Tohatsu M6/8/9.8B (2016) Parts & Diagrams

OEM and aftermarket replacement parts for Tohatsu M6/8/9.8B. Scroll down for exploded parts diagrams (19), specifications, and maintenance reference.

Tohatsu M6/8/9.8B (2016) Parts & Diagrams

🔎 Tohatsu M6/8/9.8B Reference Library — Exploded parts diagrams (19 diagrams), specifications, common issues, and maintenance checklist.

The Tohatsu M6/8/9.8B is a 2-Stroke outboard motor. Designed for dinghies, inflatable boats, and small tenders where lightweight portability is essential.

Quick Reference Specifications

Specification Value
Engine Type 2-Stroke
Horsepower 6 HP
Displacement 169
Bore x Stroke 50 x 43
Spark Plug (Type & Gap) NGK BPR7HS-10
Engine Oil Capacity
Recommended Engine Oil TC-W3 Certified 2-Stroke Oil
Gear Case Oil Capacity 320 mL
Idle Speed (in gear) 750
Full Throttle RPM Range 5000-6000
Fuel Unleaded Gasoline, 87 Octane min.

Always verify specifications against your owner's manual for your specific serial number range.

Common Issues & Recommended Parts

Below are common maintenance scenarios for the Tohatsu M6/8/9.8B:

  • 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 M6/8/9.8B.

