M140A2 - Outboard motor Tohatsu - Free user manual and instructions
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| Product Type | Outboard Motor |
| Brand | Tohatsu |
| Model | M140A2 |
| Engine Type | 2-stroke, V4 |
| Displacement | 1,752 cc |
| Maximum Output | 140 HP (104.4 kW) |
| Full Throttle RPM Range | 5,000 - 6,000 rpm |
| Fuel Type | Unleaded gasoline (87 octane min) |
| Fuel Induction System | Carburetor |
| Starting System | Electric start |
| Steering | Remote steering (standard) |
| Gear Ratio | 1.86:1 |
| Weight | Approx. 150 kg (331 lbs) |
| Shaft Length | 20 inches (508 mm) |
| Transom Height | 20 inches |
| Oil Injection | Automatic oil injection |
| Cooling System | Water-cooled with thermostat |
| Ignition System | CDI (Capacitor Discharge Ignition) |
| Alternator Output | 12V, 15A (optional) |
| Trim & Tilt | Power trim and tilt |
| Recommended Fuel | Unleaded regular gasoline with TC-W3 oil |
| Maintenance | Regular oil change, spark plug inspection, gear oil replacement |
| Safety Features | Emergency stop switch, overheat alarm, low oil alarm |
Frequently Asked Questions - M140A2 Tohatsu
What type of oil should I use for the Tohatsu M140A2 outboard?
Use TC-W3 certified 2-stroke outboard oil. Ensure it is mixed with gasoline at the recommended ratio (typically 50:1).
How often should I change the gear oil?
Change the gear oil after the first 20 hours of operation, then every 100 hours or annually, whichever comes first.
What is the fuel-to-oil ratio for the M140A2?
The recommended fuel-to-oil ratio is 50:1 (2% oil) using TC-W3 outboard oil.
How do I winterize my Tohatsu M140A2?
Run the engine with fogging oil, drain the fuel system, change gear oil, and store upright in a dry place. Refer to manual for detailed steps.
What is the maximum RPM for this outboard?
The full throttle operating range is 5,000 - 6,000 rpm. Do not exceed 6,000 rpm.
How do I troubleshoot an overheating alarm?
Check the water intake for debris, ensure the water pump impeller is not damaged, and verify the thermostat is functioning.
What spark plugs are recommended?
Use NGK B7HS or equivalent. Gap should be 0.028-0.031 inches (0.7-0.8 mm).
Can I use ethanol-blended fuel?
Yes, up to 10% ethanol (E10) is acceptable. Higher blends may damage seals and fuel system components.
How often should I replace the water pump impeller?
Replace the impeller every 200 hours or every 2 years to prevent overheating.
Where can I find replacement parts for Tohatsu M140A2?
Authorized Tohatsu dealers or online marine parts suppliers. Use genuine Tohatsu parts for best performance.
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