Tohatsu M25/30H/JET (2016) Parts & Diagrams

OEM and aftermarket replacement parts for Tohatsu M25/30H/JET. Scroll down for exploded parts diagrams (24), specifications, and maintenance reference.

Tohatsu M25/30H/JET (2016) Parts & Diagrams

🔎 Tohatsu M25/30H/JET Reference Library — Exploded parts diagrams (24 diagrams), specifications, common issues, and maintenance checklist.

The Tohatsu M25/30H/JET is a 25-30 HP 2-stroke outboard motor. Commonly used on jon boats, pontoons, and mid-size utility craft.

Quick Reference Specifications

Specification Value
Engine Type 2 Stroke
Horsepower 25-30 HP
Displacement Refer to Owner's Manual
Bore x Stroke Refer to Owner's Manual
Spark Plug (Type & Gap) Refer to Owner's Manual
Engine Oil Capacity Refer to Owner's Manual
Recommended Engine Oil TC-W3 Certified 2-Stroke Oil
Gear Case Oil Capacity Refer to Owner's Manual
Idle Speed (in gear) Refer to Owner's Manual
Full Throttle RPM Range Refer to Owner's Manual
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 M25/30H/JET:

  • 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
  • Fuel System Issues / Hard Starting: Stale fuel and ethanol-related deposits are common in 2-stroke carbureted engines. Clean or rebuild carburetors and replace fuel lines if deteriorated. → Recommended: Carburetor Repair Kit, Fuel Line Assembly
  • Spark Plug Fouling: 2-stroke engines are prone to spark plug fouling from oil residue, especially at low RPM. Replace plugs at each annual service. → Recommended: OEM Spark Plugs
  • 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
  • Thermostat Failure: A stuck thermostat can cause overheating or poor warm-up. Replace if operating temperature is inconsistent. → Recommended: Thermostat Assembly

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 M25/30H/JET.

ASSEMBLY・KIT PARTS (11 parts) ASSEMBLY・KIT PARTS
Ref OEM Part # Part Name
1 346Q87302-C LOWER UNIT ASSY (L)
2 3P1B87090-B ENGINE SHORT BLOCK KIT
3 922503-6414 * SCREW
4 3A1-87121-6 POWER HEAD GASKET SET
5 951603-0800 * SNAP PIN d=8
6 9101E3-5652 * BOLT
7 361-65239-0 * WATER PUMP GUIDE PLATE
8 3C8-66032-0 * O-RING 3.5-21.7
9 9161E3-0845 * BOLT
10 951403-0312 * SPRING PIN 3-12
11 941303-0800 * SPRING WASHER
BOTTOM COWL (37 parts) BOTTOM COWL
Ref OEM Part # Part Name
1 346Q67100-3 BOTTOM COWL
2 346-67113-0 MOUNT 8.5-14-2.5
3 346-67114-1 SPACER 6.2-9-15.7
4 338Q67141-0 HOOK LEVER
5 338-67147-0 SEAL RING 13.8-22-3.7
6 350-67105-0 HOOK LEVER BUSHING 14-16.5-17.7
7 3C8-67146-0 WASHER 14-22-1
8 941403-1400 WAVE WASHER d=14
9 345-67142-1 COVER HOOK
10 910103-0612 BOLT
11 3C8-66308-0 WASHER 6-16-1.5
12 346-67151-1 CHOKE ROD
13 951503-0212 SPLIT PIN 2-12
14 346-67152-0 CHOKE LEVER
15 346-67153-0 CHOKE LEVER BRACKET
16 910103-5612 BOLT
17 910103-0614 BOLT
18 941403-0600 WAVE WASHER d=6
19 930403-0600 NYLON NUT 6-P1.0
20 346-67104-0 CHOKE ROD BUSHING
21 345-67161-0 GROMMET 22-3
22 346-83732-0 GROMMET 68-20-3
23 353-67162-0 GROMMET 41-14-3
24 346-67161-0 GROMMET
25 3BA-01138-0 NIPPLE 6.8-3-10
26 398-06830-0 STOP SWITCH ASSY
27 353-06821-0 * STOP SWITCH LANYARD ASSY
28 336-06973-0 CLAMP 6-9.5L