ASSEMBLY・KIT PARTS (11 parts) ASSEMBLY・KIT PARTS
Ref OEM Part # Part Name
1 3B2Q87304-7 LOWER UNIT ASSY (UL)
2 3K9B87090-6 ENGINE SHORT BLOCK KIT
3 922553-6423 * SCREW
4 3K9-87121-4 POWER HEAD GASKET SET
5 3B2Q63003-2 * TILLER HANDLE ASSY
6 940103-0600 * WASHER
7 3B2-65239-0 * WATER PUMP GUIDE PLATE
8 3B2-87321-4 LOWER UNIT GASKET SET
9 9101E3-5635 * BOLT
10 910103-0610 * BOLT
11 951403-0312 * SPRING PIN 3-12
BOTTOM COWL (31 parts) BOTTOM COWL
Ref OEM Part # Part Name
1 3B2-67151-0 CHOKE ROD
2 3B2Q67100-1 BOTTOM COWL
3 369-02230-0 FUEL FILTER ASSY
4 98AB-50-075 HOSE
5 3B2-02212-0 FUEL HOSE
6 345-76023-0 GROMMET 22-2.5
7 338-02215-0 CLIP φ10
8 369-67104-0 CHOKE ROD BUSHING
9 3B2-70260-1 FUEL CONNECTOR (MALE)
10 332-70261-0 NUT 10-P1.25
11 336-70112-0 GASKET 10.2-16-0.5
12 398-76080-1 NEUTRAL SWITCH
13 398-76083-0 NEUTRAL SWITCH ACTUATOR
14 3B7-63731-0 WASHER 12.5-24-1
15 398-06830-0 STOP SWITCH ASSY
16 353-06821-0 * STOP SWITCH LANYARD ASSY
17 3B2-76026-1 MAIN SWITCH ASSY
18 9101E3-5620 BOLT
19 369Q67141-1 HOOK LEVER
20 338-67147-0 SEAL RING 13.8-22-3.7
21 369-67105-0 HOOK LEVER BUSHING
22 3C8-67146-0 WASHER 14-22-1
23 941403-1400 WAVE WASHER d=14
24 369-67142-0 COVER HOOK
25 910103-0612 BOLT
26 3C8-66308-0 WASHER 6-16-1.5
27 3B2-63621-0 GROMMET 19.8-2
29 353-67162-0 GROMMET 41-14-3
30 3B2-67187-0 GROMMET 16-17.5
31 345-66226-0 GROMMET 17-3
32 369-72026-0 SPARK PLUG DECAL (BPR7HS10)
BRACKET・REVERSE LOCK (51 parts) BRACKET・REVERSE LOCK
Ref OEM Part # Part Name
1 3V1Q62112-1 CLAMP BRACKET (R)
2 3V1Q62113-1 CLAMP BRACKET (L)
3 309-62115-2 BOLT 8-122
4 930403-0800 NYLON NUT 8-P1.25
5 9401E3-0800 WASHER
6 307-62116-1 WASHER 8.5-28-1
7 3B2-62118-0 DISTANCE PLATE
8 9216E3-0612 SCREW
9 369-62146-1 STERN BRACKET SPRING
10 921703-0406 SCREW
11 369-62147-0 WASHER 4.3-16-1.5
12 350-62121-2 THRUST ROD
13 369-62122-2 THRUST ROD SPRING
14 3B2Q62310-0 SWIVEL BRACKET
15 344-67177-1 GREASE FITTING
16 345-62441-0 FRICTION PIECE
17 346-62421-1 FRICTION SPRING
18 9101E3-0830 BOLT
19 3B2-66322-1 REVERSE LOCK
20 3B2-66321-1 REVERSE LOCK ROD
21 945303-0500 E-RING d=5
22 3B2-66315-0 REVERSE LOCK SPRING
23 3B2-66305-0 REVERSE LOCK LINK
24 345-05224-0 ROD SNAP 5-2.5
25 3B2-66302-0 REVERSE LOCK LINK JOINT
26 951503-0214 SPLIT PIN
27 3B2Q62010-0 STEERING SHAFT ASSY
28 3B2-62422-0 THRUST PLATE (UPPER) 22-44-2
29 3B2-62415-0 O-RING 4.25-19.5
30 3B2-62417-0 BUSHING
31 3B2-61301-0 RUBBER MOUNT (UPPER)
32 3B2-61337-0 DAMPER (UPPER)
33 3B2-61336-0 DAMPER (LOWER)
34 3B2-61302-0 RUBBER MOUNT (LOWER)
35 3K9Q61401-0 MOUNT BRACKET (R)
36 3K9Q61402-0 MOUNT BRACKET (L)
