITCH (A)
28 910103-5620 BOLT
29 3BA-76174-0 STAY
31 3BA-72582-0 SOLENOID SWITCH CORD (A) L=300
33 3C8-72583-1 SOLENOID SWITCH CORD (B) L=150
34 3Y1-76145-0 TERMINAL CAP 8-13-28
35 3BJ-72569-0 EXTENSION CORD (PTT)
36 3BJ-06901-0 BRACKET
37 3AC-06920-0 RUBBER MOUNT 11.8-14-1.5
38 3C8-66308-0 WASHER 6-16-1.5
39 3A0-76079-0 COLLAR 6.2-9-7.4
40 910103-0620 BOLT
42 3BJ-06040-0 IGNITION COIL W/R-CAP
43 3AC-06999-0 * PLUG CAP W/RESISTANCE
45 3H6-07611-0 OIL PRESSURE SWITCH
46 3C8-76010-1 STARTER MOTOR ASSY
47 3C8-76015-0 * PINION ASSY
48 3C8-75015-0 * WASHER
49 3C8-75014-0 * BRUSH HOLDER ASSY
50 921521-6408 * SCREW
51 3C8-75016-0 * BUSHING
52 3C8-75017-0 * BUSHING
53 3C8-75018-0 * O-RING
54 940103-0600 * WASHER
55 941303-0600 * SPRING WASHER
56 930203-0600 * NUT
57 3C8-75019-0 * BOLT
58 941321-0500 * SPRING WASHER
59 940221-0500 * WASHER
60 3BJ-76009-0 STARTER MOTOR BAND
61 3C8-76007-0 DAMPER
62 910103-5825 BOLT
63 910103-5818 BOLT
64 3BJ-76040-0 STARTER SOLENOID
65 910103-5610 BOLT
66 3BJ-76043-0 STARTER SOLENOID BRACKET
68 3BJ-76060-1 RECTIFIER COMPLETE
69 309-06972-0 CLAMP 6.5-47.5P
70 3BJ-76164-0 BAND MOUNT
71 3Z0-84398-0 BAND 203
72 910103-5625 BOLT
73 3BH-76120-0 BATTERY CABLE
74 3BJ-06133-0 PROTECTOR φ10.7-320
76 3BJ-76145-0 TERMINAL CAP 15.5-20-28
77 3R3-76141-0 STARTER CABLE L=270
78 3BA-06133-0 PROTECTOR φ10.7-180
79 3Y0-76145-0 TERMINAL CAP 8-18-28
80 3AA-76145-0 TERMINAL CAP 13-13-28
81 3V1-06133-0 PROTECTOR φ24-70
82 369-84398-0 BAND 158
83 3BH-06133-0 PROTECTOR
84 3V1-76066-0 FUSE WIRE ASSY L=185
86 3BJ-76066-0 FUSE WIRE ASSY L=720
87 3T5-76247-0 * FUSE 20A
88 3BJ-76064-0 FUSE HOLDER BRACKET
90 3BJ-76110-0 CORD ASSY
91 3BJ-84398-0 BAND
92 3BJ-06281-1 CABLE TERMINAL HOLDER
93 174-35012-0 COLLAR 6-8-6
94 910103-5616 BOLT
95 910103-5612 BOLT
96 3BJ-06902-1 COVER
97 3BK-72028-2 WIRING DIAGRAM DECAL
98 3B7-06305-0 RUBBER MOUNT 9-16-4.3
OPTIONAL PARTS・ACCESSORIES (22 parts) OPTIONAL PARTS・ACCESSORIES
Ref OEM Part # Part Name
1 3BJ-72100-0 TOOL KIT
2 3B7-72201-0 SAFETY ROPE φ5-1600
3 3BJ-76160-2 RECTIFIER KIT
4 3BJ-76060-1 * RECTIFIER COMPLETE
5 309-06972-0 * CLAMP 6.5-47.5P
6 3BJ-76164-0 * BAND MOUNT
7 3Z0-84398-0 * BAND 203
8 910103-5625 * BOLT
9 3A3-76037-0 * CABLE TERMINAL PLUG