29 921503-5612 SCREW
30 9101E3-0630 BOLT
31 346-67115-0 WASHER 6.5-21-1
32 910121-0612 BOLT
33 346-63061-2 THROTTLE SHAFT
34 345-63063-0 THROTTLE SHAFT SUPPORT
35 9101F4-0630 BOLT
36 940103-0600 WASHER
37 361-72026-0 SPARK PLUG DECAL (BR7HS10)
BRACKET (76 parts) BRACKET
Ref OEM Part # Part Name
1 3AEQ62112-2 CLAMP BRACKET (R)
2 3AEQ62113-2 CLAMP BRACKET (L)
3 3AC-62191-0 SWIVEL BRACKET SHAFT ASSY
4 346-62127-0 CAP NUT
5 349-62126-0 BUSHING
6 346-62124-1 NYLON NUT 7/8-14
7 346-62117-1 DISTANCE PIECE
8 930103-0600 NUT
10 9401E3-0600 WASHER
11 345-62121-1 THRUST ROD
12 345-62122-2 THRUST ROD SPRING
13 349Q62310-3 SWIVEL BRACKET
14 346Q62010-1 STEERING SHAFT ASSY
15 346-62412-1 * WASHER 22.6-30-2
16 945103-2200 * C-RING d=22
17 345-62417-0 BUSHING 26-32
18 345-62441-0 FRICTION PIECE
19 346-62421-1 FRICTION SPRING
20 9101E3-0830 BOLT
21 3A0-62423-2 THRUST PLATE (UPPER) 27-50-1
22 346-62424-1 THRUST PLATE (LOWER) 26.5-46-1
23 3H8-62415-0 O-RING 3.5-25.7
24 945103-2500 C-RING d=25
26 344-67177-1 GREASE FITTING
27 346-61323-0 LOCK PLATE
28 346-61302-1 RUBBER MOUNT (LOWER)
29 346-61301-1 RUBBER MOUNT (UPPER)
30 346-61307-2 BOLT 10-83
31 346Q61411-2 MOUNT BRACKET
32 9401E3-1000 WASHER
33 346-61321-2 BOLT 10-105
34 345-61322-2 WASHER 10.1-18-2.5
35 346-61336-0 DAMPER (LOWER)
36 346-61333-0 DAMPER (UPPER)
37 346-61334-0 WASHER 21-35.7-3
38 346-61335-0 LOCK PLATE 20-31.7-3
39 346-61312-1 RUBBER MOUNT RETAINER
41 930103-1000 NUT 10-P1.5
42 398-62396-1 GROUND L=130
44 3B7-60218-1 ANODE
45 910103-5630 BOLT
46 346-61337-0 DAMPER (UPPER)
47 349Q62993-2 TILT STOPPER
48 951403-0640 SPRING PIN
49 346-62437-0 BUSHING 10.2-12-29.5
50 346-62439-1 SETTING PLATE
51 9101E3-5820 BOLT
52 3C8-62421-1 FRICTION SPRING
53 346-62438-0 SETTING PIECE
55 3A3-62396-1 GROUND L=110
56 910103-5612 BOLT
57 346-66322-0 REVERSE LOCK
58 349-66313-0 REVERSE LOCK ARM
59 336-66319-1 PIVOT BOLT
61 346-66321-0 REVERSE LOCK ROD
62 951503-0212 SPLIT PIN 2-12
63 3P0-66311-0 REVERSE LOCK LEVER
65 3AL-05254-0 SHOULDER BOLT 6-8
66 3AL-05212-0 BUSHING 8.1-20
67 3AA-83719-0 WASHER 8.5-18-1.6
68 3R0-66308-0 WASHER 6-16-1.5
69 349-66312-0 REVERSE LOCK LINK
70 346-66323-1 REVERSE LOCK LEVER SPRING
71 3R0-66332-0 REVERSE LOCK SPRING (L)
72 3AL-66333-0 REVERSE LOCK LEVER GRIP
73 346-66334-0 STOPPER
74 916103-0885 BOLT
75 940103-0800 WASHER
76 930103-0800 NUT
77 3AAQ62105-0 CLAMP SCREW KIT
78 3AAQ62108-0 * CLAMP SCREW ASSY
79 3AA-62106-0 ** CLAMP SCREW
80 332Q62102-1 ** CLAMP SCREW HANDLE
81 3C8-62104-2 ** RIVET 3-22
82 332-62101-1 * CLAMP SCREW PAD
83 3C8-62107-0 * SHOULDER BOLT
CARBURETOR (24 parts) CARBURETOR
Ref OEM Part # Part Name
1 3P0-03200-0 CARBURETOR ASSY
2 353-03221-0 * FLOAT CHAMBER
3 922503-6414 * SCREW
4 346-03222-0 * FLOAT CHAMBER O-RING
5 346-03231-0 * FLOAT
6 346-03232-0 * FLOAT ARM PIN
7 3B7-03240-0 * FLOAT VALVE
8 334-03242-0 * VALVE PIN
9 344-03244-0 * CLIP
10 3F3-03234-0 * SCREW
11 3A1-03252-0 * MAIN NOZZLE
12 3A1-03251-0 * MAIN JET (#155)
13 346-03174-0 * THROTTLE LEVER COLLAR
14 346-03272-0 * THROTTLE LEVER
15 930131-0500 * NUT
16 941332-0500 * SPRING WASHER
17 3A1-03276-0 * SLOW JET (#85)
18 346-03256-0 * RUBBER CAP
