Tohatsu M15D2 Troubleshooting
| Engine Model: Tohatsu M15D2 MF |
| Engine Type: 2-stroke 2-cylinder gasoline outboard engine |
| Total Displacement: 15.1 cu.in (247 cc) |
| Rated Engine Power: 15 Hp (11 kW) at 5800 rpm |
| Fuel System: Carburetor |
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| Engine hard to start or won't start |
Empty gas tank - Fill fuel up.
Wrong grade of gasoline - Change gasoline.
Fuel system clogged - Repair or replace.
Spark plug wire is disconnected or loose - Check spark plug wiring connection, repair or change.
Damaged spark plug - Replace spark plug.
Plugged fuel filter - Change fuel filter.
Carburetor is clogged - Clean the carburetor.
Dirty fuel lines - Clean fuel lines.
Fuel tank air vent restricted or closed - Open or clean air vent.
Low fuel pump pressure - Repair or change fuel pump.
Reed valve is defective or worn - Replace reed valve.
| Engine starts but stalls suddenly |
Spark plug is defective - Change spark plug.
Carburetor is faulty or dirty - Clean or replace carburetor.
Ignition coil is damaged - Install a new ignition coil.
Fuel tank air vent clogged or closed - Open or service air vent.
Fuel pump pressure is low - Change or rebuild fuel pump.
Ignition failure - Inspect ignition system and change faulty parts.
Fuel pump is defective or dirty - Check fuel pump and replace if necessary.
Problems with carburetor adjustment - Adjust as required.
Fuel lines are dirty - Clean fuel system lines.
Closed or restricted fuel tank air vent - Open or service air vent.
Fuel filter is dirty - Replace or clean fuel filter.
Gaskets are defective - Install new gaskets.
Engine is overloaded - Load reducing required.
Carburetor fuel mixture is too lean - Make the correct settings.
Bad ignition timing - Adjust ignition timing as required.
Thermostat is faulty - Change thermostat.
Faulty water pump - Replace water pump.
Improper propeller diameter or pitch - Replace propeller.
Damaged or bent propeller - Replace propeller.
Outboard motor is mounted too high or too low - Mount the motor as required.
Low octane fuel - Use correct fuel.
Engine is overloaded - Load reducing required.
Incorrect low idle setting - Adjust idle speed.
Dirty or defective fuel pump - Check fuel pump and change if required.
Main bearings or crankshaft failure - Crankshaft or bearings need to be replaced.
Worn cylinder bore or piston rings - Change faulty parts.
Incorrectly adjusted or clogged carburetor - Clean or correctly adjust carburetor.
Dirty or damaged fuel pump - Check fuel pump and replace if necessary.
Ignition failure - Check ignition system and replace faulty parts.
Gaskets are worn - Install new gaskets.
Powerhead parts are faulty - Change defective parts.
Propeller pitch or diameter incorrect - Replace propeller.
Damaged or bent propeller - Replace propeller.
Outboard engine mounting height improperly - Adjust the engine to correct transom height.
Incorrect trim angle - Make the correct trim angle adjustment.
Improper adjustment of carburetor main jet - Adjust the carburetor main jet correctly.
Defective or loose spark plug - Re-tighten or replace spark plug.
Sleeve, rings, or piston are damaged - Replace faulty parts as required.
| Engine vibrates excessively |
Damaged or improper size of propeller - Replace propeller.
Propeller shaft malfunction - Have propeller shaft replaced.
Weeds in the propeller - Remove and clean propeller.
Motor mounting bolt is loose - Tighten bolt.
Steering pivot is loose or damaged Tighten or replace.
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| Outboard Engines Technical Specifications |
| Small Engines Technical Specifications |
| Car Engines Technical Specifications |
| Industrial Engines Technical Specifications |
