Tohatsu M40C (2013) Parts & Diagrams

OEM and aftermarket replacement parts for Tohatsu M40C. Scroll down for exploded parts diagrams (22), specifications, and maintenance reference.

Tohatsu M40C (2013) Parts & Diagrams

🔎 Tohatsu M40C Reference Library — Exploded parts diagrams (22 diagrams), specifications, common issues, and maintenance checklist.

The Tohatsu M40C is a 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 40 HP
Displacement 697
Bore x Stroke 68 x 64
Spark Plug (Type & Gap) NGK B8HS-10
Engine Oil Capacity
Recommended Engine Oil TC-W3 Certified 2-Stroke Oil
Gear Case Oil Capacity
Idle Speed (in gear) 750 RPM (in gear)
Full Throttle RPM Range 5150-5850
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 M40C:

  • 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 M40C.

ASSEMBLY・KIT PARTS (11 parts) ASSEMBLY・KIT PARTS
Ref OEM Part # Part Name
1 361Q87302-1 LOWER UNIT ASSY (L)
2 3C1B87090-5 ENGINE SHORT BLOCK KIT
3 922503-6412 * SCREW
4 361-87121-5 POWER HEAD GASKET SET
5 9101E3-5652 * BOLT
6 361-65239-0 * WATER PUMP GUIDE PLATE
7 361-87321-0 LOWER UNIT GASKET SET
8 951403-0312 * SPRING PIN 3-12
9 941303-0800 * SPRING WASHER
10 9101E3-5840 * BOLT
11 951603-0800 * SNAP PIN d=8
BOTTOM COWL (38 parts) BOTTOM COWL
Ref OEM Part # Part Name
1 345Q67100-2 BOTTOM COWL
2 345-67113-0 MOUNT 12-18-2.5
3 345-67114-0 SPACER 8.4-12-17
4 9101E3-6835 BOLT
5 345-67115-0 WASHER 6.5-21-1
6 345-67151-0 CHOKE ROD
7 345-67193-0 GROMMET 16-2.5
8 338Q67141-0 HOOK LEVER
9 338-67147-0 SEAL RING 13.8-22-3.7
10 350-67105-0 HOOK LEVER BUSHING 14-16.5-17.7
11 3C8-67146-0 WASHER 14-22-1
12 941403-1400 WAVE WASHER d=14
13 345-67142-1 COVER HOOK
14 910103-6612 BOLT
15 3C8-66308-0 WASHER 6-16-1.5
16 353-67162-0 GROMMET
17 345-83732-0 GROMMET
18 369-61016-0 GROMMET 29-3
19 345-67161-0 GROMMET 22-3
20 345-67117-0 GROMMET 17-2.7
21 345-67183-0 AIR INTAKE BAFFLE
22 9101F4-0625 BOLT
24 398-06830-0 STOP SWITCH ASSY
25 353-06821-0 * STOP SWITCH LANYARD ASSY
26 336-06973-0 CLAMP 6-9.5L
27 921503-5612 SCREW
28 345-76081-0 NEUTRAL SWITCH BRACKET
29 910903-6616 BOLT
30 910103-0612 BOLT
31 345-66226-0 GROMMET 17-3
32 348-63061-0 THROTTLE SHAFT
33 345-63063-0 THROTTLE SHAFT SUPPORT
34 9101F4-0630 BOLT
35 940103-0600 WASHER
36 3B2-70260-1 FUEL CONNECTOR (MALE)
37 332-70261-0 NUT 10-P1.25
38 336-70112-0 GASKET 10.2-16-0.5
39 361-72026-0 SPARK PLUG DECAL (BR7HS10)
BRACKET (76 parts) BRACKET
Ref OEM Part # Part Name
1 9101E3-5610 BOLT
2 3AEQ62112-2 CLAMP BRACKET (R)
3 338-60218-2 ANODE
4 910103-5620 BOLT
5 3AEQ62113-2 CLAMP BRACKET (L)
6 346-62117-1 DISTANCE PIECE
7 930103-0600 NUT
9 9401E3-0600 WASHER
10 3AC-62191-0 SWIVEL BRACKET SHAFT ASSY
11 346-62124-1 NYLON NUT 7/8-14
12 346-62127-0 CAP NUT
