Tohatsu M115/M140A2 (2018) Parts & Diagrams

OEM and aftermarket replacement parts for Tohatsu M115/M140A2. Scroll down for exploded parts diagrams (26), specifications, and maintenance reference.

Tohatsu M115/M140A2 (2018) Parts & Diagrams

🔎 Tohatsu M115/M140A2 Reference Library — Exploded parts diagrams (26 diagrams), specifications, common issues, and maintenance checklist.

The Tohatsu M115/M140A2 is a 2-Stroke outboard motor. Powers center-console boats, larger pontoons, and offshore-capable fishing craft.

Quick Reference Specifications

Specification Value
Engine Type 2-Stroke
Horsepower 115 HP
Displacement 1768
Bore x Stroke 88 x 72.7
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)
Full Throttle RPM Range 5200-5700
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 M115/M140A2:

  • 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 M115/M140A2.

Fig.01 CYLINDER・CRANK CASE (60 parts) Fig.01 CYLINDER・CRANK CASE
Ref OEM Part # Part Name
1 3C7B01100-3 CYL BLOCK & CRANKCASE ASSY
2 915324-1065 * STUD
3 915324-1055 * STUD
4 345-01111-0 * DOWEL PIN 6-12
5 345-00117-0 * DOWEL PIN
6 3T5-10166-0 * NIPPLE 4-2-6L型
7 338-01131-1 * NIPPLE 4.8-5
8 393-01131-0 * NIPPLE 5.5-5
9 931121-1000 * NUT 10-P1.25
10 916124-0840 * BOLT
11 916124-0850 * BOLT
12 916124-0865 * BOLT
13 916129-1065 * BOLT
14 345-01015-0 * WASHER 8.5-19.5-3.2
15 3B7-01116-0 * WASHER 10.5-20-3.2
16 3B7-60218-1 ANODE
17 910103-5630 BOLT
18 910103-0625 BOLT
19 930103-0600 NUT
20 3C7B01002-1 CYLINDER HEAD ASSY
21 3C7-01024-3 CYLINDER HEAD COVER GASKET
22 3C7B01021-2 CYLINDER HEAD COVER
24 3V2-60001-0 BOLT 6-35
25 3C7-01030-0 THERMOSTAT
26 3B7B01031-0 THERMOSTAT CAP
27 353-01032-0 THERMOSTAT CAP GASKET
28 9101F4-0645 BOLT
29 941303-0600 SPRING WASHER
30 3B7-01046-0 PLUG
31 3C7-01005-1 CYLINDER HEAD GASKET
32 3PN-01012-0 CYLINDER HEAD BOLT
33 3KK-01015-1 WASHER
34 3C7-01513-2 HANGER
35 9101F4-0820 BOLT
36 3C7B02300-2 EXHAUST COVER ASSY
37 3C7B02302-0 EXHAUST COVER (INNER)
38 3C7-02305-1 EXHAUST COVER GASKET
39 3C7-02095-0 BOLT
40 940103-0800 WASHER
41 9101F4-0630 BOLT
42 941322-0600 SPRING WASHER
43 940121-0600 WASHER
45 3C7B05101-1 BRACKET
46 9161F4-0845 BOLT
47 941322-0800 SPRING WASHER
48 9701-1-1016 SPARK PLUG(BR8HS-10)
49 393-01160-0 CHECK VALVE
50 98AL-40-220 HOSE
51 98AL-40-350 HOSE
52 98AL-40-480 HOSE
53 98AL-40-270 HOSE
54 338-01133-0 CLIP φ7
55 3PR-06972-0 CLAMP 6.5-47.5P
56 910103-6612 BOLT
57 3C7-01303-5 ENGINE BASEMENT GASKET
58 3B7-01291-2 CRANKCASE HEAD
59 171-00053-0 O-RING 2-74.5
60 3B7-00121-0 OIL SEAL 35-58-9
61 3C7-01215-0 OIL SEAL 19.6-35-10
62 910103-5620 BOLT
Fig.02 PISTON・CRANK SHAFT (17 parts) Fig.02 PISTON・CRANK SHAFT
Ref OEM Part # Part Name
1 3C7-00050-2 CRANKSHAFT ASSY W/GEAR
2 3C7-00118-0 * MAIN BEARING 6208
3 3B7-00116-0 * SPACER 40-52-7
4 353-64038-0 * SHIM 36-44-0.1
6 3B7-09060-0 * OIL PUMP DRIVE GEAR
7 945107-3500 * C-RING d=35
8 3B7-00115-0 THRUST PLATE 66-85-2
9 3C7-00042-0 ROLLER BEARING 20-25-28
10 353-00046-0 SMALL END BEARING WASHER
11 3C7-00113-0 MAIN BEARING 40-60-38
12 3E0-87124-0 PISTON RING SET (0.5 O/S)
13 3C7-00014-0 * PISTON RING (0.5 O/S)
14 3C7-00015-0 * PISTON RING (0.5 O/S)
15 3E0-87131-0 PISTON REPAIR KIT (0.5 O/S)
16 3C7-00004-1 * PISTON (0.5 O/S)
17 360-00021-1 * PISTON PIN
18 353-00024-1 * PISTON PIN CLIP
Fig.03 INTAKE MANIFOLD・REED VALVE (10 parts) Fig.03 INTAKE MANIFOLD・REED VALVE