19 346-03265-0 * STOP SCREW
20 346-03267-0 * SPRING
21 346-03266-0 * PILOT SCREW
22 346-03268-0 * SPRING
23 345-03292-0 * DRAIN SCREW
24 336-03293-0 * O-RING
COMPONENT PARTS OF REMOTE CONTROL (53 parts) COMPONENT PARTS OF REMOTE CONTROL
Ref OEM Part # Part Name
1 3B7Q84350-3 REMOTE CONTROL HEAD ASSY (RC5C)
2 3B7Q84360-1 REMOTE CONTROL HEAD ASSY (RC5D)
3 3A3-76037-0 * 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 921603-0512 * SCREW
22 3A3-84424-0 * FREE THROTTLE ROLLER
23 3A3-84426-0 * ROLLER RETAINER
24 3A3-84425-0 * FREE THROTTLE SPRING
25 3A3-84365-1 * THROTTLE ARM
26 945303-0600 * E-RING d=6
27 3A3-84381-0 * SHIFT GEAR ASSY
28 3A3-83314-2 * CABLE TERMINAL
29 3A3-84364-2 * DRIVE GEAR
30 3A3-84429-0 * WIRE COVER
31 930103-0500 * NUT
32 910103-0525 * BOLT
33 3A3-84376-0 * GROMMET
34 3B7Q84441-0 * REAR HOUSING
35 3B7Q84366-0 * REAR PANEL
36 3A3-84401-0 * NEUTRAL LOCK ARM
37 3A3-84403-0 * NEUTRAL LOCK SPRING
38 3A3-84407-0 * WASHER
39 921503-0510 * SCREW
40 3A3-84451-0 * TILT SWITCH COVER
41 3A3-84404-0 * GRIP
42 3B7Q84343-0 * CONTROL LEVER
43 3A3-84452-0 * TILT SWITCH PLUG
44 3A3-84368-0 * WAVE WASHER
45 3A3-84391-0 * FREE THROTTLE DRUM
46 3A3-84435-0 * BUSHING
47 3A3-84406-0 * PLATE
48 361-84414-0 * GROMMET
49 361-84415-0 * GROMMET
50 369-84416-0 * GROMMET
51 353-84321-0 * GROMMET
52 369-84418-0 * GROMMET
53 3A3-81301-0 TWIN REMOTE CONTROL KIT
COMPONENT PARTS OF REMOTE CONTROL (ELECTRIC PARTS) (13 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 3A3-06830-0 STOP SWITCH ASSY
6 353-06821-0 * STOP SWITCH LANYARD ASSY
7 361-76110-1 CORD ASSY
8 3N5-84331-0 DECAL (LEVER)
9 3N5-84333-0 DECAL (TOHATSU)
10 3N5-84336-0 SHIFT POSITION DECAL
11 3N5-84465-0 SHIFT POSITION SIDE DECAL
12 3A3-84398-0 BAND
13 398-06830-0 STOP SWITCH ASSY
CYLINDER・CRANK CASE (78 parts) CYLINDER・CRANK CASE
Ref OEM Part # Part Name
1 346B01100-6 CYL BLOCK & CRANKCASE ASSY
2 393-01131-0 * NIPPLE 5.5-5
3 393-01137-0 * NIPPLE 5-4-5
4 346-01137-0 * NIPPLE 7-7
5 336-01111-0 * DOWEL PIN 8.7-11.5-12.7
6 916124-0850 * BOLT
7 916124-0840 * BOLT
9 3A1B01001-2 CYLINDER HEAD ASSY
10 350-01093-0 * WELCH PLUG
11 3P0-01143-0 ANODE PLUG
12 3T5-10046-0 O-RING 1.9-13
13 3P0-60218-0 ANODE
14 921503-0530 SCREW
15 346-01005-3 CYLINDER HEAD GASKET
16 3KM-01012-0 CYLINDER HEAD BOLT
17 3C8-01015-0 WASHER 8.5-19.5-3.2
18 345-01030-0 THERMOSTAT
19 3H6B01031-0 THERMOSTAT CAP
20 346-01032-0 THERMOSTAT CAP GASKET
21 910103-5630 BOLT
22 3B7-76142-1 GROUND CABLE L=120
23 346B02301-0 EXHAUST COVER (OUTER)
24 346-02305-2 EXHAUST COVER GASKET
25 9101E3-5518 BOLT
26 98AB-50-250 HOSE φ5-φ10
27 9701-1-1015 SPARK PLUG (BR7HS10)
29 393-01160-0 CHECK VALVE
32 98AL-40-230 HOSE
33 3T5-01133-0 CLIP φ8
34 338-01133-0 CLIP φ7
36 346-01210-0 CRANKCASE HEAD
37 346-01215-0 OIL SEAL 16-28-6
38 346-01216-0 O-RING 1.7-59
39 9101F4-0616 BOLT
40 941303-0600 SPRING WASHER
41 346B05101-1 BRACKET
42 9153F4-0825 STUD
43 930121-0800 NUT
44 940121-0800 WASHER
45 3FG-05211-0 STARTER LOCK ARM
47 346-05212-0 BUSHING 6.2-16-7
48 921503-0620 SCREW
50 346-05213-1 THROTTLE LIMITER ARM
52 940103-0600 WASHER
53 346-05222-0 STARTER LOCK ROD
54 345-05224-0 ROD SNAP 5-2.5