13 345-62121-1 THRUST ROD
14 345-62122-2 THRUST ROD SPRING
15 349Q62310-3 SWIVEL BRACKET
17 349-62126-0 BUSHING
18 346-62424-1 THRUST PLATE (LOWER) 26.5-46-1
19 3H8-62415-0 O-RING 3.5-25.7
20 348Q61411-2 MOUNT BRACKET
21 344-67177-1 GREASE FITTING
22 945103-2500 C-RING d=25
23 398-62396-1 GROUND L=130
24 9101E3-5612 BOLT
25 346-66322-0 REVERSE LOCK
26 349-66313-0 REVERSE LOCK ARM
27 336-66319-1 PIVOT BOLT
29 346-66321-0 REVERSE LOCK ROD
30 951503-0212 SPLIT PIN 2-12
31 3P0-66311-0 REVERSE LOCK LEVER
32 3AL-66333-0 REVERSE LOCK LEVER GRIP
33 346-66334-0 STOPPER
34 3AL-05254-0 SHOULDER BOLT 6-8
36 3AL-05212-0 BUSHING 8.1-20
37 3AA-83719-0 WASHER 8.5-18-1.6
38 3R0-66308-0 WASHER 6-16-1.5
39 349-66312-0 REVERSE LOCK LINK
40 346-66323-1 REVERSE LOCK LEVER SPRING
41 3R0-66332-0 REVERSE LOCK SPRING (L)
42 345-62441-0 FRICTION PIECE
43 9101E3-0830 BOLT
44 346-62421-1 FRICTION SPRING
45 348Q62010-1 STEERING SHAFT ASSY
46 345-62417-0 BUSHING 26-32
47 3A0-62423-2 THRUST PLATE (UPPER) 27-50-1
48 345-61301-1 RUBBER MOUNT (UPPER)
49 345-61313-0 STUD
50 930403-1000 NYLON NUT 10-P1.5
51 345-61302-1 RUBBER MOUNT (LOWER)
53 345-61321-2 BOLT
54 345-61334-0 WASHER 21-40.3-4
55 345-61331-0 DAMPER CAP
56 345-61332-0 COLLAR 20-31.7-3
57 345-61333-0 DAMPER (UPPER)
58 348-61309-0 SHIM 33-40.7-0.5
59 945003-4000 C-RING d=40
60 9401E3-1000 WASHER
61 346-61323-0 LOCK PLATE
62 345-61322-2 WASHER
63 930103-1000 NUT 10-P1.5
65 3A3-62396-1 GROUND L=110
66 349Q62993-2 TILT STOPPER
67 346-62437-0 BUSHING 10.2-12-29.5
68 346-62439-1 SETTING PLATE
69 346-62438-0 SETTING PIECE
70 951403-0640 SPRING PIN
71 3C8-62421-1 FRICTION SPRING
72 9101E3-5820 BOLT
73 916103-0885 BOLT
74 940103-0800 WASHER
75 930103-0800 NUT
76 3AAQ62105-0 CLAMP SCREW KIT
77 3AAQ62108-0 * CLAMP SCREW ASSY
78 3AA-62106-0 ** CLAMP SCREW
79 332Q62102-1 ** CLAMP SCREW HANDLE
80 3C8-62104-2 ** RIVET 3-22
81 332-62101-1 * CLAMP SCREW PAD
82 3C8-62107-0 * SHOULDER BOLT
CARBURETOR (27 parts) CARBURETOR
Ref OEM Part # Part Name
1 345-03200-0 CARBURETOR ASSY
2 336-03221-0 * FLOAT CHAMBER
3 345-03292-0 * DRAIN SCREW
4 336-03293-0 * O-RING
5 336-03222-0 * FLOAT CHAMBER O-RING 1.9-64
6 922503-6412 * SCREW
7 334-03231-1 * FLOAT
8 334-03232-0 * FLOAT ARM PIN
9 345-03240-0 * FLOAT VALVE
10 3B7-03240-0 * FLOAT VALVE
11 345-03243-0 * O-RING 1.3-5.7
12 344-03244-0 * CLIP
13 334-03241-0 * CLIP PLATE
14 921521-0406 * SCREW
15 334-03242-0 * VALVE PIN
16 345-03252-0 * MAIN NOZZLE
17 345-03251-1 * MAIN JET (#220)
18 345-03254-0 * SLOW JET (#110)
19 345-03253-0 * MAIN AIR JET (#120)
20 345-03255-0 * PILOT AIR JET (#120)
21 345-03261-0 * PLUG SCREW
22 346-03265-0 * STOP SCREW
23 346-03267-0 * SPRING
24 345-03266-0 * PILOT SCREW
25 346-03268-0 * SPRING
26 345-03263-0 * PLUG SCREW