Ref OEM Part # Part Name
1 3C7B02010-1 INTAKE MANIFOLD ASSY
2 915321-0618 * STUD
3 98AB-70-080 HOSE
4 98AB-70-180 HOSE
5 345-70114-1 CLIP φ11.3
6 3C7-02104-2 INTAKE MANIFOLD GASKET
7 910103-5635 BOLT
8 3A3-02100-0 REED VALVE ASSY
9 98AB-30-470 HOSE
10 338-01133-0 CLIP φ7
Fig.04 INTAKE SILENCER・CARBURETOR (55 parts) Fig.04 INTAKE SILENCER・CARBURETOR
Ref OEM Part # Part Name
1 3C7-02410-0 INTAKE SILENCER SUB-ASSY
2 3B7-67152-0 CHOKE LEVER
3 941403-1000 WAVE WASHER d=10
4 910103-0610 BOLT
5 346-67115-0 WASHER 6.5-21-1
6 910103-0625 BOLT
8 3B7-63734-0 STOPPER DAMPER
9 3B7-72015-0 CHOKE DECAL
10 3C7-02414-2 INTAKE SILENCER GASKET
11 3C7-02420-1 BOLT 6-20
12 3C7-02415-2 INTAKE SILENCER COVER
13 3C7-02418-3 GASKET
14 910103-5620 BOLT
15 910103-5635 BOLT
16 921503-5625 SCREW
19 3E0-03200-1 CARBURETOR ASSY
20 3C7-03204-1 CARBURETOR ASSY (SECOND)
21 3C7-03205-1 CARBURETOR ASSY (THIRD)
22 3C7-03210-1 CARBURETOR ASSY (FOURTH)
23 353-03221-0 * FLOAT CHAMBER
24 346-03222-0 * FLOAT CHAMBER O-RING
25 922503-6414 * SCREW
26 346-03231-0 * FLOAT
27 346-03232-0 * FLOAT ARM PIN
28 3B7-03240-0 * FLOAT VALVE
29 344-03244-0 * CLIP
30 3F3-03234-0 * SCREW
31 3C7-03252-0 * MAIN NOZZLE
32 3C7-03251-0 * MAIN JET (#162)
33 3C7-03255-0 * SLOW JET (#75)
34 346-03256-0 * RUBBER CAP
35 346-03265-0 * STOP SCREW
36 346-03267-0 * SPRING
37 346-03266-0 * PILOT SCREW
38 353-03268-0 * SPRING
39 345-03292-0 * DRAIN SCREW
40 336-03293-0 * O-RING
41 334-03242-0 * VALVE PIN
42 3C7-03181-0 * CARBURETOR COVER
43 3C7-03182-0 * CARBURETOR COVER GASKET
44 3C7-03183-0 * CARBURETOR COVER GASKET
45 3C7-03184-0 * COVER GASKET PLATE
46 3C7-03185-0 * COVER GASKET PLATE
47 3C7-03186-0 * SCREW
48 3C7-03292-0 * DRAIN SCREW
49 930103-0600 NUT
50 941303-0600 SPRING WASHER
51 3C7-02011-2 CARBURETOR GASKET
52 353-63709-1 THROTTLE ROD
53 3B7-05229-0 BALL JOINT CONNECTOR
54 3B7-05243-0 BALL JOINT CONNECTOR
55 930103-0500 NUT
56 3C7-67191-2 CHOKE ROD
57 345-05223-1 ROD SNAP 3.5-2
58 3C7-03271-2 O-RING 1.5-2.5
Fig.05 FUEL PUMP (32 parts) Fig.05 FUEL PUMP
Ref OEM Part # Part Name
1 3C7-04000-1 FUEL PUMP ASSY
2 3C7-04004-1 * PUMP COVER
3 922532-6533 * SCREW
4 3C7-04005-0 * PUMP DIAPHRAGM
5 3C7-04006-0 * DIAPHRAGM GASKET
6 3C7-04029-0 * PUMP DIAPHRAGM
7 3C7-04007-1 * DIAPHRAGM GASKET
8 3C7-04009-0 * SPRING
9 3C7-04022-0 * DIAPHRAGM COVER
10 3C7-04044-0 * CHECK VALVE
11 921532-0306 * SCREW
12 940103-0300 * WASHER
13 930103-0300 * NUT
14 346-04901-2 GASKET
15 921503-0645 SCREW
16 941303-0600 SPRING WASHER
17 3C7-02230-0 FUEL FILTER ASSY
18 3B7-02237-0 * CUP
19 3B7-02235-0 * O-RING
20 3B7-02234-0 * FILTER
21 3B7-02236-0 * O-RING
22 930103-0800 NUT
23 940103-0800 WASHER
24 98AB-70-320 HOSE
25 98AB-70-045 HOSE
26 98AB-70-310 HOSE
27 98AB-50-045 HOSE
28 98AB-50-100 HOSE
29 3C7-02092-0 PIPE JOINT 7-5
30 338-02215-0 CLIP φ10
31 3C7-02215-0 CLIP φ12
32 98AB-70-730 HOSE
Fig.06 THROTTLE (25 parts) Fig.06 THROTTLE
Ref OEM Part # Part Name
1 3B7B63711-3 ADVANCER ARM
3 3B7-05244-0 BALL JOINT
5 3C7-63716-1 THROTTLE ROD 5-149
6 3C7-63715-1 ROD 5-118
7 3B7-05243-0 BALL JOINT CONNECTOR
8 930103-0500 NUT
9 910103-6835 BOLT
10 3B7-63730-0 WASHER 8.5-24-1.5
11 3B7-63713-0 BUSHING 12-14-15.5
12 3B7-63731-0 WASHER 12.5-24-1
13 3B7-63732-1 COLLAR 8.4-12-17
14 3B7-63718-0 THROTTLE CAM
15 346-05228-1 BALL JOINT
16 941303-0600 SPRING WASHER
17 3B7-63721-0 COLLAR 8.4-12-26.3
18 3B7-63727-0 SPRING
19 3B7-63712-0 ADVANCER LEVER