10 3BJ-76161-0 * EXTENSION CORD L=3000
11 3T5-76249-0 * FUSE 30A
12 3BJ-76064-0 * FUSE HOLDER BRACKET
13 3N8-72640-1 TACHOMETER W/OIL LAMP
14 3B7-72658-0 * OIL BULB 12V-1.7W
20 3B7-72530-2 TACHOMETER ASSY
21 3B7-72659-0 * METER BULB 12V-1.8W
22 3B7-72656-0 * METER DAMPER
23 3B7-72661-0 *FITTING PLATE
24 930103-0500 * NUT
25 941303-0500 * SPRING WASHER
26 361-72539-0 TACHOMETER LEAD WIRE L=6000
27 336-60007-0 FLUSHING PLUG
PISTON・CRANK SHAFT (14 parts) PISTON・CRANK SHAFT
Ref OEM Part # Part Name
1 3R3-00121-0 OIL SEAL 32-44-9
2 3BJ-00121-0 OIL SEAL 36-50-7
3 3R0-00040-0 CONNECTING ROD ASSY
4 3H6-00059-0 * CONNECTING ROD BOLT
5 3BJ-00030-0 CRANKSHAFT ASSY
6 3AE-07408-0 PLAIN SHAFT BEARING
7 3FS-87130-0 PISTON REPAIR KIT
8 3AE-00001-1 * PISTON
9 3AE-00021-0 * PISTON PIN
10 3H6-00024-0 * PISTON PIN CLIP
11 3FS-87123-0 PISTON RING SET
12 3AC-00011-0 * PISTON RING
13 3AC-00012-0 * PISTON RING
14 3AC-00013-0 * PISTON RING-OIL
POWER TILT (32 parts) POWER TILT
Ref OEM Part # Part Name
1 3Z0-77221-0 CAP ASSY
3 3BA-77175-0 MANUAL VALVE ASSY
4 3R0-77177-0 * O-RING 2.4-9.8
6 3R0-77171-0 C-RING
7 3AC-77173-0 SEAL WASHER
8 3BA-77450-0 RELIEF VALVE ASSY
9 3Z0-77179-0 * O-RING
10 3Z0-77460-0 VALVE ASSY
11 3R0-77451-0 * O-RING 1.5-3.5
12 3B7-77169-0 O-RING
13 3B7-77430-0 PUMP
14 3B7-77432-1 BOLT
15 3B7-77431-1 BOLT
16 3B7-77434-1 FILTER
17 3E0-77163-0 COUPLING
18 3R0-77167-0 O-RING 2-62.5
19 3Z1-84398-1 BAND
20 3V1-64333-0 PRE-COATED SCREW 5-12
21 3Z0-77431-0 BOLT
22 3BA-77180-0 MOTOR ASSY
23 3BA-77192-0 * MOTOR BRACKET ASSY
24 3Z0-77191-0 ** BREAKER
25 3Z0-77187-0 ** BREAKER HOLDER
26 3Z0-77167-0 ** O-RING
27 3E0-77183-0 ** BRUSH
28 3E0-77184-0 ** BRUSH SPRING
29 921521-5512 ** SCREW
30 3Z0-77186-0 ** BRUSH HOLDER
31 3E0-77193-0 ** OIL SEAL
32 3Z0-77190-0 * ARMATURE ASSY
33 9215E3-5512 * SCREW
34 3Z0-77195-0 * YOKE ASSY
PULLEY・TIMING BELT (10 parts) PULLEY・TIMING BELT
Ref OEM Part # Part Name
1 3AC-07421-0 OIL LEVEL GAUGE
2 3BJ-10060-0 DRIVE PULLEY
4 3BJ-10063-0 BELT GUIDE
5 3BJ-10069-0 LOCK WASHER
6 3T5-10068-2 NUT
7 3H8-10062-2 DRIVEN PULLEY
8 309-00131-0 KEY 10-3.7-3
9 3AA-60108-0 PRE-COATED BOLT 6-20
10 3H8-10066-0 WASHER 6.5-19-3.2
11 3H8-10061-0 TIMING BELT
RECOIL STARTER (32 parts) RECOIL STARTER