27 345-03262-0 * PLUG SCREW WASHER
COMPONENT PARTS OF REMOTE CONTROL (48 parts) COMPONENT PARTS OF REMOTE CONTROL
Ref OEM Part # Part Name
1 3B7Q84350-3 REMOTE CONTROL HEAD ASSY (RC5C)
2 3A3-76037-0 * CABLE TERMINAL PLUG
3 3A3-84432-0 * BUSHING
4 3A3-84375-0 * SCREW
5 3A3-84374-0 * SPACER
6 353-84371-0 * WASHER
7 930103-0600 * NUT
8 3A3-84383-0 * WASHER
9 3A3-84421-0 * ROLLER
10 3A3-84422-0 * THRUST PLATE
11 3A3-84431-0 * BUSHING
12 940103-0800 * WASHER
13 3A3-84442-0 * BOLT
14 353-84388-0 * DETENT ROLLER
15 3B7Q84312-0 * FREE THROTTLE LEVER
16 921503-0406 * SCREW
17 3A3-84423-0 * DETENT RETAINER
18 921603-0518 * SCREW
19 3A3-84307-0 * DETENT SPRING
20 921603-0512 * SCREW
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 945303-0600 * E-RING d=6
26 3A3-84381-0 * SHIFT GEAR ASSY
27 3A3-83314-2 * CABLE TERMINAL
28 3A3-84364-2 * DRIVE GEAR
29 3A3-84429-0 * WIRE COVER
30 930103-0500 * NUT
31 910103-0525 * BOLT
32 3A3-84376-0 * GROMMET
33 3B7Q84441-0 * REAR HOUSING
34 3B7Q84366-0 * REAR PANEL
35 3A3-84401-0 * NEUTRAL LOCK ARM
36 3A3-84403-0 * NEUTRAL LOCK SPRING
37 3A3-84407-0 * WASHER
38 921503-0510 * SCREW
39 3A3-84451-0 * TILT SWITCH COVER
40 3A3-84404-0 * GRIP
41 3B7Q84343-0 * CONTROL LEVER
42 3A3-84452-0 * TILT SWITCH PLUG
43 3A3-84368-0 * WAVE WASHER
44 3A3-84391-0 * FREE THROTTLE DRUM
45 3A3-84435-0 * BUSHING
46 3A3-84406-0 * PLATE
47 361-84414-0 * GROMMET
48 361-84415-0 * GROMMET
COMPONENT PARTS OF REMOTE CONTROL (ELECTRIC PARTS) (12 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 921503-0315 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
CYLINDER・CRANK CASE (65 parts) CYLINDER・CRANK CASE
Ref OEM Part # Part Name
1 361B01100-2 CYL BLOCK & CRANKCASE ASSY
2 393-01137-0 * NIPPLE
3 393-01131-0 * NIPPLE 5.5-5
4 345-00117-0 * DOWEL PIN
5 345-01150-1 * CHECK VALVE ASSY
6 916129-0850 * BOLT
7 916124-0840 * BOLT
8 9161F4-0835 * BOLT
10 345-01111-0 * DOWEL PIN 6-12
11 361B01001-1 CYLINDER HEAD ASSY
12 350-01093-0 * WELCH PLUG
13 345-01005-1 CYLINDER HEAD GASKET
14 9161F9-0845 BOLT
16 9701-1-1015 SPARK PLUG (BR7HS10)
17 345-01030-0 THERMOSTAT
18 3H6B01031-0 THERMOSTAT CAP
19 346-01032-0 THERMOSTAT CAP GASKET
20 9101F4-5630 BOLT
21 338-60218-2 ANODE
22 910103-0616 BOLT
23 345B02301-2 EXHAUST COVER (OUTER)
24 345-02305-1 EXHAUST COVER GASKET
25 9101F4-5620 BOLT
26 98AL-40-230 HOSE
27 393-01160-0 CHECK VALVE
28 3T5-01133-0 CLIPφ8
29 338-01133-0 CLIPφ7
30 336-06973-0 CLAMP 6-9.5L
31 910103-6612 BOLT
32 345B05101-0 BRACKET
34 940121-0800 WASHER
35 930121-0800 NUT
36 921503-0520 SCREW
38 309-06972-0 CLAMP 6.5-47.5P
39 345-01303-1 ENGINE BASEMENT GASKET
40 361-05211-0 STARTER LOCK ARM
41 345-05213-0 THROTTLE LIMITER ARM
43 345-05221-1 THROTTLE LIMITER ROD