20 3B7-63733-0 ROD SNAP 5-2.5
21 910103-0845 BOLT
22 940103-0800 WASHER
23 941303-0800 SPRING WASHER
24 945303-0400 E-RING d=4
25 3B7-83715-2 CABLE JOINT
26 3AA-83719-0 WASHER 8.5-18-1.6
27 951603-0800 SNAP PIN d=8
Fig.07 MAGNETO・STARTER MOTOR (40 parts) Fig.07 MAGNETO・STARTER MOTOR
Ref OEM Part # Part Name
1 3C7-06101-1 FLYWHEEL W/RING GEAR
2 3C7-06123-0 ALTERNATOR ASSY
3 921503-0628 SCREW
5 334-00131-0 KEY
6 3C7-00132-0 NUT 20-P1.25
7 3C7-00133-0 WASHER 20.5-37-5
8 3C7-06130-2 PULSAR COIL & PLATE ASSY
9 3B7-05244-0 BALL JOINT
10 941303-0600 SPRING WASHER
11 3C7-63722-1 GUIDE PLATE
12 3C7-00122-0 OIL SEAL 40-52-6
13 3C7-01403-0 O-RING 2.4-59.6
14 910121-7620 BOLT
15 3C7-63728-0 BUSHING
16 3C7-63723-0 SETTING PLATE
17 910103-6612 BOLT
18 3C7-06301-0 RING GEAR COVER
19 3C7-72182-2 CAUTION DECAL (C)
20 910103-0630 BOLT
21 3GF-06304-0 COLLAR 9.1-16-10.8
22 3B7-06305-0 RUBBER MOUNT 9-16-4.3
23 3C7-06306-0 WASHER 6.2-16-4
24 353-76010-4 STARTER MOTOR ASSY
25 353-76012-3 * POSITIVE BRUSH
26 353-76013-3 * NEGATIVE BRUSH
27 353-76017-1 * BRUSH SPRING
28 353-76015-1 * PINION ASSY
29 910103-0840 BOLT
30 941303-0800 SPRING WASHER
31 3B7-63730-0 WASHER 8.5-24-1.5
32 3C7-76003-1 SPACER 8.4-12-21.5
33 3C7-76004-0 STARTER MOTOR MOUNT
34 3C7-76005-0 STARTER MOTOR MOUNT
35 3C7-76007-1 DAMPER
36 353B76009-2 STARTER MOTOR BAND
37 910103-5840 BOLT
38 910103-5820 BOLT
40 3B7-76141-1 STARTER CABLE L=400
41 3C7-76141-1 STARTER CABLE L=300
42 3A3-76145-0 TERMINAL CAP 8-13-28
Fig.08 ELECTRIC PARTS (C.D. UNIT) (23 parts) Fig.08 ELECTRIC PARTS (C.D. UNIT)
Ref OEM Part # Part Name
1 3C7-06902-2 COVER
2 3C7-72028-1 WIRING DIAGRAM DECAL
4 3C7-06901-2 BRACKET
5 910103-0620 BOLT
6 930103-0600 NUT
7 3B7-63734-0 STOPPER DAMPER
9 346-67113-0 MOUNT 8.5-14-2.5
10 3B7-06920-0 RUBBER MOUNT 8.5-14-2.5
11 346-67114-1 SPACER 6.2-9-15.7
12 3C7-06160-1 CD UNIT
13 910403-0540 BOLT
14 940103-0500 WASHER
16 353-76213-0 SPARE FUSE 20A
17 910103-6612 BOLT
18 3C8-06048-0 IGNITION COIL ASSY W/LABEL
20 3C8-72181-0 * CAUTION DECAL (B)
21 3C7-06040-0 IGNITION COIL W/R-CAP
22 346-06999-0 * PLUG CAP W/RESISTANCE
23 910103-5620 BOLT
24 910103-6630 BOLT
25 346-67115-0 WASHER 6.5-21-1
26 3PR-06972-0 CLAMP 6.5-47.5P
27 3C7-06921-0 PLUG CAP W/RESISTANCE
Fig.09 ELECTRIC PARTS (DIAGRAM) (36 parts) Fig.09 ELECTRIC PARTS (DIAGRAM)
Ref OEM Part # Part Name
1 3C7-76065-2 RECTIFIER COMPLETE
2 398-06972-0 CLAMP 6.5-67P
3 910103-5625 BOLT
4 346-76040-0 STARTER SOLENOID
5 910103-6616 BOLT
6 3C8-72580-0 PTT SOLENOID SWITCH (A)
7 3C8-72581-0 PTT SOLENOID SWITCH (B)
7a 930103-0600 * NUT
7b 941303-0600 * SPRING WASHER
8 3C8-72583-1 SOLENOID SWITCH CORD (B) L=150
9 3C7-72582-0 SOLENOID SWITCH CORD (A) L=220
10 3C7-72583-0 SOLENOID SWITCH CORD (B) L=150
11 3A3-76145-0 TERMINAL CAP 8-13-28
12 3C7-76110-1 CORD ASSY
13 3C7-76119-0 CORD ASSY
14 3C7-76062-1 FUSE WIRE ASSY L=450
15 921503-6612 SCREW
16 3B7-76142-1 GROUND CABLE L=120
17 3B7-76120-2 BATTERY CABLE L=3000
18 3B7-76145-0 TERMINAL CAP 8-13-30
19 3C7-76050-0 CHOKE SOLENOID
20 353-76073-0 * PLUNGER
21 353-76057-2 CHOKE SOLENOID HOOK
22 951403-0312 SPRING PIN 3-12
23 910103-6625 BOLT
24 122-35083-0 RUBBER MOUNT 9-23-4
25 353-76079-0 COLLAR 6.2-9-9.3
27 3C7-76172-0 OVERHEAT SENSOR ASSY
28 3C7-76180-0 PRESSURE SWITCH ASSY
29 910103-6630 BOLT
30 346-67115-0 WASHER 6.5-21-1
31 346-67113-0 MOUNT 8.5-14-2.5
32 3B7-06920-0 RUBBER MOUNT 8.5-14-2.5