Ref OEM Part # Part Name
1 3BJ-05090-0 RECOIL STARTER ASSY
2 3BJ-05105-0 * STARTER CASE
3 3H8-05004-0 * STARTER SPRING
4 3BJ-05104-0 * REEL
5 3BJ-05135-0 * BUSHING
6 3BJ-05003-0 * RATCHET
7 3BJ-05913-0 * TAPPING SCREW
8 3R3-05012-0 * RETURN SPRING
9 3H8-05123-1 * RETURN SPRING
10 3R3-05007-0 * FRICTION SPRING
11 3R3-05006-0 * FRICTION PLATE
12 3R3-05138-0 * BOLT
13 3R3-05013-0 * STARTER ROPE φ5-1800
14 3BJ-05019-0 * STARTER HANDLE
15 3AB-05131-0 * ROPE ANCHOR
16 3R3-05252-0 * STARTER LOCK
17 3R3-05216-0 * STARTER LOCK SPRING
18 3AC-05258-0 STARTER LOCK CAM SPRING
19 3BJ-05207-0 STARTER LOCK WIRE
20 3SA-67503-0 STARTER SEAL
21 3NV-72181-0 CAUTION DECAL (B)
22 3F3-76042-2 NUT
24 3AL-60108-0 PRE-COATED BOLT 6-20
26 3V2-06157-0 PROTECTOR φ12-120
27 369-84398-0 BAND 158
28 3R3-06308-0 BELT COVER
29 910103-0630 BOLT
30 3C8-66308-0 WASHER 6-16-1.5
31 3R3-06302-0 RUBBER MOUNT
32 3R3-06303-1 COLLAR 6.2-9-21
33 910103-0620 BOLT
34 3BJ-06283-0 COLLAR 6.1-9-7.4
REMOTE CONTROL PARTS (40 parts) REMOTE CONTROL PARTS
Ref OEM Part # Part Name
1 3E0-84905-0 DRAG LINK ASSY
2 3E0-84914-0 * SPACER 9.6-19-13
3 3E0-84917-0 * BOLT 3/8-50
4 353-84918-0 * NYLON NUT 3/8-24UNF
5 353-84916-0 * WASHER 9.6-18-2
6 3F3-84908-0 * SEAL RING
7 3SAQ83880-0 REMOTE CONTROL FITTING ASSY
8 3R3Q67482-0 * REMOTE CONTROL CABLE STAY
9 9101E3-5620 * BOLT
10 3R3-67483-1 * REMOTE CONT CABLE STAY COVER
11 3BJ-67485-0 * BOLT 6-35
12 3BJ-83732-0 * GROMMET
13 3R3-83820-0 * CABLE CLIP ASSY
14 910103-5616 * BOLT
15 3R3-66128-0 * SHIFT ARM (REMOTE CONTROL)
16 3BJ-66134-0 * SHIFT LEVER ROD
17 930103-0500 * NUT
18 3BJ-66138-0 * SPACER 5-9.5-5
19 951503-0212 * SPLIT PIN 2-12
20 3R3-66129-0 * SHIFT LEVER (REMOTE CONTROL)
21 910103-0625 * BOLT
22 3C8-66308-0 * WASHER 6-16-1.5
23 353-76079-0 * COLLAR 6.2-9-9.3
24 3C8-63733-0 * ROD SNAP 5-3
25 3AA-83719-0 * WASHER 8.5-18-1.6
26 3B7-83715-2 * CABLE JOINT
27 3R3-63709-0 * THROTTLE ROD
28 346-67196-1 * ROD SNAP 3-B
29 3R3-83910-0 * THROTTLE LEVER (REMOTE CONT)
30 910103-0645 * BOLT
31 3R3-83913-1 * COLLAR 6.2-9-30.8
32 951603-0800 * SNAP PIN d=8
33 3BJ-83914-0 * THROTTLE LEVER STOPPER
34 3V5Q62001-0 * STEERING BRACKET
35 9161E3-1045 * BOLT
36 9401E3-1000 * WASHER
37 3BD-67192-0 * CHOKE ROD