44 345-05222-1 STARTER LOCK ROD
47 353-83728-1 PIN
50 941303-0600 SPRING WASHER
52 915324-0825 STUD
53 940103-0800 WASHER
54 345-01015-0 WASHER 8.5-19.5-3.2
57 9101F4-0620 BOLT
58 940103-0600 WASHER
59 941403-1000 WAVE WASHER d=10
60 346-63721-0 BUSHING 6.2-16-5
61 345-05224-0 ROD SNAP 5-2.5
63 3B7-05243-0 BALL JOINT CONNECTOR
64 348-63716-1 THROTTLE ROD
68 348-63711-1 ADVANCER ARM
69 910121-0840 BOLT
70 345-63713-0 BUSHING 8-14-4
71 334-66233-0 WASHER 8.1-16-1.5
72 930403-0800 NYLON NUT 8-P1.25
73 345-05223-1 ROD SNAP 3.5-2
74 348-63715-1 ROD 5-75L
75 346-05234-0 ROD JOINTφ5
76 3B7-63733-0 ROD SNAP 5-2.5
77 930103-0500 NUT
78 361-83728-0 PIN
79 3AA-83719-0 WASHER 8.5-18-1.6
80 951603-0800 SNAP PIN d=8
81 930103-0600 NUT
DRIVE SHAFT HOUSING (20 parts) DRIVE SHAFT HOUSING
Ref OEM Part # Part Name
1 361Q61030-1 DRIVE SHAFT HOUSING (L)
3 345-61012-1 DRIVE SHAFT HOUSING GASKET
4 9161E3-0885 BOLT
5 3P0-66233-0 WASHER 8.1-16-1.5
6 9101E3-5620 BOLT
7 345-61111-1 STUD
8 930103-0800 NUT
9 345Q01301-0 ENGINE BASEMENT
10 345-67116-0 ENGINE BASEMENT SEAL L=400
11 345-01111-0 DOWEL PIN 6-12
12 345-01215-0 OIL SEAL 17-30-8
13 910203-0640 BOLT
14 941303-0600 SPRING WASHER
15 9106E3-0808 BOLT
16 332-60006-0 GASKET 8.1-15-1
17 361-02311-1 EXHAUST PIPE
18 345-02312-1 EXHAUST PIPE GASKET
19 9101E3-5625 BOLT
20 345-61312-1 RUBBER MOUNT RETAINER
21 9101E3-5820 BOLT
ELECTRIC PARTS (47 parts) ELECTRIC PARTS
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
6 336-76091-0 LEAD WIRE BAND 100
7 910103-0830 BOLT
8 345-06971-0 CLAMP 9-12U
9 930103-0800 NUT
10 941303-0800 SPRING WASHER
11 346-76040-0 STARTER SOLENOID
15 361-76055-1 CHOKE SOLENOID BRACKET
16 910103-0618 BOLT
19 3B2-76147-2 STARTER CABLE L=200
20 3A3-76145-0 TERMINAL CAP
21 334-76141-1 STARTER CABLE L=150
22 361-76050-0 CHOKE SOLENOID
23 361-76073-0 * PLUNGER
24 910103-0645 BOLT
26 128-02605-1 SPACER 6-8-28.5
28 3G2-76060-0 RECTIFIER COMPLETE
29 3G2-76142-0 GROUND CABLE
30 921503-0525 SCREW
31 930103-0500 NUT
32 941303-0500 SPRING WASHER
33 353-06281-0 CABLE TERMINAL HOLDER
34 910103-0620 BOLT
35 309-06972-0 CLAMP 6.5-47.5P
36 353-06283-0 COLLAR 6.4-10-4.7
37 941303-0600 SPRING WASHER
38 930103-0600 NUT
39 921503-6408 SCREW
40 346-76057-0 CHOKE SOLENOID HOOK
41 951403-0312 SPRING PIN 3-12
42 345-76072-1 ROD
43 930403-0400 NYLON NUT 4-P0.7
44 3B2-76062-0 FUSE WIRE ASSY L=355
45 346-76212-0 * FUSE 15A
46 3B2-76120-1 BATTERY CABLE L=2000
47 3B7-76145-0 TERMINAL CAP
48 361-76026-0 MAIN SWITCH ASSY
49 346-76039-1 SWITCH PROTECTOR
50 361-76080-0 NEUTRAL SWITCH
51 361-76082-0 NEUTRAL SWITCH OPERATING LEVER
52 398-76083-0 NEUTRAL SWITCH ACTUATOR
53 3M4-76084-0 SPACER 12-14-2.2
54 3B7-63731-0 WASHER 12.5-24-1
FUEL TANK (17 parts) FUEL TANK
Ref OEM Part # Part Name