33 346-67114-1 SPACER 6.2-9-15.7
34 98AB-70-350 HOSE
35 3C7-02215-0 CLIP φ12
Fig.10 OIL PUMP (36 parts) Fig.10 OIL PUMP
Ref OEM Part # Part Name
1 3C7-09000-0 OIL PUMP ASSY
2 3B7-09002-0 * O-RING 1.6-19.2
3 3B7-09004-0 * AIR VENT BOLT
4 3B7-09006-0 * WASHER
5 3B7-09050-1 OIL PUMP BOLT
6 941303-0600 SPRING WASHER
7 3B7-09065-0 OIL PUMP DRIVEN GEAR
8 3B7-09069-0 BUSHING 9-20-20.8
9 99AA-4-0490 PIPE
10 3C7-09056-1 CLIP φ8.5
11 3C7-09075-1 CHECK VALVE COMPLETE
12 3C7-09053-1 OIL PUMP ROD
13 3B7-05243-0 BALL JOINT CONNECTOR
14 930103-0500 NUT
15 951703-0500 SNAP RETAINER d=5
16 3C7-71070-2 OIL TANK
17 3C8-71015-0 OIL FILLER CAP
18 3C8-71016-0 GASKET 36-52-2
19 3C8-71017-0 CAP HOOK
20 3C8-71018-0 OIL TANK CAP CHECK VALVE
21 3C7-71020-1 OIL LEVEL SENSOR
22 910103-6630 BOLT
23 346-67115-0 WASHER 6.5-21-1
24 346-67113-0 MOUNT 8.5-14-2.5
25 3B7-06920-0 RUBBER MOUNT 8.5-14-2.5
26 346-67114-1 SPACER 6.2-9-15.7
27 3C7-71030-0 OIL FILTER ASSY
28 3B7-02237-0 * CUP
29 3B7-02235-0 * O-RING
30 3C7-71033-0 * FILTER
31 3B7-02236-0 * O-RING
32 930103-0800 NUT
33 940103-0800 WASHER
34 99AA-6-1000 PIPE
35 99AA-6-0340 PIPE
36 3GT-35143-0 CLIP φ9.4
Fig.11 DRIVE SHAFT HOUSING (33 parts) Fig.11 DRIVE SHAFT HOUSING
Ref OEM Part # Part Name
1 3C7Q61210-1 APRON
2 3C7-61212-0 GROMMET
3 3E0-61213-0 SEAL
4 3C7-61216-0 PAD
5 9101E3-5612 BOLT
6 3B7-61180-0 EXHAUST HOUSING
7 3B7-61182-1 GROMMET
8 3B7-61207-0 IDLE EXHAUST PORT GROMMET
9 3C7Q61192-1 DRIVE SHAFT HOUSING (L)
10 3C7-61017-2 BOLT 10-107
11 3C7-61018-2 BOLT 10-120
13 3C7-61012-2 DRIVE SHAFT HOUSING GASKET
14 3B7Q61110-0 EXTENSION HOUSING
15 3T1-60001-1 BOLT 8-35
16 3B7-60001-5 BOLT 10-40
17 3B7-61112-1 STUD 10-165
18 9153E3-0825 STUD
19 9401E3-0800 WASHER
20 930103-0800 NUT
21 9402E3-1000 WASHER
22 3B7-61114-0 NUT 10-P1.25
23 3C7Q01301-1 ENGINE BASEMENT
24 345-01111-0 DOWEL PIN 6-12
25 910103-5635 BOLT
26 3C7-01312-0 BOLT 8-50
28 3C7-02311-0 EXHAUST PIPE
29 9101F4-0835 BOLT
31 941303-0800 SPRING WASHER
32 3C7-02312-2 EXHAUST PIPE GASKET
33 910103-0830 BOLT
34 940203-0800 WASHER 8.4-15.5-1.6
35 3B7-61181-2 EXHAUST HOUSING GASKET
36 3B7-61186-0 REVERSE GAS PASSAGE PIPE
Fig.12 GEAR CASE (DRIVE SHAFT) (62 parts) Fig.12 GEAR CASE (DRIVE SHAFT)
Ref OEM Part # Part Name
1 3C7Q60000-6 GEAR CASE ASSY
2 3C7-60211-1 * ROLLER BEARING 28.6-38.1-3
3 3C7-60017-0 NIPPLE 6-1/8
4 332-60005-2 PLUG 8-8
5 332-60006-0 GASKET 8.1-15-1
6 3B7-60012-1 GEAR CASE PLATE
7 9216E3-0614 SCREW
8 3B7-60013-0 GEAR CASE PLATE PLUG
9 3B7-60015-1 PLUG M10P1.25
10 3B7-60016-1 GASKET 10.1-15-1
11 3C7-64020-0 BEVEL GEAR B
12 353-64016-0 SHIM 52-60.5-0.1
13 3B7-64027-0 NUT M16-P1.5
14 3C7-64303-3 DRIVE SHAFT (UL)
15 3C7-60213-0 TAPERED ROLLER BEARING 0506
16 3C7-60214-0 BALL BEARING 16007
17 3C7-64327-1 DRIVE SHAFT SPRING
18 3C7-65021-1 WATER PUMP IMPELLER
19 3B7-65022-1 KEY 28-5.7-4
20 3C7-65016-0 PUMP CASE SUB-ASSY (UPPER)
21 3C7-65011-0 PUMP CASE LINER
22 3C7-65014-0 WATER PIPE SEAL (LOWER)
23 3C7-65018-0 PUMP CASE GASKET
24 3C7-65017-2 PUMP CASE (LOWER)
25 3C7-60223-1 OIL SEAL 22-42-7
26 346-64084-0 SHIM 35-41.9-0.5
27 3B7-65015-0 O-RING 3.1-54.4
28 334-65012-0 DOWEL PIN 4-10
29 9161E3-0885 BOLT
30 3C7-65025-0 WATER PUMP GUIDE PLATE
31 3C7-65029-0 GUIDE PLATE GASKET
32 3C7-64328-0 DRIVE SHAFT SPRING GUIDE
33 3C7-60210-0 WAVE WASHER d=47.2
34 3B7-66011-1 CLUTCH CAM
35 3B7-66014-1 CAM ROD (UL)
36 951403-3510 SPRING PIN 3.5-10