55 345-05223-1 ROD SNAP 3.5-2
56 346-05221-1 THROTTLE LIMITER ROD 5-27L
62 3P0-63701-1 ADVANCER ARM ASSY
63 3KM-63104-0 STUD
64 345-63713-0 BUSHING 8-14-4
65 930403-0800 NYLON NUT 8-P1.25
66 334-66233-0 WASHER 8.1-16-1.5
67 921503-0525 SCREW
69 350-63717-1 ROD L=50
70 3B7-05243-0 BALL JOINT CONNECTOR
72 3P0-63718-0 THROTTLE CAM
73 921503-0616 SCREW
74 346-63721-0 BUSHING 6.2-16-5
75 3C8-66308-0 WASHER 6-16-1.5
76 941403-1000 WAVE WASHER d=10
77 346-63716-1 THROTTLE ROD
78 3P0-05223-0 ROD SNAP 3.5-2
79 348-63715-1 ROD 5-75L
80 346-05234-0 ROD JOINT φ5
81 930103-0500 NUT
82 3B7-63733-0 ROD SNAP 5-2.5
83 353-83728-1 PIN
84 930103-0600 NUT
85 3AA-83719-0 WASHER 8.5-18-1.6
86 951603-0800 SNAP PIN d=8
87 309-06972-0 CLAMP 6.5-47.5P
88 921521-0610 SCREW
89 345-06917-1 CLAMP 9-20U
90 9101F4-0825 BOLT
91 930103-0800 NUT
92 398-06972-0 CLAMP 6.5-67P
93 346-01303-1 ENGINE BASEMENT GASKET
DRIVE SHAFT HOUSING (7 parts) DRIVE SHAFT HOUSING
Ref OEM Part # Part Name
1 346Q61192-3 DRIVE SHAFT HOUSING (L)
2 346-67116-0 ENGINE BASEMENT SEAL L=630
3 9101E3-5840 BOLT
4 9106E3-0808 BOLT
5 332-60006-0 GASKET 8.1-15-1
6 345-01111-0 DOWEL PIN 6-12
9 346-66226-0 GROMMET 17-5.5
ELECTRIC PARTS (EP MODEL) (45 parts) ELECTRIC PARTS (EP MODEL)
Ref OEM Part # Part Name
1 346-76010-0 STARTER MOTOR ASSY
2 346-76015-0 * PINION ASSY
3 346-76014-0 * BRUSH HOLDER
4 346-76012-0 * POSITIVE BRUSH
5 346-76013-0 * NEGATIVE BRUSH
6 346-76007-0 DAMPER
7 916103-0835 BOLT
8 930103-0800 NUT
9 941303-0800 SPRING WASHER
10 346-76040-0 STARTER SOLENOID
11 910103-0616 BOLT
14 346-76043-2 STARTER SOLENOID BRACKET
16 910903-6508 BOLT
17 346-76081-1 NEUTRAL SWITCH BRACKET
18 910903-6616 BOLT
19 309-06972-0 CLAMP 6.5-47.5P
20 3G2-76060-0 RECTIFIER COMPLETE
21 3G2-76142-0 GROUND CABLE
22 921503-0525 SCREW
23 941303-0500 SPRING WASHER
24 930103-0500 NUT
25 3B2-76062-0 FUSE WIRE ASSY L=355
26 346-76212-0 * FUSE 15A
27 3B2-76120-1 BATTERY CABLE L=2000
29 3B2-76147-2 STARTER CABLE L=200
30 3A3-76145-0 TERMINAL CAP 8-13-28
31 3B7-76145-0 TERMINAL CAP 8-13-30
32 334-76141-1 STARTER CABLE L=150
33 336-76091-0 LEAD WIRE BAND 100
34 361-76149-0 SPIRAL TUBE PROTECTOR L=130-140
35 353-06281-0 CABLE TERMINAL HOLDER
36 910103-0620 BOLT
37 941303-0600 SPRING WASHER
38 930103-0600 NUT
39 353-06283-0 COLLAR 6.4-10-4.7
40 361-76050-0 CHOKE SOLENOID
41 361-76073-0 * PLUNGER
42 921503-6408 SCREW
43 346-76057-0 CHOKE SOLENOID HOOK
44 951403-0312 SPRING PIN 3-12
45 345-76072-1 ROD
46 930403-0400 NYLON NUT 4-P0.7
47 336-06973-0 CLAMP 6-9.5L
48 921503-0612 SCREW
49 345-76023-0 GROMMET 22-2.5
ELECTRIC PARTS (F TYPE) (6 parts) ELECTRIC PARTS (F TYPE)
Ref OEM Part # Part Name
1 3NV-76080-0 NEUTRAL SWITCH
2 3A1-76082-0 NEUTRAL SWITCH OPERATING LEVER
3 3M4-76084-0 SPACER 12-14-2.2
4 3B7-63731-0 WASHER 12.5-24-1
5 361-76026-0 MAIN SWITCH ASSY
6 346-76039-1 SWITCH PROTECTOR (FOOLPROOF)
FUEL TANK (17 parts) FUEL TANK
Ref OEM Part # Part Name
1 3B7-70200-5 PRIMER BULB ASSY
2 3C7-70220-1 * JOINT ASSY (INLET)
3 3C7-70224-1 * JOINT ASSY (OUTLET)
4 3C7-70211-1 * PRIMER BULB
5 3C7-70217-0 * CLAMP
6 98AB-70-700 * HOSE
7 98AB-701600 * HOSE