1 3B7-70200-4 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-70250-0 * 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) (40 parts) GEAR CASE (DRIVE SHAFT)
Ref OEM Part # Part Name
1 361Q60000-0 GEAR CASE ASSY
2 345-60211-0 * ROLLER BEARING 22-30-30
3 332-60005-2 PLUG 8-8
4 332-60006-0 GASKET 8.1-15-1
5 345-64020-1 BEVEL GEAR B
6 345-64025-0 BOLT
7 345-64084-0 SHIM 41-51.5-0.5
8 345-64302-0 DRIVE SHAFT (L)
9 345-60213-0 TAPERED ROLLER BEARING 32304
10 345-60206-1 WATER STRAINER
11 921503-0440 SCREW
12 930403-0400 NYLON NUT 4-P0.7
13 345-65021-0 WATER PUMP IMPELLER
14 332-65022-0 KEY
15 348-65016-1 PUMP CASE (UPPER)
16 348-65011-0 PUMP CASE LINER
17 3B7-65014-0 WATER PIPE SEAL (LOWER)
18 348-65017-1 PUMP CASE (LOWER)
19 332-60111-0 OIL SEAL 17-33-9.5
20 345-65015-0 O-RING 3.2-47
21 348-65018-0 PUMP CASE GASKET
22 334-65012-0 DOWEL PIN 4-10
23 348-65025-0 WATER PUMP GUIDE PLATE
24 348-65029-1 GUIDE PLATE GASKET
25 9101E3-5652 BOLT
26 348-66013-0 CAM ROD (L)
27 951403-0316 SPRING PIN 3-16
28 345-66031-1 CAM ROD BUSHING
29 345-66021-0 O-RING 1.9-6.8
30 332-66032-0 O-RING 2.4-15.4
31 348-66011-0 CLUTCH CAM
32 345-66241-0 SHIFT ROD JOINT
33 951403-0312 SPRING PIN 3-12
34 9101E3-5840 BOLT
35 301-66024-1 STOPPER
36 301-66025-0 GASKET 6.2-11-1
37 345-65110-1 WATER PIPE (L)
38 345-65206-0 WATER PIPE SEAL (UPPER)
39 345-65205-0 COLLAR 18-20-4.5
40 346-65204-0 WATER PIPE AUXILIARY MOUNT
GEAR CASE (PROPELLER SHAFT) (29 parts) GEAR CASE (PROPELLER SHAFT)
Ref OEM Part # Part Name
1 345-60215-0 TAPERED ROLLER BEARING 32007
2 348-60217-0 TRIM TAB
3 353-60219-0 TRIM TAB GASKET
4 910103-5618 BOLT
5 345Q60100-0 PROPELLER SHAFT HOUSING ASSY
6 345Q60101-1 * PROPELLER SHAFT HOUSING
7 9601-0-6007 * BALL BEARING 6007
8 345-60211-0 * ROLLER BEARING 22-30-30
9 334-60223-0 * OIL SEAL 22-36-10
10 345-60103-0 * O-RING 3.5-69.4
11 9101E3-5830 BOLT
12 348-64010-1 BEVEL GEAR ASSY (A)
13 348-64030-0 BEVEL GEAR C
14 353-64038-0 SHIM 36-44-0.1
15 345-64032-0 WASHER 22.1-28-3
16 348-64211-0 PROPELLER SHAFT
17 348-64215-0 CLUTCH
18 345-64217-0 PIN
19 345-64219-0 SNAP
20 345-64221-0 SPRING
21 345-64222-0 SPRING RETAINER
22 345-64223-0 PUSH ROD
23 3T5B64529-0 PROPELLER ASSY (14")
24 361-87326-0 PROPELLER HARDWARE KIT
25 3C8-64231-0 * THRUST HOLDER
26 348-64232-0 * STOPPER
27 345-64124-0 * WASHER 17-32-3
28 345-64121-0 * PROPELLER NUT
29 951503-0325 * SPLIT PIN 3-25
INTAKE MANIFOLD・FUEL PUMP (52 parts) INTAKE MANIFOLD・FUEL PUMP
Ref OEM Part # Part Name
1 915321-0655 STUD
2 345B02010-0 INTAKE MANIFOLD
3 345-02104-0 INTAKE MANIFOLD GASKET
4 345-02105-0 INTAKE MANIFOLD GASKET
5 345-02100-1 REED VALVE ASSY
6 921521-7412 SCREW
7 345-02106-0 PLATE
8 910121-7620 BOLT
9 345-02103-0 REED VALVE SEAT GASKET