37 3B7-66031-1 CAM ROD BUSHING
38 345-66021-0 O-RING 1.9-6.8
39 3B7-66023-0 O-RING 3.5-27.7
40 353-66241-1 SHIFT ROD JOINT
42 353-66024-0 STOPPER
43 9101E3-5612 BOLT
44 3B7-60217-1 TRIM TAB
45 3B7-60219-0 TRIM TAB GASKET
46 915303-0825 STUD
47 940103-0800 WASHER
48 930403-0800 NYLON NUT 8-P1.25
49 951403-3516 SPRING PIN 3.5-16
50 3T1-60001-1 BOLT 8-35
51 3B7-60001-5 BOLT 10-40
52 9401E3-0800 WASHER
53 9402E3-1000 WASHER
54 98AL-40-920 HOSE
55 3C7-60018-0 NIPPLE 6-6
56 3T5-84398-0 BAND 104
57 3C7-65120-0 WATER PIPE (UL)
58 3C7-65206-0 WATER PIPE SEAL (UPPER)
59 345-65205-0 COLLAR 18-20-4.5
60 3C7-65204-0 WATER PIPE AUXILIARY MOUNT
61 3C7-60205-1 WATER STRAINER SET
62 921503-0445 * SCREW
63 930403-0400 * NYLON NUT 4-P0.7
Fig.13 GEAR CASE (PROPELLER SHAFT) (28 parts) Fig.13 GEAR CASE (PROPELLER SHAFT)
Ref OEM Part # Part Name
1 3C7-60215-0 TAPERED ROLLER BEARING 30209
2 3B7Q87323-1 PROPELLER SHAFT HOUSING ASSY
3 3B7Q60101-1 * PROPELLER SHAFT HOUSING
4 3B7-60211-0 * ROLLER BEARING 30-40-30
5 3B7-60111-0 * OIL SEAL 30-50-12
6 9601-0-6208 * BALL BEARING 6208
7 3B7-60103-0 * O-RING 3.1-94.4
8 3C7-60108-2 PRE-COATED BOLT 8-30
9 3C7-64010-0 BEVEL GEAR ASSY (A)
10 3B7-64011-0 * ROLLER BEARING 25-32-26
11 3T1-64093-0 BEVEL GEAR C
12 3B7-64016-0 SHIM 47-57-0.1
13 3B7-64035-0 WASHER t=2.8
14 3B7-64037-0 SHIM 42-50-0.1
15 3B7-64211-0 PROPELLER SHAFT
16 3T1-64215-2 CLUTCH
17 3B7-64218-0 PIN
18 3B7-64219-1 SNAP
19 3T1-64222-0 SPRING RETAINER L=30.5
20 346-64221-0 SPRING
21 3T1-64223-0 PUSH ROD
22 3T1-64224-0 BALL
23 353-64121-0 PROPELLER NUT M16P1.5
24 345-64124-0 WASHER 17-32-3
25 951503-0325 SPLIT PIN 3-25
26 3HKB64545-0 PROPELLER ASSY (21")
27 3HK-64238-0 * PROPELLER HUB KIT
28 3HK-64235-0 ** FORWARD THRUST WASHER
Fig.14 BRACKET (79 parts) Fig.14 BRACKET
Ref OEM Part # Part Name
1 3E0-62191-1 SWIVEL BRACKET SHAFT ASSY
2 346-62124-1 NYLON NUT 7/8-14
4 940103-0600 WASHER
5 3E0-62126-0 BUSHING 25.6-28.6-40
6 3E0-62116-1 WASHER 25.7-50-1
7 3E0Q62112-0 CLAMP BRACKET (R)
8 3E0Q62113-1 CLAMP BRACKET (L)
9 9102E3-1020 BOLT
10 9402E3-1000 WASHER
11 3E0-62121-1 THRUST ROD
12 3B7-62129-1 PIN
13 3E0Q62313-3 SWIVEL BRACKET ASSY
14 344-67177-1 * GREASE FITTING
16 3C7Q62010-1 STEERING SHAFT ASSY
17 3B7-62414-0 SEAL RING
18 3B7-62417-0 BUSHING 32-40-45
19 3B7-62423-1 THRUST PLATE (UPPER)
20 945103-3200 C-RING d=32
21 3B7-62415-0 O-RING 4.5-32
22 3C7-61301-0 RUBBER MOUNT (UPPER)
23 3C7-61307-2 BOLT 12-103
25 3C7-61335-0 WASHER 12.2-36-3
26 3C7-61341-1 MOUNT HOLDING PLATE (UPPER)
27 9101E3-5835 BOLT
28 3C7-61339-0 DAMPER (UPPER)
29 3C7Q61411-2 MOUNT BRACKET
30 353-61302-2 RUBBER MOUNT (LOWER)
31 353-61321-3 BOLT M12-151
33 3C7-61338-0 DAMPER 21-36-5
34 353-61315-1 WASHER 12.2-25-2
35 3B7-61324-0 NUT 12-P1.5
36 9402E3-1200 WASHER
37 3B7Q61342-0 MOUNT HOLDING PLATE (LOWER)
38 3N4-61343-0 BOLT 8-25
39 3C7-61336-0 DAMPER (LOWER)
40 3C7-60218-2 ANODE
41 910103-5630 BOLT
42 398-62396-1 GROUND L=130
44 3A3-62396-1 GROUND L=110
46 3C8-62396-1 GROUND L=210
47 910103-5612 BOLT
48 3Y9-62431-1 TILT STOPPER ASSY
49 951403-3516 * SPRING PIN 3.5-16
50 3Y9-62433-0 * TILT STOPPER GRIP
51 3T1-61315-0 * WASHER 10.5-18-2
52 3E0-62473-1 TILT STOPPER SPRING
53 353-63207-0 COLLAR 10.2-12-12
54 3E0-84905-0 DRAG LINK ASSY
55 3E0-84914-0 * SPACER 9.6-19-13
56 3E0-84917-0 * BOLT 3/8-50
57 353-84918-0 * NYLON NUT 3/8-24UNF
58 353-84916-0 * WASHER 9.6-18-2
59 3F3-84908-0 * SEAL RING