8 3B7-70280-1 * FUEL CONNECTOR MARK
9 3GF-70281-0 * FUEL CONNECTOR
10 3GF-70250-1 * FUEL CONNECTOR
11 332-70201-0 * CLAMP
12 3C7-70177-1 FUEL TANK ASSY 25L
13 3C7-70050-1 * FUEL GAUGE VENT CAP ASSY (25L)
14 3C7-70155-0 * PICK-UP ELBOW ASSY (25L)
15 3E0-70270-0 * QUICK-CONNECTOR (MALE)
16 3C7-70199-0 * O-RING
17 3C7-70113-0 * FILTER
GEAR CASE (DRIVE SHAFT) (49 parts) GEAR CASE (DRIVE SHAFT)
Ref OEM Part # Part Name
1 9161E3-0845 BOLT
2 3P0-66233-0 WASHER 8.1-16-1.5
3 3AEQ60000-2 GEAR CASE ASSY
4 3AE-60211-0 * ROLLER BEARING 20-27-30
5 346-64084-0 SHIM 35-41.9-0.5
6 332-60005-2 PLUG 8-8
7 332-60006-0 GASKET 8.1-15-1
8 3C8-60217-1 TRIM TAB
9 910103-5620 BOLT
10 346-64020-1 BEVEL GEAR B
11 346-64027-1 NUT
12 346-64327-0 DRIVE SHAFT SPRING
13 346-64328-0 DRIVE SHAFT SPRING GUIDE
14 346-64302-5 DRIVE SHAFT (L)
15 346-60213-0 TAPERED ROLLER BEARING 32004
16 369-60206-0 WATER STRAINER
17 9218E3-0620 SCREW
18 345-65021-0 WATER PUMP IMPELLER
19 332-65022-0 KEY 20-4.6-2
20 348-65016-1 PUMP CASE (UPPER)
21 348-65011-0 PUMP CASE LINER
22 3B7-65014-0 WATER PIPE SEAL (LOWER)
23 346-65017-2 PUMP CASE (LOWER)
24 346-65013-0 OIL SEAL 17-30-9
25 348-65029-1 GUIDE PLATE GASKET
26 348-65018-0 PUMP CASE GASKET
27 334-65012-0 DOWEL PIN 4-10
28 336-62415-0 O-RING 3.5-36
29 348-65025-0 WATER PUMP GUIDE PLATE
30 9101E3-5652 BOLT
31 346-66013-1 CAM ROD (L)
32 3C8-66011-0 CLUTCH CAM
33 951407-0312 SPRING PIN 3-12
34 3C8-66031-1 CAM ROD BUSHING
35 332-66021-0 O-RING 2.4-5.8
36 3C8-66032-0 O-RING 3.5-21.7
37 910103-6612 BOLT
38 3C8-66308-0 WASHER 6-16-1.5
40 346-66241-1 SHIFT ROD JOINT
42 346-65110-0 WATER PIPE (L)
43 346-65203-0 LOCK PLATE
44 910103-0610 BOLT
45 346-65206-0 WATER PIPE SEAL (UPPER)
46 346-65204-0 WATER PIPE AUXILIARY MOUNT
47 951403-0312 SPRING PIN 3-12
48 346-60984-0 SUB-WATER INLET HOSE PLUG
49 3A1-60235-0 WATER STRAINER SET
50 930403-0400 * NYLON NUT 4-P0.7
51 9215E3-0430 * SCREW
GEAR CASE (PROPELLER SHAFT) (26 parts) GEAR CASE (PROPELLER SHAFT)
Ref OEM Part # Part Name
1 346-60215-0 TAPERED ROLLER BEARING 30205
2 349Q60100-7 PROPELLER SHAFT HOUSING ASSY
3 346Q60101-8 * PROPELLER SHAFT HOUSING
4 346-60102-0 * ROLLER BEARING 18-25-2.5
5 9601-0-6205 * BALL BEARING 6205
6 332-60103-0 * O-RING 3-62.5
7 3AC-60111-0 * OIL SEAL 18-28-8
8 9101E3-5830 BOLT
9 346-64010-1 BEVEL GEAR ASSY (A)
10 369-64082-1 SHIM 26.5-34.8-0.15
11 346-64030-0 BEVEL GEAR C
12 346-64032-0 WASHER 18-24-1.5
13 346-64211-6 PROPELLER SHAFT
14 332-64221-0 SPRING
15 350-64222-1 SPRING RETAINER
16 346-64215-1 CLUTCH
17 346-64218-0 PIN
18 346-64219-0 SNAP
19 3C8-64223-1 PUSH ROD
20 965002-0803 BALL 3/8
21 3R0B64527-0 PROPELLER ASSY (13")
22 3R0-87326-0 PROPELLER HARDWARE KIT
23 346-64231-5 * THRUST HOLDER
24 346-64124-5 * WASHER 12.5-32-2.5
25 346-64121-5 * PROPELLER NUT
26 951503-0322 * SPLIT PIN 3-22
INTAKE MANIFOLD・FUEL PUMP (37 parts) INTAKE MANIFOLD・FUEL PUMP
Ref OEM Part # Part Name
1 346B02010-3 INTAKE MANIFOLD ASSY
2 3KM-02332-0 * STUD BOLT
3 910121-6625 BOLT
4 346-02100-2 REED VALVE ASSY
5 921521-7616 SCREW
6 930103-0600 NUT
7 941303-0600 SPRING WASHER
8 346-02011-1 CARBURETOR GASKET
9 3P1-03536-0 RESTRICTOR