37 9101E3-5640 BOLT
39 910103-5612 BOLT
40 3A3-62396-1 GROUND L=110
41 3V1-62431-1 TILT STOPPER ASSY
42 3AS-62433-0 * TILT STOPPER GRIP
43 393-62437-1 BUSHING
44 369-62439-1 SETTING PLATE
45 9101E3-5612 BOLT
46 3V1Q62105-0 CLAMP SCREW KIT
47 3V1Q62108-0 * CLAMP SCREW ASSY
48 3V1-62106-0 ** CLAMP SCREW
49 332Q62102-1 ** CLAMP SCREW HANDLE
50 3C8-62104-2 ** RIVET 3-22
51 332-62101-1 * CLAMP SCREW PAD
52 3C8-62107-0 * SHOULDER BOLT
CARBURETOR・FUEL PUMP (34 parts) CARBURETOR・FUEL PUMP
Ref OEM Part # Part Name
1 3K9-03200-0 CARBURETOR ASSY
2 3K9-03252-0 * MAIN NOZZLE
3 3K9-03251-0 * MAIN JET (#95)
4 3K9-03254-0 * SLOW JET (#50)
5 346-03256-0 * RUBBER CAP
6 369-03231-0 * FLOAT
7 3R3-03239-0 * FLOAT VALVE ASSY
8 344-03244-0 * CLIP
9 346-03232-0 * FLOAT ARM PIN
10 3F3-03234-0 * SCREW
11 3B2-03221-0 * FLOAT CHAMBER
12 369-03222-0 * FLOAT CHAMBER O-RING
13 922503-6414 * SCREW
14 369-03292-0 * DRAIN SCREW
15 369-03293-1 * GASKET
16 346-03265-0 * STOP SCREW
17 346-03267-0 * SPRING
18 346-03266-0 * PILOT SCREW
19 356-03268-0 * SPRING
20 369-03304-0 * PUMP BODY
21 369-03305-0 * CHECK VALVE
22 921522-0306 * SCREW
23 930121-0300 * NUT
24 369-03301-0 * PUMP COVER
25 922553-6423 * SCREW
26 369-03302-0 * PUMP COVER GASKET
27 369-03303-0 * DIAPHRAGM A
28 369-03306-0 * DIAPHRAGM B
29 369-03307-0 * PUMP BODY GASKET
30 369-03181-0 * CARBURETOR COVER
31 369-03182-0 * CARBURETOR COVER GASKET
32 369-03183-0 * CARBURETOR COVER GASKET
33 369-03186-0 * SCREW
34 346-67196-1 ROD SNAP 3-B
COMPONENT PARTS OF REMOTE CONTROL (49 parts) COMPONENT PARTS OF REMOTE CONTROL
Ref OEM Part # Part Name
2 3B7Q84360-1 REMOTE CONTROL HEAD ASSY (RC5D)
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
50 369-84418-0 * GROMMET
51 353-84321-0 * GROMMET
52 369-84416-0 * GROMMET
COMPONENT PARTS OF REMOTE CONTROL (ELECTRIC PARTS) (6 parts) COMPONENT PARTS OF REMOTE CONTROL (ELECTRIC PARTS)
Ref OEM Part # Part Name
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
13 398-06830-0 STOP SWITCH ASSY
14 353-06821-0 * STOP SWITCH LANYARD ASSY
CYLINDER・CRANK CASE (33 parts) CYLINDER・CRANK CASE
Ref OEM Part # Part Name
1 3K9B01100-1 CYL BLOCK & CRANKCASE ASSY
2 393-01137-0 * NIPPLE 5-4-5
4 345-01111-0 * DOWEL PIN 6-12
5 393-01131-0 * NIPPLE 5.5-5
6 916129-0675 * BOLT
7 916129-0650 * BOLT
8 916129-0630 * BOLT
10 910124-0880 * BOLT
11 940121-0800 * WASHER
13 3K9B01001-0 CYLINDER HEAD ASSY
14 350-01093-0 * WELCH PLUG
15 3B2-01005-1 CYLINDER HEAD GASKET
16 9161F9-0630 BOLT
17 940121-0600 WASHER
18 350-01030-1 THERMOSTAT
19 3B2B02300-0 EXHAUST COVER ASSY