60 3E0-77150-1 PTT ASSY
61 3C8-77071-1 CYLINDER PIN (UPPER)
62 345-05122-1 WASHER 6.5-23-1.5
63 9101E3-0612 BOLT
64 3C8-77075-0 BUSHING 18-24-19
65 3E0-77076-0 BUSHING 18-20-20.5
66 369-60218-1 ANODE
67 910103-5616 BOLT
68 3E0-72574-0 TRIM SENSOR L=1500
69 9101E3-0620 BOLT
70 3R0-66308-0 WASHER 6-16-1.5
71 3PR-06972-0 CLAMP 6.5-47.5P
72 9101E3-5612 BOLT
73 3B7-77085-1 BOLT 12-20 P1.75
75 3E0-77101-2 CYLINDER PIN (LOWER)
76 346-62412-1 WASHER 22.6-30-2
77 945103-2200 C-RING d=22
78 3E0-77103-0 BUSHING 22-25.4-23.5
79 345-06915-0 CLAMP 6.5-14L
80 9215E3-5612 SCREW
81 3T5-84398-0 BAND 104
82 3C8-72120-0 RIGGING BOLT SET
83 3C7-62133-2 * BOLT 12-105 P1.25
84 353-61334-0 * WASHER 13-34-3
85 940103-1200 * WASHER
86 3C7-62139-1 * NUT 12-P1.25
Fig.15 POWER TRIM & TILT (45 parts) Fig.15 POWER TRIM & TILT
Ref OEM Part # Part Name
1 3E0-77180-2 MOTOR ASSY
2 3E0-77195-0 * YOKE ASSY
3 3E0-77190-0 * ARMATURE ASSY
4 353-77182-1 * O-RING
5 3E0-77192-0 * MOTOR BRACKET ASSY
6 3E0-77183-0 ** BRUSH
7 353-77191-0 ** BREAKER
8 3E0-77184-0 ** BRUSH SPRING
9 3E0-77199-1 BOLT
10 3E0-77430-1 PUMP
11 3E0-77434-0 * FILTER
12 3E0-77163-0 COUPLING
13 3B7-77167-0 O-RING 1.8-69.6
14 3E0-77176-1 MANUAL VALVE
15 3B7-77411-0 * O-RING
16 3E0-77407-0 * O-RING
17 3E0-77408-0 * BACK-UP RING
18 9450E3-1800 C-RING d=18
19 3E0-77365-1 PISTON ROD ASSY
20 3E0-77383-0 * O-RING
22 3B7-77377-1 FREE PISTON
23 3B7-77375-0 O-RING
24 3B7-77376-0 BACK-UP RING
25 3E0-77388-0 TRIM PISTON ASSY
26 3B7-77392-0 * O-RING
27 3B7-77393-0 * BACK-UP RING
28 3E0-77395-0 ROD GUIDE SUB-ASSY
29 3E0-77398-0 * O-RING
30 3E0-77472-1 PLUG
31 3B7-77179-0 O-RING
32 3E0-77475-0 FILTER
33 3E0-77479-0 ORIFICE
34 3E0-77165-0 RESERVE TANK
35 3E0-77168-0 CAP
36 3E0-77169-0 O-RING
37 3E0-77159-1 BOLT
38 3E0-77431-1 BOLT
39 3E0-77432-1 BOLT
40 3E0-77167-0 O-RING
41 3E0-77557-0 ORIFICE
42 3E0-77558-0 BALL
43 3E0-77559-0 PIN
44 3B7-77169-0 O-RING
45 3E0-77453-0 VALVE SEAT
46 3E0-77456-0 FILTER
Fig.16 BOTTOM COWL (36 parts) Fig.16 BOTTOM COWL
Ref OEM Part # Part Name
1 3C7Q67100-1 BOTTOM COWL
2 3BA-01138-0 NIPPLE 6.8-3-10
3 98AB-50-480 HOSE
4 3C7-76142-1 GROUND CABLE L=170
5 3PR-06972-0 CLAMP 6.5-47.5P
6 910103-6612 BOLT
7 353-06972-0 CLAMP 7-80P
8 345-67113-0 MOUNT 12-18-2.5
9 3C7-67114-1 SPACER 8.4-12-17
10 3C7-67164-0 GROMMET
11 3C7-67160-0 GROMMET 34-16-9.5
12 3C7-77156-0 GROMMET 20-6
13 345-66226-0 GROMMET 17-3
14 3C7-72577-0 CLAMP
15 910103-5616 BOLT
16 3E0-72615-0 PTT SWITCH ASSY
17 3F3-72616-1 GASKET
18 3F3-72617-1 PTT SWITCH ASSY BRACKET
19 910103-6614 BOLT
20 3C7-02215-0 CLIP φ12
21 353-67512-0 COVER STAY (FRONT)
22 353-67513-0 COVER STAY (REAR)
23 910103-6618 BOLT
24 940103-0600 WASHER
25 3C7-70260-0 FUEL CONNECTOR (MALE)
26 3C7-70253-0 NUT 12-P1.25
27 152-01612-0 GASKET 12.1-17-0.5
28 3C7-83732-0 GROMMET
29 3C7-76116-0 GROMMET
30 3B7-83720-0 CLIP
31 910103-6616 BOLT
32 9101E3-0835 BOLT
33 3B7-63730-0 WASHER 8.5-24-1.5
34 3C7Q76118-0 CLAMP
35 910103-5625 BOLT
37 3A3-72026-0 SPARK PLUG DECAL (BR8HS10)
Fig.17 SHIFT (20 parts) Fig.17 SHIFT
Ref OEM Part # Part Name
1 3C7-66110-0 SHIFT ROD LEVER
2 930403-1000 NYLON NUT 10-P1.5
3 3C7-66225-0 SHIFT LEVER SHAFT
4 353-66145-1 HOLDER
5 3T1-60108-0 PRE-COATED BOLT 8-25
6 332-61315-0 WASHER 10.5-18-1.5
7 353-83728-1 PIN
8 930103-0600 NUT
9 941303-0600 SPRING WASHER
10 353-66215-1 SHIFT ROD (L)
11 3C7-66148-0 LINK ROD ASSY (SHIFT)
12 951603-0800 SNAP PIN d=8