10 356-04000-1 FUEL PUMP ASSY
11 334-04004-0 * PUMP COVER
12 9225F2-6528 * SCREW
13 334-04005-0 * PUMP DIAPHRAGM
14 334-04007-0 * DIAPHRAGM GASKET
15 356-04030-0 * DIAPHRAGM GASKET SET
16 356-04044-0 * CHECK VALVE
17 921722-0306 * SCREW
18 930222-0300 * NUT
19 346-04901-2 GASKET
20 921503-6640 SCREW
21 3AD-02230-0 FUEL FILTER ASSY
22 3AD-02237-0 * CUP
23 3AD-02235-0 * O-RING
24 3AD-02234-0 * FILTER
25 930103-0800 NUT
26 334-66233-0 WASHER 8.1-16-1.5
27 98AB-50-160 HOSE
28 98AB-50-230 HOSE
30 346-02411-1 INTAKE SILENCER
31 910103-5614 BOLT
32 346-67191-1 CHOKE ROD
33 346-67196-1 ROD SNAP 3-B
34 3B2-70260-1 FUEL CONNECTOR (MALE)
35 332-70261-0 NUT 10-P1.25
36 336-70112-0 GASKET 10.2-16-0.5
37 98AB-50-110 HOSE
38 338-02215-0 CLIP φ10
JET DRIVE (40 parts) JET DRIVE
Ref OEM Part # Part Name
1 3FG-04308-0 VOLUTE HOUSING ADAPTER
2 9101E3-0830 BOLT
3 9161E3-0840 BOLT
4 9402E3-0800 WASHER
5 348-65016-1 PUMP CASE (UPPER)
6 348-65011-0 PUMP CASE LINER
7 3B7-65014-0 WATER PIPE SEAL (LOWER)
8 345-65021-0 WATER PUMP IMPELLER
9 332-65022-0 KEY 20-4.6-2
10 348-65018-0 PUMP CASE GASKET
11 3FG-65025-0 WATER PUMP GUIDE PLATE
12 3EF-65029-0 GUIDE PLATE GASKET
13 334-65012-0 DOWEL PIN 4-10
14 3EF-65017-0 PUMP CASE (LOWER)
15 9101E3-0670 BOLT
16 9401E3-0600 WASHER
17 9101E3-0850 BOLT
18 3EF-60001-0 BOLT 10-35
19 9401E3-1000 WASHER
20 3EF-65304-0 HOSE ASSY
22 940103-0600 WASHER
23 3EF-65306-0 SHIFT CAM
24 3FG-65310-0 DRIVE SHAFT W/BEARING HSG ASSY
25 3HT-64236-0 DRIVE SLEEVE
26 3EF-62139-1 NUT
27 921503-6516 SCREW
28 3HT-65022-0 KEY
29 3EF-61309-0 SHIM
30 3EF-10069-0 LOCK WASHER
31 3EF-65315-0 INTAKE HOUSING ASSY
32 3EF-65317-0 * IMPELLER LINER
33 910103-0616 * BOLT
34 941303-0600 * SPRING WASHER
35 3EF-60218-0 * ANODE
36 910103-0625 * BOLT
37 9101E3-5620 BOLT
38 3HT-65313-0 IMPELLER
39 3FG-65321-0 VOLUTE HOUSING ASSY
40 3EF-65322-0 REVERSE GATE ASSY
41 3EF-65323-0 SHIFT LINKAGE SET
MAGNETO (46 parts) MAGNETO
Ref OEM Part # Part Name
1 345-01401-0 MAGNETO BASEMENT
2 126-00121-0 OIL SEAL 30-45-8
3 338-01403-0 O-RING 2-55.5
4 910121-6620 BOLT
5 3P0-06091-1 FLYWHEEL W/GEAR
5a 3KM-06189-0 FLYWHEEL W/RING
6 3P0-06002-1 COIL PLATE ASSY W/ALTERNATOR
8 3P0-06023-0 * ALTERNATOR ASSY
9 921521-6528 * SCREW
10 3G3-06021-1 * EXCITER COIL
11 921521-6525 * SCREW
12 350-06025-0 * HOLDER
13 3G2-06025-1 * HOLDER
14 921521-6406 * SCREW
16 3A3-76037-0 CABLE TERMINAL PLUG
17 353-76037-0 CABLE TERMINAL PLUG
18 346-63722-2 GUIDE PLATE
19 353-63723-1 SETTING RING
20 921521-6510 SCREW
21 346-05228-1 BALL JOINT
22 3P0-06060-0 CD UNIT
23 910103-6620 BOLT
26 3A0-06048-1 IGNITION COIL ASSY W/LABEL
30 346-06999-0 * PLUG CAP W/RESISTANCE
31 3Y9-06157-0 * PROTECTOR L=100
32 3P0-06157-0 * PROTECTOR L=220
33 3C8-72181-0 * CAUTION DECAL (B)
34 910103-5625 BOLT
35 941303-0600 SPRING WASHER
36 930103-0600 NUT
37 3A0-06322-1 PLATE
38 910103-6625 BOLT
39 3C8-66308-0 WASHER 6-16-1.5
40 3T4-06972-1 CLAMP 6.5-87P
41 3B7-06305-0 RUBBER MOUNT 9-16-4.3
42 3A0-76079-0 COLLAR 6.2-9-7.4
43 3F3-06920-0 RUBBER MOUNT 8.5-12-2
44 921503-5510 SCREW
45 3P0-06915-0 CLAMP 6.5-11L
46 336-76091-0 LEAD WIRE BAND 100
47 334-00131-0 KEY 19-7-5
48 931121-1600 NUT