10 9101F4-5630 BOLT
11 915321-0620 STUD
12 930103-0600 NUT
13 941303-0600 SPRING WASHER
14 348-63718-0 THROTTLE CAM
15 921503-0616 SCREW
16 346-63721-0 BUSHING 6.2-16-5
17 3C8-66308-0 WASHER 6-16-1.5
18 941403-1000 WAVE WASHER d=10
19 345-02011-3 CARBURETOR GASKET
20 345-67191-1 CHOKE ROD
21 345-67192-0 CHOKE ROD
22 345-67194-0 CHOKE ROD CONNECTER
23 921503-0408 SCREW
24 356-04000-1 FUEL PUMP ASSY
25 334-04004-0 * PUMP COVER
26 9225F2-6528 * SCREW
27 334-04005-0 * PUMP DIAPHRAGM
28 334-04007-0 * DIAPHRAGM GASKET
29 356-04030-0 * DIAPHRAGM GASKET SET
30 356-04044-0 * CHECK VALVE
31 921722-0306 * SCREW
32 930222-0300 * NUT
33 346-04901-2 GASKET
34 921503-6640 SCREW
35 98AB-50-160 HOSE
36 98AB-50-270 HOSE
37 98AB-50-210 HOSE
38 338-02215-0 CLIPφ10
39 346-02230-0 FUEL FILTER ASSY
40 346-02237-0 * CUP
41 346-02235-0 * GASKET
42 346-02234-0 * FILTER
43 930103-0800 NUT
44 940103-0800 WASHER
45 348-02231-0 PLATE
46 345-02411-0 INTAKE SILENCER
47 345-02415-0 INTAKE SILENCER COVER
48 9101F4-0616 BOLT
49 345-02416-0 INTAKE SILENCER PLATE
50 921503-5508 SCREW
51 345-02417-1 INTAKE SILENCER LOCK PLATE
52 345-67195-1 BUSHING
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
5 361-06091-0 FLYWHEEL W/GEAR
6 3A0-06002-0 COIL PLATE ASSY W/ALTERNATOR
7 3G2-06022-0 * PULSAR COIL
8 3A0-06023-0 * ALTERNATOR ASSY
9 921521-6528 * SCREW
10 3G2-06021-1 * EXCITER COIL
11 921521-6522 * SCREW
12 350-06025-0 * HOLDER
13 921521-6406 * SCREW
14 921521-6408 * SCREW
15 921521-6510 SCREW
16 921503-0530 SCREW
17 930103-0500 NUT
18 334-00131-0 KEY
19 931121-1600 NUT
20 345-00133-0 WASHER 16-28-3.2
21 353-76037-0 CABLE TERMINAL PLUG
22 346-63722-2 GUIDE PLATE
23 348-05233-0 COIL PLATE STOPPER
24 346-05228-1 BALL JOINT
25 353-63723-1 SETTING RING
28 3C1-06048-0 IGNITION COIL ASSY W/LABEL
29 346-06999-0 * PLUG CAP W/RESISTANCE
30 3C8-72181-0 * CAUTION DECAL (B)
31 361-06060-1 CD UNIT
32 910103-0625 BOLT
36 309-06972-0 CLAMP 6.5-47.5P
37 336-76091-0 LEAD WIRE BAND 100
38 910103-5620 BOLT
39 941303-0600 SPRING WASHER
40 930103-0600 NUT
41 3A0-06322-1 PLATE
42 910103-6625 BOLT
43 3C8-66308-0 WASHER 6-16-1.5
44 3B7-06305-0 RUBBER MOUNT 9-16-4.3
45 3A0-76079-0 COLLAR 6.2-9-7.4
46 3F3-06920-0 RUBBER MOUNT 8.5-12-2
47 3B7-76142-1 GROUND CABLE L=120
48 922521-6510 SCREW
49 3C7-76142-1 GROUND CABLE L=170
50 3A3-76037-0 CABLE TERMINAL PLUG
51 3C7-06921-0 PLUG CAP W/RESISTANCE
OPTIONAL PARTS・ACCESSORIES (1) (26 parts) OPTIONAL PARTS・ACCESSORIES (1)
Ref OEM Part # Part Name
1 3B7-72530-2 TACHOMETER ASSY
5 930103-0500 * NUT
7 3E0-72644-0 SPEEDOMETER KIT (75MPH)
8 3E0-72649-0 * SPEEDOMETER ASSY (75MPH)
9 3B7-72659-0 ** METER BULB 12V-1.8W
10 3B7-72656-0 ** METER DAMPER
11 3B7-72661-0 ** FITTING PLATE
12 930203-0500 ** NUT