13 3AA-83719-0 WASHER 8.5-18-1.6
14 3B7-66122-2 SHIFT ARM
15 910103-0835 BOLT
16 3B7-63713-0 BUSHING 12-14-15.5
17 3B7-63732-1 COLLAR 8.4-12-17
18 941303-0800 SPRING WASHER
19 3B7-63730-0 WASHER 8.5-24-1.5
20 3B7-63731-0 WASHER 12.5-24-1
Fig.18 TOP COWL (26 parts) Fig.18 TOP COWL
Ref OEM Part # Part Name
1 3T1-72043-0 OIL CAUTION DECAL
2 3C7Q67645-5 TOP COWL ASSY
3 3J6Q67640-1 * TOP COWL SUB-ASSY
4 3C7-67501-1 ** TOP COWL SEAL L=1940
5 353-67517-1 ** LOCATING BRACKET
6 921703-5520 ** SCREW
7 9301F1-0500 ** NUT
8 941303-0500 ** SPRING WASHER
9 353Q67141-0 ** HOOK LEVER
10 353-67147-1 ** SEAL RING
11 353-67105-0 ** HOOK LEVER BUSHING 12-14-12
12 338-62435-0 ** O-RING 1.5-9.5
13 353-67142-1 ** COVER HOOK
14 910103-6616 ** BOLT
15 3C8-66308-0 ** WASHER 6-16-1.5
16 3C7Q67521-0 ** TILT HANDLE
17 910103-0616 ** BOLT
18 910103-0630 ** BOLT
19 3B7Q67210-0 ** FILLER LID
20 3B7-67211-0 ** FILLER LID HINGE
21 3B7-67212-0 ** SPRING
22 930103-0600 ** NUT
23 941303-0600 ** SPRING WASHER
24 3B7-67213-0 ** SEAL
25 3C7-72180-3 * CAUTION DECAL (A)
26 3J6-87802-3 * DECAL SET (M115A2) (M115A2)
Fig.19 FUEL TANK (20 parts) Fig.19 FUEL TANK
Ref OEM Part # Part Name
1 3E0-70200-1 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
6 332-70201-0 * CLAMP
7 98AB-70-700 * HOSE
8 98AB-701600 * HOSE
9 3B7-70280-1 * FUEL CONNECTOR MARK
10 3GF-70281-0 * FUEL CONNECTOR
11 3C7-70250-0 * FUEL CONNECTOR
12 3C7-70201-0 * CLAMP
13 3KY-70177-0 FUEL TANK ASSY 25L
17 3C7-70050-2 * FUEL GAUGE VENT CAP ASSY (25L)
18 3E0-70270-0 * QUICK-CONNECTOR (MALE)
19 3RS-70021-0 ** TANK FILLER CAP GASKET
20 3AC-70157-0 * FUEL PICK-UP ASSY W/GAUGE
21 3AC-70140-0 * SCREW
22 3AC-70145-0 * WASHER
23 3AC-70150-0 * GASKET
Fig.20 COMPONENT PARTS OF REMOTE CONTROL (52 parts) Fig.20 COMPONENT PARTS OF REMOTE CONTROL
Ref OEM Part # Part Name
1 3U2B84370-0 REMOTE CONTROL HEAD ASSY(RC12E)
2 3A3-84365-1 * THROTTLE ARM
3 3A3-84428-0 * THROTTLE FRICTION ARM
4 945303-0600 * E-RING d=6
5 353-84394-0 * WASHER
6 3U2-84427-0 * ADJUSTING SCREW
7 3A3-84381-0 * SHIFT GEAR ASSY
8 3A3-83314-2 * CABLE TERMINAL
9 3A3-84364-2 * DRIVE GEAR
10 930103-0500 * NUT
11 910103-0525 * BOLT
12 3A3-84376-0 * GROMMET
13 3U2B84441-0 * REAR HOUSING
14 3U2B84366-0 * REAR PANEL
15 3U2-84401-0 * NEUTRAL LOCK ARM
16 3A3-84403-0 * NEUTRAL LOCK SPRING
17 3U2-84404-0 * GRIP
18 3U2-84343-0 * CONTROL LEVER
19 3A3-84368-0 * WAVE WASHER
20 3A3-84391-0 * FREE THROTTLE DRUM
21 3A3-84435-0 * BUSHING
22 3A3-84422-0 * THRUST PLATE
23 921603-0512 * SCREW
24 3U2-84339-0 * INSTRUCTION DECAL
25 3A3-84432-0 * BUSHING
26 3U2-84375-0 * SCREW
27 3VK-84375-0 * SCREW
28 3VL-84375-0 * SCREW
29 3A3-84374-0 * SPACER
30 353-84371-0 * WASHER
31 3U2-84371-0 * WASHER
32 930103-0600 * NUT
33 3A3-84383-0 * WASHER
34 3A3-84421-0 * ROLLER
35 3U2-84431-0 * BUSHING
36 940103-0800 * WASHER
37 3U2-84442-0 * BOLT
38 353-84388-0 * DETENT ROLLER
39 3U2B84312-0 * FREE THROTTLE LEVER
40 921503-0406 * SCREW
41 3A3-84423-0 * DETENT RETAINER
42 3A3-84307-0 * DETENT SPRING
43 3A3-84424-0 * FREE THROTTLE ROLLER
44 3A3-84426-0 * ROLLER RETAINER
45 3A3-84425-0 * FREE THROTTLE SPRING
46 3VK-63107-0 * COVER
47 3U2-63506-0 * HOLDER
48 3U2-84917-0 * BOLT
49 3U2-77367-0 * JOINT
50 3U2-72187-0 * CAUTION DECAL(SIGP)
51 3U2B84440-0 * FRONT HOUSING
52 3U2-06973-0 * CLAMP
Fig.21 COMPONENT PARTS OF REMOTE CONTROL (ELECTRIC PARTS) (17 parts) Fig.21 COMPONENT PARTS OF REMOTE CONTROL (ELECTRIC PARTS)