49 334-00133-0 WASHER 17-30-1.6
50 3C7-76142-1 GROUND CABLE L=170
51 910103-0612 BOLT
52 3C7-06921-0 PLUG CAP W/RESISTANCE
OPTIONAL PARTS (2) (3 parts) OPTIONAL PARTS (2)
Ref OEM Part # Part Name
1 3GL-72524-0 HOUR METER ASSY
2 3GL-72529-0 VOLTMETER ASSY
3 3GL-72672-0 SPEEDOMETER KIT (60MPH)
OPTIONAL PARTS (ACCESSORIES) (1) (15 parts) OPTIONAL PARTS (ACCESSORIES) (1)
Ref OEM Part # Part Name
1 3C8-72100-1 TOOL KIT
2 3B7-72201-0 SAFETY ROPE φ5-1600
3 336-60007-0 FLUSHING PLUG
4 3P0-66901-0 REVERSE LOCK SHIFT LEVER KIT
5 345-67169-0 GROMMET 40-13-3
6 346-76160-2 RECTIFIER KIT
7 3B7-72530-2 TACHOMETER ASSY
8 3B7-72659-0 * METER BULB 12V-1.8W
9 3B7-72656-0 * METER DAMPER
10 3B7-72661-0 * FITTING PLATE
11 930103-0500 * NUT
12 941303-0500 * SPRING WASHER
13 361-72539-0 TACHOMETER LEAD WIRE L=6000
14 3P0-72679-0 TACHOMETER UNIT KIT
15 361-72543-0 SEPARATE CORD
PISTON・CRANK SHAFT (24 parts) PISTON・CRANK SHAFT
Ref OEM Part # Part Name
1 3P1-00069-1 CRANKSHAFT SUB-ASSY
2 3P1-00031-0 * CRANKSHAFT A
3 346-00032-0 * CRANKSHAFT B
4 346-00033-0 * CRANKSHAFT C
5 346-00034-0 * CRANKSHAFT D
6 334-00061-1 * CRANK PIN
8 346-00051-1 * LABYRINTH PACKING
9 951407-0308 * SPRING PIN 3-8
10 336-00040-1 * CONNECTING ROD
11 356-00043-0 * ROLLER BEARING 20-28-18
12 3KM-00113-0 MAIN BEARING 5206
13 3J2-00114-0 MAIN BEARING 6305
14 332-00143-0 SHIM t=0.05,0.1,0.2
15 346-00116-0 SPACER 25.2-34-1.6
16 945107-2500 C-RING d=25
17 345-00042-0 ROLLER BEARING 17-21-27
19 346-00115-0 THRUST PLATE
20 346-00122-0 OIL SEAL 24-40-8
21 3MV-87124-0 PISTON RING SET (0.5 O/S)
22 346-00014-0 * PISTON RING (0.5 O/S)
26 3P1-87131-0 PISTON REPAIR KIT (0.5 O/S)
27 346-00004-3 * PISTON (0.5 O/S)
28 3C8-00021-1 * PISTON PIN
29 334-00024-1 * PISTON PIN CLIP
RECOIL STARTER (38 parts) RECOIL STARTER
Ref OEM Part # Part Name
1 346-05000-4 RECOIL STARTER ASSY
2 345-05105-1 * STARTER CASE
3 345-05104-1 * REEL ASSY
4 345-05003-1 * RATCHET
5 345-05135-1 * BUSHING 14.7-15.9-6
6 345-05122-1 * WASHER 6.5-23-1.5
7 945303-0500 * E-RING d=5
8 345-05123-1 * RETURN SPRING
9 345-05124-0 * RETURN SPRING
10 345-05004-1 * STARTER SPRING
11 951403-0316 * SPRING PIN 3-16
12 345-05132-0 * STARTER SHAFT
14 941322-0800 * SPRING WASHER
15 940121-0800 * WASHER
16 930103-0800 * NUT
17 336-05014-0 * ROPE GUIDE
20 338-05019-0 * STARTER HANDLE
21 345-05013-1 * STARTER ROPE φ5-2000
22 338-05131-0 * ROPE ANCHOR
23 350-05136-0 * O-RING 2.5-4.5
24 345-05134-0 * ROPE ANCHOR PLATE
25 346-05116-1 * SEALING PLATE
26 345-05225-1 * STARTER LOCK LEVER SHAFT
27 3KM-67503-0 STARTER SEAL
28 9101F4-0830 BOLT
29 941303-0800 SPRING WASHER
30 3KK-02319-0 BOLT 25mm
31 940103-0600 WASHER
32 345-05901-1 STARTER PULLEY
33 910121-6625 BOLT
34 945303-0600 E-RING d=6
35 345-05226-0 STARTER LOCK LEVER
36 345-05216-0 STARTER LOCK SPRING
37 940103-0400 WASHER
38 3P0-05218-0 STARTER LOCK ROD ASSY
39 346-05209-0 CAP NUT
40 345-06915-0 CLAMP 6.5-14L
41 3C7-72182-2 CAUTION DECAL (C)
REMOTE CONTROL PARTS (32 parts) REMOTE CONTROL PARTS
Ref OEM Part # Part Name
1 3A1-83880-1 REMOTE CONTROL FITTING ASSY
2 3A1-83722-0 * BALL JOINT HOLDER
3 332-83723-0 * HOLDER CAP
4 332-83724-0 * SPRING