13 941303-0500 ** SPRING WASHER
14 3B7-72650-0 ** SPEEDOMETER TUBE L=6000
15 3B7-72651-0 ** SPEEDOMETER BAND
16 3B7-72643-0 * SPEEDOMETER SENSOR
17 3E0-72529-0 VOLTMETER ASSY
20 3B7-72662-0 * FITTING PLATE
23 3E0-72524-0 HOUR METER ASSY
24 3B7-72657-0 * METER BULB 12V-1.7W
25 3B7-72655-0 * METER DAMPER
26 3B7-72664-0 * FITTING PLATE
27 930203-0400 * NUT
28 941303-0400 * SPRING WASHER
29 361-72539-0 TACHOMETER LEAD WIRE L=6000
30 345-67169-0 GROMMET
31 361-72543-0 SEPARATE CORD
32 353-72537-0 METER LEAD WIRE L=1500
33 353-72548-0 ASSIST CORD (BLK) L=200
34 353-72521-1 METER LAMP SWITCH
OPTIONAL PARTS・ACCESSORIES (2) (9 parts) OPTIONAL PARTS・ACCESSORIES (2)
Ref OEM Part # Part Name
1 3C8-72100-1 TOOL KIT
2 3B7-72201-0 SAFETY ROPE φ6-1600
3 346-76160-2 RECTIFIER KIT
4 361-84901-0 TURNING BUCKLE PLATE
5 353-84904-0 DRAG LINK SPACER
6 3A3-81301-0 TWIN REMOTE CONTROL KIT
7 336-60007-0 FLUSHING PLUG
8 369-76167-0 EXTENSION CORD (LIGHT) L=2000
9 345-67169-0 GROMMET
PISTON・CRANK SHAFT (28 parts) PISTON・CRANK SHAFT
Ref OEM Part # Part Name
1 345-00122-0 OIL SEAL 25-55-10
2 345-00125-0 RETAINER 50-60-1.6
3 361-00069-1 CRANKSHAFT SUB-ASSY
4 361-00031-0 * CRANKSHAFT A
5 348-00032-0 * CRANKSHAFT B
6 348-00033-0 * CRANKSHAFT C
7 348-00034-0 * CRANKSHAFT D
8 348-00061-1 * CRANK PIN
9 345-00040-1 * CONNECTING ROD
10 345-00043-0 * ROLLER BEARING 25-32-20
11 345-00045-0 * BIG END BEARING WASHER
13 345-00051-0 * LABYRINTH PACKING
14 345-00053-0 * O-RING 2-49.5
15 951407-0306 * SPRING PIN 3-6
16 345-00113-0 MAIN BEARING 5206
17 345-00115-0 RETAINER 56-66-1.6
18 945107-3000 C-RING d=30
19 345-00116-0 SPACER 30.2-40-2.3
20 345-00141-0 SHIM 31-42
21 345-00114-0 MAIN BEARING 355520
22 345-00042-0 ROLLER BEARING 17-21-27
23 3C1-87131-0 PISTON REPAIR KIT (0.5 O/S)
24 361-00004-1 * PISTON (0.5 O/S)
25 345-00021-1 * PISTON PIN
26 334-00024-1 * PISTON PIN CLIP
27 3C1-87124-0 PISTON RING SET (0.5 O/S)
28 361-00014-0 * PISTON RING (0.5 O/S)
29 345-00014-0 * PISTON RING (0.5 O/S)
RECOIL STARTER (36 parts) RECOIL STARTER
Ref OEM Part # Part Name
1 361-05000-1 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 ROPEφ5-2000
22 338-05131-0 * ROPE ANCHOR
23 350-05136-0 * O-RING 2.5-4.5
24 345-05134-0 * ROPE ANCHOR PLATE
25 344-05116-0 * SEALING PLATE
26 345-05225-1 * STARTER LOCK LEVER SHAFT
27 9101F4-0830 BOLT
28 941303-0800 SPRING WASHER
29 9101F4-0625 BOLT
30 941303-0600 SPRING WASHER
31 345-05901-1 STARTER PULLEY
32 910121-6625 BOLT
33 346-05209-0 CAP NUT
34 345-05217-1 STARTER LOCK ROD
35 940103-0400 WASHER
36 345-05216-0 STARTER LOCK SPRING
37 945303-0600 E-RING d=6
38 345-05226-0 STARTER LOCK LEVER
39 3C7-72182-2 CAUTION DECAL (C)
REMOTE CONTROL PARTS (25 parts) REMOTE CONTROL PARTS
Ref OEM Part # Part Name