20 3K9B02302-0 EXHAUST COVER (INNER)
21 3K9-02305-2 EXHAUST COVER GASKET
22 9101F4-0625 BOLT
23 309-06972-0 CLAMP 6.5-47.5P
24 3B2-01214-1 CRANKCASE HEAD GASKET
25 393-01160-0 CHECK VALVE
26 98AL-40-120 HOSE
27 98AL-40-230 HOSE
28 3T5-01133-0 CLIP φ8
29 338-01133-0 CLIP φ7
30 3B2-01210-0 CRANKCASE HEAD
31 3B2-01215-0 OIL SEAL 12-28-5
32 3B2-00122-1 OIL SEAL 20-40-7
33 3B2-01217-0 SPACER 22-27.5-1
34 910103-5620 BOLT
35 3B2-01303-2 ENGINE BASEMENT GASKET
36 9701-1-1014 SPARK PLUG (BPR7HS10)
DRIVE SHAFT HOUSING (13 parts) DRIVE SHAFT HOUSING
Ref OEM Part # Part Name
1 3B2Q61192-1 DRIVE SHAFT HOUSING (L)
3 3B2-61012-2 DRIVE SHAFT HOUSING GASKET
4 3B2-01111-0 DOWEL PIN 6-16
5 369-66043-1 GROMMET 10.7-3.5
6 3B2Q61110-2 EXTENSION HOUSING
7 9101E3-5635 BOLT
8 3B2-60003-1 DRIVE SHAFT BUSHING (UL)
9 3V1-64332-0 STOPPER
10 9101E3-5612 BOLT
11 3B2-02311-0 EXHAUST PIPE
12 3B2-02312-2 EXHAUST PIPE GASKET
13 910103-5618 BOLT
14 910103-5612 BOLT
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 3B2-70167-1 FUEL TANK ASSY 12L
13 3B2-70050-1 * FUEL GAUGE VENT CAP ASSY (12L)
14 3B2-70155-0 * PICK-UP ELBOW ASSY (12L)
15 3E0-70270-0 * QUICK-CONNECTOR (MALE)
16 3C7-70199-0 * O-RING
17 3C7-70113-0 * FILTER
GEAR CASE (60 parts) GEAR CASE
Ref OEM Part # Part Name
1 3B2Q60000-2 GEAR CASE ASSY
2 3B2-60211-0 * ROLLER BEARING 15-21-16
3 9601-0-6204 BALL BEARING 6204
4 9161E3-0635 BOLT
5 9401E3-0600 WASHER
6 332-60005-2 PLUG 8-8
7 332-60006-0 GASKET 8.1-15-1
8 3V1-60217-0 TRIM TAB
9 910103-5620 BOLT
10 3AA-60206-0 WATER STRAINER W=17
11 921503-0430 SCREW
12 930403-0400 NYLON NUT 4-P0.7
13 3B2Q60100-1 PROPELLER SHAFT HOUSING ASSY
14 345-65015-0 * O-RING 3.2-47
15 369-60111-0 * OIL SEAL 15-28-10
16 9601-0-6004 * BALL BEARING 6004
17 9101E3-5620 BOLT
18 3B2-64010-0 BEVEL GEAR ASSY (A)
19 3B2-64020-0 BEVEL GEAR B
20 3B2-64030-0 BEVEL GEAR C
21 369-64032-0 WASHER 15.2-19-1.9
22 369-64015-0 SHIM 21-28-0.15
23 3V1-64211-1 PROPELLER SHAFT
24 3B2-64215-0 CLUTCH
25 301-64217-0 PIN 3.5-28
26 3V1-64221-0 SPRING
27 369-64223-0 PUSH ROD
28 3B2-64222-0 SPRING RETAINER
29 3B2-65021-1 WATER PUMP IMPELLER
30 3B2-65022-0 KEY φ3-11
31 3B2-65016-0 PUMP CASE (UPPER)
32 3B2-65011-0 PUMP CASE LINER
33 331-65014-0 WATER PIPE SEAL (LOWER)
34 3B2-65018-2 PUMP CASE GASKET
35 3B2-65025-0 WATER PUMP GUIDE PLATE
36 3B2-65029-2 GUIDE PLATE GASKET
37 9161E3-0650 BOLT
38 940103-0600 WASHER
39 3V1-65017-0 PUMP CASE (LOWER)
40 309-60111-0 OIL SEAL 12-24-8
41 3B2-65020-1 PUMP CASE GASKET (LOWER)
42 3B2-64083-0 SHIM 28-36.8-0.3
43 3B2-64309-1 DRIVE SHAFT ASSY (UL)
44 9601-0-6301 BALL BEARING 6301