5 332-83725-0 * WASHER 5.5-14-1.2
8 345-83820-0 * CABLE CLIP ASSY
9 910403-0518 * BOLT
10 941303-0500 * SPRING WASHER
11 930103-0500 * NUT
12 346-83870-0 * CLUTCH CABLE STAY ASSY
13 910103-0620 * BOLT
14 3A1-83710-1 * CABLE JOINT ASSY
15 346-84830-1 * STEERING HOOK
16 910103-6830 * BOLT
17 930103-0800 * NUT
19 346-83732-0 * GROMMET 68-20-3
20 345-83721-0 * BALL JOINT
21 930103-0600 * NUT
22 941303-0600 * SPRING WASHER
23 346-84905-1 DRAG LINK ASSY
24 910103-0835 * BOLT
25 353-84918-0 * NYLON NUT 3/8-24UNF
26 930403-0800 * NYLON NUT 8-P1.25
27 353-84916-0 * WASHER 9.6-18-2
28 940103-0800 * WASHER
29 3F3-84908-0 * SEAL RING
30 353-84904-0 DRAG LINK SPACER
31 346-84901-0 TURNING BUCKLE PLATE
32 3P0-83857-0 REMOTE CONTROL STOP CORD ASSY L=3900
33 345-76023-0 * GROMMET 22-2.5
34 336-06973-0 CLAMP 6-9.5L
35 921503-0612 SCREW
SHIFT (25 parts) SHIFT
Ref OEM Part # Part Name
1 3FG-64293-0 PLATE
2 9101E3-5616 BOLT
3 3EF-66211-0 SHIFT ROD
4 3EF-76076-0 LINK ROD
5 3EG-76076-0 LINK ROD
6 3EF-61114-0 NUT
7 930103-0600 NUT
8 3EF-66336-0 SPRING
10 3EF-65307-0 SNAP PIN
11 346-66211-1 SHIFT ROD
12 346Q66110-2 SHIFT LEVER
13 3FGQ66110-2 SHIFT LEVER
14 346-66138-0 SPACER 18.2-26-3
15 345-66137-0 OIL SEAL 10-20-4
16 346-66121-0 SHIFT LEVER STOPPER
17 910903-6512 BOLT
18 345-66115-0 SHIFT LEVER STOP HOLDER
19 965002-1605 BALL 5/16
20 332-66112-0 SPRING
21 9101F4-0616 BOLT
22 940103-0600 WASHER
23 346-67101-0 BUSHING 10-12.8-28.5
24 346-66225-1 SHIFT ROD LEVER
25 930403-1000 NYLON NUT 10-P1.5
26 345-66119-0 SHIM t=0.2
TILLER HANDLE (26 parts) TILLER HANDLE
Ref OEM Part # Part Name
1 398Q63003-3 TILLER HANDLE ASSY
2 3M3Q63005-2 * TILLER HANDLE SUB-ASSY
3 3NTQ63011-0 ** TILLER HANDLE
4 398-63012-0 ** GRIP
5 398-63041-0 ** THROTTLE SHAFT
6 345-63048-0 ** THROTTLE SHAFT DAMPER
8 3NT-63046-0 ** BUSHING
9 921803-0525 ** SCREW
10 951403-0310 ** SPRING PIN 3-10
11 3V1-63035-1 ** FRICTION PIECE
12 3V1-63077-0 ** ADJUSTING NUT
13 3V1-63036-0 ** SPRING
14 910103-0625 ** BOLT
15 9101E3-5675 ** BOLT
16 930403-0600 ** NYLON NUT 6-P1.0
17 398-63053-0 ** SPACER
18 369-72019-1 ** THROTTLE DECAL
19 346-63201-3 * BOLT 9.7-11-12-8.5
20 3NT-63207-0 * COLLAR
21 350-63046-0 BUSHING 8.4-10-11
22 346-63064-0 UNIVERSAL PINION
23 951403-0414 SPRING PIN 4-14
24 346-63066-1 COLLAR 15.9-17-9
25 940103-0800 WASHER
26 345-66226-0 GROMMET 17-3
27 345-67117-0 GROMMET 17-2.7
TOP COWL (9 parts) TOP COWL
Ref OEM Part # Part Name
1 3HT-67564-0 JET DRIVE DECAL
2 3C7-72180-3 CAUTION DECAL (A)
3 3KMQ67645-1 TOP COWL ASSY
4 3KMQ67640-0 * TOP COWL SUB-ASSY
5 3KM-67501-0 ** TOP COWL SEAL
6 3KMQ67521-0 ** TILT HANDLE
7 930403-0600 ** NYLON NUT 6-P1.0
8 3C8-66308-0 ** WASHER 6-16-1.5
9 3MV-87801-1 * DECAL SET (M25H)

100-Hour / Annual Service Checklist

Regular maintenance keeps your Tohatsu M25/30H/JET 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. Inspect and clean carburetor(s); check fuel mixture settings
  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. Decarbonize exhaust ports and piston crown if needed
  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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