Ref OEM Part # Part Name
1 3GF-76020-0 MAIN SWITCH ASSY
2 3GF-76219-0 * MAIN SWITCH KEY
3 3GF-76205-0 * MAIN SWITCH KEY COVERING CAP
4 3C7-76115-1 CORD ASSY L=6200
5 353-72546-0 ASSIST CORD (RED) L=200
6 3U2-84331-0 DECAL (LEVER)
7 3U2-84336-0 SHIFT POSITION DECAL
8 3A3-84398-0 BAND
9 3U2-84398-0 BAND
10 3A3-76086-1 NEUTRAL SWITCH (REMOTE CONT)
11 921503-5316 SCREW
12 3C8-76171-0 OVERHEAT BUZZER
13 3A3-06830-0 STOP SWITCH ASSY
14 353-06821-0 * STOP SWITCH LANYARD ASSY
15 3U2-72200-0 STOP SWITCH DECAL
16 3U2-84334-0 REMOTE CONTROL LOGO DECAL
17 3U2-72615-0 PTT SWITCH ASSY
Fig.22 ACCESSORIES (14 parts) Fig.22 ACCESSORIES
Ref OEM Part # Part Name
1 3C8-72100-1 TOOL KIT
2 3B7-72043-0 OIL CAUTION DECAL
3 3B7-72201-0 SAFETY ROPE φ5-1600
4 3C7-72537-0 METER LEAD WIRE
5 3C7-72603-0 METER EXTENSION CORD ASSY
6 3C7-72646-1 MULTI-FUNCTION METER ASSY
7 3B7-72658-0 * OIL BULB 12V-1.7W
8 3B7-72656-0 * METER DAMPER
9 3C7-72660-0 * FITTING PLATE
10 930203-0500 * NUT
11 941303-0500 * SPRING WASHER
12 3B7-60007-0 FLUSHING PLUG
13 3B7-64231-2 THRUST HOLDER
14 3B7-64233-1 STOPPER
Fig.22 AOPTIONAL PARTS (1) (6 parts) Fig.22 AOPTIONAL PARTS (1)
Ref OEM Part # Part Name
1 3GL-72571-0 TRIM METER KIT
2 3GL-72524-0 HOUR METER ASSY
3 3GL-72529-0 VOLTMETER ASSY
4 3GL-72598-0 WATER PRESSURE METER KIT
5 3GL-72672-0 SPEEDOMETER KIT (60MPH)
6 3GL-72596-0 FUEL METER ASSY
Fig.23 OPTIONAL PARTS (2) (14 parts) Fig.23 OPTIONAL PARTS (2)
Ref OEM Part # Part Name
9 3E0-72526-0 WATER TEMPERATURE METER KIT
10 3E0-72597-0 * WATER TEMPERATURE METER ASSY
16 3B7-72514-0 * WATER TEMPERATURE SENSOR
17 3B7-72518-0 * LEAD WIRE L=7700
18 3E0-72529-0 VOLTMETER ASSY
21 3B7-72662-0 * FITTING PLATE
37 3E0-72524-0 HOUR METER ASSY
38 3B7-72657-0 * METER BULB 12V-1.7W
39 3B7-72655-0 * METER DAMPER
40 3B7-72664-0 * FITTING PLATE
41 930203-0400 * NUT
42 941303-0400 * SPRING WASHER
43 353-72521-1 METER LAMP SWITCH
44 353-72548-0 ASSIST CORD (BLK) L=200
Fig.24 OPTIONAL PARTS (3) (20 parts) Fig.24 OPTIONAL PARTS (3)
Ref OEM Part # Part Name
1 3A3-81301-0 TWIN REMOTE CONTROL KIT
2 353-84904-0 DRAG LINK SPACER
3 3C7-84490-3 CONTROL HEAD ASSY (TOP-SINGLE)
4 3C7-84540-3 CONTROL HEAD ASSY (TOP-TWIN)
5 3C7-84480-1 * REMOTE CONT HEAD (TOP-SINGLE)
6 3C7-84520-1 * REMOTE CONT HEAD (TOP-TWIN)
7 3Z5-84462-0 ** DECAL (TOHATSU)
8 353-76020-3 * MAIN SWITCH ASSY
9 805-76201-1 * MAIN SWITCH PANEL
10 921146-4516 * SCREW
11 3A3-06830-0 * STOP SWITCH ASSY
12 3C7-76115-1 * CORD ASSY L=6200
13 178-34147-0 * BAND LEAD WIRE 200
14 353-72546-0 * ASSIST CORD (RED) L=200
15 3C8-76171-0 * OVERHEAT BUZZER
16 3C7-84475-0 * PTT SWITCH CORD
17 3C7-84476-0 * PTT SWITCH CORD
18 3C7-84477-0 * PTT SWITCH CORD
19 3C7-84470-1 * NEUTRAL SWITCH CORD
20 3C7-84471-1 * NEUTRAL SWITCH CORD
Fig.25 ASSEMBLY・KIT PARTS (10 parts) Fig.25 ASSEMBLY・KIT PARTS
Ref OEM Part # Part Name
1 3C7Q87304-A LOWER UNIT ASSY (UL)
2 3C7-76114-0 EXTENSION CORD L=2000
3 3C7-72604-0 METER EXTENSION CORD L=2000
4 3C7B87090-F ENGINE SHORT BLOCK KIT
5 922503-6414 * SCREW
6 3C8-71016-0 * GASKET 36-52-2
7 940103-0800 * WASHER
8 3C7-65239-1 * WATER PUMP GUIDE PLATE
9 3C7-87321-2 LOWER UNIT GASKET SET
10 98AL-40-920 * HOSE

100-Hour / Annual Service Checklist

Regular maintenance keeps your Tohatsu M115/M140A2 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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