45 369-66011-0 CLUTCH CAM
46 951403-0310 SPRING PIN 3-10
47 3B2-66014-0 CAM ROD (UL)
48 369-66031-0 CAM ROD BUSHING
49 369-66021-1 O-RING 2.5-4.9
50 332-66032-0 O-RING 2.4-15.4
51 369-66033-0 STOPPER
52 910103-5625 BOLT
53 3B2-65120-0 WATER PIPE (UL)
54 3B2-65195-0 GROMMET 14-2
55 3B2B64519-1 PROPELLER ASSY (9.5")
56 3V1-87326-1 PROPELLER HARDWARE KIT
57 3B2-64230-2 * THRUST HOLDER ASSY
58 369-64124-0 * WASHER 10.5-28-2
59 369-64121-0 * PROPELLER NUT
60 951503-0318 * SPLIT PIN 3-18
INTAKE MANIFOLD・REED VALVE・THROTTLE (21 parts) INTAKE MANIFOLD・REED VALVE・THROTTLE
Ref OEM Part # Part Name
1 3B2B02010-0 INTAKE MANIFOLD ASSY
2 3B2-02104-1 INTAKE MANIFOLD GASKET
3 3B2-02105-1 INTAKE MANIFOLD GASKET
4 3B2-02100-0 REED VALVE ASSY
5 3B2-02411-0 INTAKE SILENCER
7 3B2-02416-0 SPACER
8 3C8-66308-0 WASHER 6-16-1.5
9 941303-0600 SPRING WASHER
10 9161F1-0685 BOLT
12 369-02011-0 CARBURETOR GASKET
13 3B2-63711-0 ADVANCER ARM
14 3B2-63611-0 THROTTLE DRUM
15 3B2-63506-1 HOLDER
16 921521-6520 SCREW
17 3B2-63751-0 THROTTLE ARM
18 3B2-63715-2 ROD 5-45
19 3B7-05243-0 BALL JOINT CONNECTOR
20 930103-0500 NUT
21 345-05224-0 ROD SNAP 5-2.5
22 3B2-63716-1 THROTTLE ROD
23 346-67196-1 ROD SNAP 3-B
MAGNETO・ELECTRIC PARTS (51 parts) MAGNETO・ELECTRIC PARTS
Ref OEM Part # Part Name
1 3B2-06101-0 FLYWHEEL ASSY
2 3B2-06194-1 FLYWHEEL ASSY W/GEAR
3 3B2-06103-3 * COIL PLATE ASSY W/ALTERNATOR
4 3B2-06102-2 * COIL PLATE ASSY
5 3B2-06120-0 ** EXCITER COIL
7 3B2-06135-0 ** HOLDER
8 921521-6406 ** SCREW
9 3B2-06123-1 ** ALTERNATOR ASSY (80W)
10 921521-6625 ** SCREW
11 3B2-63724-0 SETTING PLATE
12 921621-0612 SCREW
13 3K9-05233-0 COIL PLATE STOPPER
14 921503-6510 SCREW
16 346-05228-1 BALL JOINT
17 3B2-06170-0 CD UNIT ASSY
18 346-06999-0 * PLUG CAP W/RESISTANCE
19 3C8-72181-0 * CAUTION DECAL (B)
20 3B2-06162-0 SPACER 6.2-9-27
21 9101F4-0620 BOLT
22 9101F4-0645 BOLT
23 940103-0600 WASHER
24 338-00131-0 KEY 16-5.7-4
25 369-00132-0 NUT 12-P1.25
26 940121-1200 WASHER
27 350-76010-0 STARTER MOTOR ASSY
28 350-76015-0 * PINION ASSY
29 350-76012-0 * POSITIVE BRUSH
30 350-76013-0 * NEGATIVE BRUSH
31 350-76014-0 * BRUSH HOLDER
32 916103-0830 BOLT
33 941303-0800 SPRING WASHER
34 350-76011-0 STARTER MOTOR BRACKET
35 398-06972-0 CLAMP 6.5-67P
36 309-06972-0 CLAMP 6.5-47.5P
37 910103-5610 BOLT
38 910103-5825 BOLT
40 345-06917-1 CLAMP 9-20U
41 346-76040-0 STARTER SOLENOID
42 910103-6620 BOLT
43 930103-0600 NUT
44 3B2-76060-0 RECTIFIER COMPLETE
45 921503-0525 SCREW
46 941303-0500 SPRING WASHER
47 930103-0500 NUT
48 3B2-76120-1 BATTERY CABLE L=2000
49 3B2-76147-2 STARTER CABLE L=200