38 369-83883-0 * SEPARATE CORD
39 910103-0612 * BOLT
40 3SP-83914-0 THROTTLE LEVER STOPPER
SHIFT (16 parts) SHIFT
Ref OEM Part # Part Name
1 3BJ-66145-0 HOLDER
2 3Y1-66113-0 SHIFT LEVER STOPPER t=0.5
3 3BA-66117-0 SHIFT LEVER STOPPER t=1.0
4 9101E3-5614 BOLT
5 3BJ-66130-0 SHIFT LEVER SHAFT ASSY
6 3R3-66122-0 SHIFT ARM
7 3R3-66110-0 SHIFT LEVER
8 3R3-66124-0 COLLAR 6.5-10.5-22.6
9 9101E3-5635 BOLT
10 3R3-66135-1 SHIFT LEVER SHAFT
11 3AZ-66211-0 SHIFT ROD
12 3AA-66241-0 SHIFT ROD JOINT
13 930103-0500 NUT
14 3BJ-66302-0 REVERSE LOCK LINK JOINT
15 921503-0616 SCREW
16 930403-0600 NYLON NUT
TILLER HANDLE (34 parts) TILLER HANDLE
Ref OEM Part # Part Name
1 3BKQ63003-2 TILLER HANDLE ASSY
2 3BHQ63003-0 * TILLER HANDLE ASSY
4 350-67154-0 ** PLASTIC RIVET 6.5
5 3B2-63104-1 ** STUD
6 3R3-63012-0 ** GRIP
7 3V1-63041-0 ** THROTTLE SHAFT
8 3H6-63048-0 ** THROTTLE SHAFT DAMPER
9 3H6-63510-0 ** BUSHING 14-15.8-7
10 920803-0518 ** SCREW
11 3B2-63063-0 ** THROTTLE SHAFT SUPPORT
12 9215E3-0612 ** SCREW
13 3V1-63035-1 ** FRICTION PIECE
14 3V1-63077-0 ** ADJUSTING NUT
15 3V1-63036-0 ** SPRING
16 910103-0625 ** BOLT
17 3V9-72019-0 ** THROTTLE DECAL
18 3BJ-72615-0 * PTT SWITCH ASSY
19 3V1-76032-0 * SWITCH BOX
20 9215E3-0516 * SCREW
22 9215E3-0512 * SCREW
23 3V1-63102-0 BUSHING
24 3V1-63108-1 WASHER 39-52-1
25 3SA-63107-0 COVER
26 930103-0600 NUT
27 940103-0600 WASHER
28 3V1-63600-0 THROTTLE WIRE
29 3V1Q62001-1 STEERING BRACKET
30 3V1-62004-0 CORD HOLDER
31 921503-0408 SCREW
32 3V2-62004-0 CORD HOLDER
33 336-06973-0 CLAMP 6-9.5L
34 9215E3-0510 SCREW
35 3R3-62094-2 BOLT 10-80
36 9401E3-1000 WASHER
TOP COWL (12 parts) TOP COWL
Ref OEM Part # Part Name
1 3SAQ67645-0 TOP COWL ASSY (SERVICE)
2 3SAQ67640-0 * TOP COWL SUB-ASSY
3 3SA-67517-0 ** ROLLER
4 940103-0600 ** WASHER
5 945303-0500 ** E-RING d=5
6 3SA-67501-0 ** TOP COWL SEAL
7 3SB-87801-0 * DECAL SET
8 3AC-72200-0 * STOP SWITCH DECAL
9 3BA-76199-0 * OIL PRESSURE DECAL
10 3BJ-67563-0 PTT DECAL
11 3R0-72180-0 CAUTION DECAL (A)
12 3SP-67573-0 SPORT DECAL

100-Hour / Annual Service Checklist

Regular maintenance keeps your Tohatsu MFS9.9/15/20D 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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