Tecumseh HH60 Troubleshooting
| Engine Model: Tecumseh HH60 |
| Engine Type: 4-cycle 1-cylinder L-head air-cooled gasoline |
| Total Displacement: 13.5 cu.in (222 cc) |
| Rated Engine Power: 6 Hp (4.5 kW) at 3600 rpm |
| Fuel System Type: Float carburetor with adjustable jet |
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| Engine doesn't start or starts hard |
Empty gas tank - Add fuel.
Incorrect fuel grade - Use correct gasoline grade.
Water or air in fuel system - Remove air or water from system.
Spark plug wire is disconnected or loose - Inspect the spark plug wire connection, replace or repair.
Damaged spark plug - Install new spark plug.
Dirty fuel filter - Install new filter.
Safety contact for brake pedal defective - Install new part.
Incorrect carburetor adjustment - Adjust carburetor idle mixture screw.
Engine has bad compression - Check cylinder block and change wear parts.
Throttle cable is worn or adjusted improperly - Adjust properly or replace the cable.
Cooling fins are blocked - Wash or clean as required.
Ignition system malfunction - Check ignition system and replace faulty parts.
Throttle cable is stuck or defective - Clean or replace the cable.
Dirty air filter element - Change or service air filter.
Fuel pump is damaged or dirty - Check fuel pump and replace if necessary.
| Engine starts and stalls immediately |
Faulty spark plug - Install new spark plug.
Faulty or dirty carburetor - Clean or change carburetor.
Faulty ignition coil - Ignition coil should be replaced.
Valve springs are weak or broken - New valve springs need to be installed.
Valves are stuck - Valves need to be cleaned.
Not enough engine oil - Check oil level and add oil as required.
Engine overload - Reduce load.
Cooling fins are clogged - Need to clean or wash.
Carburetor mixture is too lean - Set the carburetor correctly.
Incorrect ignition timing - Adjust ignition timing as required.
Valve setting is improper - Set the valves properly.
| Abnormal engine knocking or noise |
Stale fuel - Change fuel.
Engine is under excessive load - Reduce engine load.
Engine oil level is insufficient - Check and refill engine oil.
Incorrectly adjusted low idle speed - Correct idle settings.
Dirty or faulty fuel pump - Clean or replace fuel pump.
Worn main bearings or crankshaft - Replace crankshaft or bearings.
Valve clearance is not correct - Need to adjust valve clearance.
Damaged cylinder bore or piston rings - Change defective components.
Clogged or incorrectly adjusted carburetor - Clean or properly adjust carburetor.
Clogged air filter - Replace or clean air filter.
Fuel pump is damaged or dirty - Clean or replace fuel pump.
Ignition system malfunction - Inspect ignition system and change failed components.
Damaged cylinder-head gasket - Replace the head gasket.
Burned or stuck valves - Clean or replace valves.
Damaged or worn push rod - Replace push rod.
Cylinder block components are worn - Replace defective components as required.
Clogged oil filter (if equipped) - Change or service oil filter.
| Excessive fuel consumption |
Choke did not open fully - Change or adjust choke cable.
Improper adjustment of carburetor main jet - Adjust the carburetor main jet properly.
Defective or loose spark plug - Re-tighten or replace spark plug.
Stuck, burned, or worn valves - Service or change valves.
Piston, sleeve, or rings are damaged - Change faulty components.
Improper valve clearance - Need to adjust valve clearance.
| Engine oil consumption is too high |
Seals or gaskets are defective - New components need to be installed.
Valve stems or guides are damaged - Valves need to be changed.
Piston rings are stuck or broken - Piston rings replacement required.
Piston or cylinder liner is scuffed - Inspect liner and piston, replace as necessary.
Clogged breather hose or pipe - Change or service.
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