50 3A3-76145-0 TERMINAL CAP 8-13-28
51 3B7-76145-0 TERMINAL CAP 8-13-30
52 3B2-76062-0 FUSE WIRE ASSY L=355
53 346-76212-0 * FUSE 15A
54 3C7-06921-0 PLUG CAP W/RESISTANCE
OPTIONAL PARTS (ACCESSORIES) (22 parts) OPTIONAL PARTS (ACCESSORIES)
Ref OEM Part # Part Name
1 312-72201-0 SAFETY ROPE φ4-1000
2 369-72100-0 TOOL KIT
3 346-76160-2 RECTIFIER KIT
4 3B2-06128-0 ALTERNATOR KIT
5 921521-6625 * SCREW
6 369-76167-0 EXTENSION CORD (LIGHT) L=2000
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
14 345-67169-0 GROMMET 40-13-3
15 361-72543-0 SEPARATE CORD
16 3B2B05180-0 VERTICAL STARTER KIT
17 3B2B05911-0 * VERTICAL STARTER GUIDE
18 9101F4-0654 * BOLT
19 940103-0600 * WASHER
20 930103-0600 * NUT
21 3B2-05912-0 * SEAL
23 336-60007-0 FLUSHING PLUG
PISTON・CRANK SHAFT (20 parts) PISTON・CRANK SHAFT
Ref OEM Part # Part Name
1 3B2-00069-0 CRANKSHAFT SUB-ASSY
2 3B2-00040-0 * CONNECTING ROD
3 3B2-00043-0 ROLLER BEARING 17-23-14
4 3B2-00031-0 * CRANKSHAFT A
5 3B2-00032-0 * CRANKSHAFT B
6 3B2-00033-0 * CRANKSHAFT C
7 3B2-00034-0 * CRANKSHAFT D
8 3B2-00061-2 * CRANK PIN
9 350-00062-0 * SEALING PLUG
10 3B2-00051-0 * OIL SEAL 25-47-7
11 369-00115-0 * THRUST PLATE
13 9603-3-6204 BALL BEARING 6204
14 338-00042-0 ROLLER BEARING 14-18-19
15 101-00121-0 OIL SEAL 20-35-7
16 3B2-87131-0 PISTON REPAIR KIT (0.5 O/S)
17 3B2-00004-1 * PISTON (0.5 O/S)
18 3B2-00021-1 PISTON PIN
19 350-00024-1 PISTON PIN CLIP
20 3G0-87124-0 PISTON RING SET (0.5 O/S)
21 3B2-00014-0 * PISTON RING (0.5 O/S)
RECOIL STARTER・STARTER LOCK (31 parts) RECOIL STARTER・STARTER LOCK
Ref OEM Part # Part Name
1 3B2-05000-1 RECOIL STARTER ASSY
2 3B2-05105-0 * STARTER CASE
3 3B2-05010-1 * STARTER SPRING SET
4 3B2-05104-0 * REEL
5 369-05012-0 * RETURN SPRING
6 3B2-05003-1 * RATCHET
7 369-05007-0 * FRICTION SPRING
8 3B2-05138-1 * BOLT
9 3B2-05006-1 * FRICTION PLATE
10 3B2-05013-0 * STARTER ROPE φ4.5-1620
11 3B2-05019-0 * STARTER HANDLE
12 3B2-05131-1 * ROPE ANCHOR
13 3B2-05116-0 * SEALING PLATE
14 338-05252-0 * STARTER LOCK
15 921503-5430 * SCREW
16 338-05255-0 * COLLAR 4-6-21
17 338-05216-0 * STARTER LOCK SPRING
18 3B2-05253-0 * STARTER LOCK CAM
19 941403-0800 * WAVE WASHER d=8
20 921503-7616 * SCREW
21 3M2-05215-0 * COLLAR 6.1-8-4
22 3B2-05217-1 STARTER LOCK ROD
23 3K9-05223-0 ROD SNAP 4-2
24 3B2-05901-1 STARTER PULLEY
25 9101F4-0620 BOLT
26 940103-0600 WASHER
27 3B2B05101-0 BRACKET
28 3B2B05102-0 BRACKET
29 910121-6623 BOLT
30 910121-6612 BOLT
31 3PR-06972-0 CLAMP 6.5-47.5P
REMOTE CONTROL (26 parts) REMOTE CONTROL
Ref OEM Part # Part Name
3 3B2-83880-3 REMOTE CONTROL FITTING ASSY