1 361-83880-3 REMOTE CONTROL FITTING ASSY
2 345-83721-0 * BALL JOINT
3 3A1-83722-0 * BALL JOINT HOLDER
4 332-83723-0 * HOLDER CAP
5 332-83724-0 * SPRING
6 332-83725-0 * WASHER 5.5-14-1.2
7 930103-0600 * NUT
8 941303-0600 * SPRING WASHER
9 345-83820-0 * CABLE CLIP ASSY
10 910403-0518 * BOLT
11 941303-0500 * SPRING WASHER
12 345-83821-0 * CLUTCH CABLE CLIP BRACKET
13 910103-6616 * BOLT
14 345-84830-0 * STEERING HOOK
15 910103-6820 * BOLT
16 336-06973-0 * CLAMP 6-9.5L
17 9215E3-0612 * SCREW
18 361-84905-1 DRAG LINK ASSY
19 361-84914-1 * SPACER
20 353-84917-0 * BOLT 3/8-45
21 353-84918-0 * NYLON NUT 3/8-24UNF
22 353-84916-0 * WASHER 9.6-18-2
23 3F3-84908-0 * SEAL RING
24 3P0-83857-0 REMOTE CONTROL STOP CORD ASSY L=3900
25 345-76023-0 * GROMMET 22-2.5
SHIFT (17 parts) SHIFT
Ref OEM Part # Part Name
1 345Q66110-3 SHIFT LEVER
2 345-66137-0 OIL SEAL 10-20-4
3 345-67101-0 BUSHING 10-12.8-42.5
4 945303-0800 E-RING d=8
5 332-61315-0 WASHER 10.5-18-1.5
6 345-66225-0 SHIFT ROD LEVER
7 930403-1000 NYLON NUT 10-P1.5
8 345-66121-0 SHIFT LEVER STOPPER
9 910903-6512 BOLT
10 345-66115-0 SHIFT LEVER STOP HOLDER
11 345-66119-0 SHIM t=0.2
12 965002-1605 BALL 5/16
13 332-66112-0 SPRING
14 9101F4-0618 BOLT
15 940113-0600 WASHER
16 348-66211-0 SHIFT ROD
17 332-66021-0 O-RING 2.4-5.8
TILLER HANDLE (27 parts) TILLER HANDLE
Ref OEM Part # Part Name
1 398Q63003-1 TILLER HANDLE ASSY
2 3M3Q63005-1 * TILLER HANDLE SUB-ASSY
3 398Q63011-1 ** TILLER HANDLE
4 369-72019-1 ** THROTTLE DECAL
5 9101E3-5675 ** BOLT
6 930403-0600 ** NYLON NUT 6-P1.0
7 398-63012-0 ** GRIP
8 921803-0525 ** SCREW
9 398-63041-0 ** THROTTLE SHAFT
10 345-63048-0 ** THROTTLE SHAFT DAMPER
12 398-63053-0 ** SPACER
13 951403-0310 ** SPRING PIN 3-10
14 3V1-63035-1 ** FRICTION PIECE
15 3V1-63077-0 ** ADJUSTING NUT
16 3V1-63036-0 ** SPRING
17 9101E3-0625 ** BOLT
18 941403-1000 ** WAVE WASHER d=10
19 346-63201-2 * BOLT
20 345-63207-0 * COLLAR 9.8-12.7-7.5
21 345Q63051-0 STEERING BRACKET
22 9101E3-5825 BOLT
23 346-63064-0 UNIVERSAL PINION
24 951403-0414 SPRING PIN 4-14
25 346-63066-1 COLLAR 15.9-17-9
26 940103-0800 WASHER
27 350-63046-0 BUSHING 8.4-10-11
28 345-66226-0 GROMMET 17-3
TOP COWL (11 parts) TOP COWL
Ref OEM Part # Part Name
1 361Q67645-1 TOP COWL ASSY
2 361Q67640-0 * TOP COWL SUB-ASSY
3 361-67501-0 ** TOP COWL SEAL L=1550
4 345Q67521-0 ** TILT HANDLE
5 921603-0516 ** SCREW
6 930103-0500 ** NUT
7 940103-0500 ** WASHER
8 941303-0500 ** SPRING WASHER
9 344-67503-0 ** STARTER SEAL
10 3C7-72180-3 * CAUTION DECAL (A)
11 361-87801-2 * DECAL SET (M40C)

100-Hour / Annual Service Checklist

Regular maintenance keeps your Tohatsu M40C 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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