Tohatsu M60C Troubleshooting
| Engine Model: Tohatsu M60C |
| Engine Type: 2-stroke 3-cylinder gasoline outboard engine |
| Total Displacement: 57.2 cu.in (938 cc) |
| Rated Engine Power: 60 Hp (44 kW) at 5500 rpm |
| Fuel System: Carburetor |
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| Engine hard to start or doesn't start |
Empty gas tank - Add gasoline.
Low-quality gasoline - Change fuel.
Air in the fuel system - Air bleeding.
Loose or disconnected spark plug wire - Inspect spark plug wiring connection, change or repair.
Spark plug is damaged - Install new spark plug.
Clogged fuel filter - Replace fuel filter.
Carburetor not adjusted - Adjust according to instructions.
Clogged fuel lines - Service fuel lines.
Fuel tank air vent clogged or closed - Open or service air vent.
Low fuel pump pressure - Replace or repair fuel pump.
Reed valve is defective or worn - Replace reed valve as required.
| Engine starts but then stalls |
Faulty spark plug - Install new spark plug.
Faulty or clogged carburetor - Carburetor needs to be replaced or cleaned.
Defective ignition coil - Ignition coil should be replaced.
Closed or clogged fuel tank air vent - Open or clean air vent.
Low fuel pump pressure - Replace or repair fuel pump.
Ignition system failure - Check ignition and replace faulty components.
Dirty or faulty fuel pump - Service or change fuel pump.
Carburetor is dirty - Wash, clean and adjust.
Fuel lines are clogged - Service fuel lines.
Fuel tank air vent restricted or closed - Open or service air vent.
Dirty fuel filter - Fuel filter needs to be replaced.
Damaged gaskets - Change gaskets.
Engine is overloaded - Reduce engine load.
Carburetor is running lean - Make the correct settings.
Ignition timing is wrong - Set the ignition timing correctly.
Thermostat failure - Replace thermostat.
Water pump malfunction - Replace water pump.
Propeller selection improperly - Check the propeller size.
Damaged or bent propeller - Replace propeller.
Outboard motor is mounted too high or too low - Mount the motor as required.
| Abnormal engine knocking or noise |
Stale fuel - Use proper gasoline.
Engine is overloaded - Load reducing required.
Low idle speed setting is not correct - Adjust idling as required.
Dirty or faulty fuel pump - Clean or change fuel pump.
Crankshaft or main bearings are worn out - Worn parts replacement required.
Cylinder bore or piston rings are worn - Replace defective parts.
Dirty or incorrectly adjusted carburetor - Adjust carburetor properly or service it.
Fuel pump is defective or dirty - Clean or change fuel pump.
Ignition system failure - Check ignition and replace faulty components.
Worn gaskets - Install new gaskets.
Powerhead components are worn - Replace defective components as required.
Improper propeller diameter or pitch - Check the propeller size.
Damaged or bent propeller - Have propeller repaired or replaced.
Motor mounted at incorrect height on transom - Check the outboard engine mounting height.
Improper trim angle - Adjust trim angle.
| Excessive fuel consumption |
Carburetor main jet adjustment is improper - Adjust the carburetor main jet properly.
Spark plug is faulty or loose - Change or re-tighten spark plug.
Worn sleeve, rings, or piston - Replace faulty components.
| Engine vibrates excessively |
Damaged or improper size of propeller - Replace propeller.
Propeller shaft damaged - Replace propeller shaft.
Weeds wraped around propeller - Clean the propeller.
Engine mounting bolt is not tightened - Tighten bolt.
Damaged or loose steering pivot Tighten correctly or replace.
Low battery output - Recharge the battery.
Battery drains quickly - Service or change the battery.
Bad terminals or disconnected battery cables - Connect wiring correctly or install new terminals.
Starter motor failing - Starter should be replaced.
| Trim motor runs but trim system does not move up or down |
Insufficient oil - Need to add the oil.
Pump assembly is defective - Check pump and replace if necessary.
Manual release valve leaking - Close the valve or change it.
Faulty pump driveshaft or motor - Change worn component.
| Trim cannot be fully up or down |
Pump assembly is damaged - Replace pump.
Tilt ram piston ball is not positioned correctly - Service or repair.
Damaged tilt ram piston O-ring - Replace O-ring.
Oil insufficient - Fill up oil.
Lower check valve not seating in port side trim ram - Secure valve properly.
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| Outboard Engines Technical Specifications |
| Small Engines Technical Specifications |
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| Industrial Engines Technical Specifications |