4 3A1-83722-0 * BALL JOINT HOLDER
5 332-83723-0 * HOLDER CAP
6 332-83724-0 * SPRING
7 332-83725-0 * WASHER 5.5-14-1.2
8 3B2-83820-0 * CABLE CLIP ASSY
9 910103-6616 * BOLT
10 930103-0600 * NUT
11 369-83830-2 * STEERING HOOK PLATE
12 910103-5830 * BOLT
13 930103-0800 * NUT
14 941303-0800 * SPRING WASHER
15 940103-0800 * WASHER
16 369-83726-0 * THROTTLE LEVER
17 369-67105-0 * HOOK LEVER BUSHING
18 338-67147-0 * SEAL RING 13.8-22-3.7
19 941403-1400 * WAVE WASHER d=14
20 3B2-83887-1 * THROTTLE LEVER
21 910103-6612 * BOLT
22 3C8-66308-0 * WASHER 6-16-1.5
23 3B2-83863-1 * THROTTLE LEVER ROD
24 3B2-83865-0 * NUT 10-32UNF
25 345-05224-0 * ROD SNAP 5-2.5
26 3A1-83710-1 * CABLE JOINT ASSY
30 3K9-83857-0 REMOTE CONTROL STOP CORD ASSY L=5900
31 345-66226-0 * GROMMET 17-3
SHIFT (15 parts) SHIFT
Ref OEM Part # Part Name
1 3B2-66211-0 SHIFT ROD
2 3B2-66241-0 SHIFT ROD JOINT
3 951403-0310 SPRING PIN 3-10
4 3B2-66110-0 SHIFT LEVER
5 3K9-66137-0 OIL SEAL 14-20-4.5
6 3B2-05211-1 STARTER LOCK ARM
7 350-67101-0 BUSHING
8 3B2-66225-0 SHIFT ROD LEVER
9 951703-0800 SNAP RETAINER d=8
10 3C8-66112-0 SHIFT LEVER STOPPER
11 9101F4-0610 BOLT
12 940103-0600 WASHER
13 3C8-66116-0 SHIFT LEVER STOPPER
14 3K9-05223-0 ROD SNAP 4-2
15 945303-1000 E-RING d=10
TILLER HANDLE (MF・EF MODEL) (22 parts) TILLER HANDLE (MF・EF MODEL)
Ref OEM Part # Part Name
1 3B2Q63003-2 TILLER HANDLE ASSY
2 3B2Q63005-2 * TILLER HANDLE SUB-ASSY
3 3B2Q63011-1 ** TILLER HANDLE
4 350-63012-2 ** GRIP
5 3B2-63041-0 ** THROTTLE SHAFT
6 345-63048-0 ** THROTTLE SHAFT DAMPER
7 350-63046-0 ** BUSHING 8.4-10-11
8 920803-0518 ** SCREW
9 3B2-63035-1 ** FRICTION PIECE
10 3B2-63034-0 ** ADJUSTING SCREW M6-16
11 940103-0600 ** WASHER
13 369-72019-1 ** THROTTLE DECAL
14 3B2-63104-1 ** STUD
15 3B2-63063-0 ** THROTTLE SHAFT SUPPORT
16 9215E3-0612 ** SCREW
17 3B2-63102-0 * BUSHING
18 3B2-63600-1 * THROTTLE WIRE
19 3B2-63108-0 * WASHER 30-45-1
20 3B2-63109-0 * WAVE WASHER 30-45-1.2
21 3B2-63103-0 * STEERING HANDLE STOPPER
22 941303-0600 * SPRING WASHER
23 930103-0600 * NUT
TOP COWL (9 parts) TOP COWL
Ref OEM Part # Part Name
1 3B2Q67645-7 TOP COWL ASSY
2 3B2Q67640-1 * TOP COWL SUB-ASSY
3 3B2-67501-1 ** TOP COWL SEAL L=1700
4 3B2-67503-0 ** STARTER SEAL
5 3B2Q67521-1 ** TILT HANDLE
6 930403-0600 ** NYLON NUT 6-P1.0
7 940103-0600 ** WASHER
8 3C7-72180-3 * CAUTION DECAL (A)
9 3K9-87801-2 * DECAL SET (M9.8B)

100-Hour / Annual Service Checklist

Regular maintenance keeps your Tohatsu M6/8/9.8B 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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