OVERHEATS
(Possible Situations)
1) Excessive engine loading.
2) Lack of proper lubrication.
3) Cooling air flow obstructed or
clogged cooling fins.
SURGES OR
RUNS UNEVENLY
(Possible Situations)
1) Fuel cap vent obstructed.
2) Dirty air Filter.
ENGINE MISFIRES
(Possible Situations)
1) Wrong or fouled spark plug.
ENGINE VIBRATES
EXCESSIVELY
(Possible Situations)
1) Bent crankshaft.
2) Loose mounting bolts.
LACKS POWER
(Possible Situations)
1) Air intake obstructed.
2) Lack of lubrication.
3) Crankcase seals or gaskets
leaking.
WILL NOT START
(Possible Situations)
1) Toggle switch not turned on.
2) Safety flag not inserted.
3) Out of gas and oil mixture.
(Possible Solutions)
1) Make sure the engine is not being overloaded.
Remove excess load.
2) Make sure the fuel mixture contains the correct
ratio of certified 2-cycle oil to gasoline. Replace the
fuel supply if questionable.
3) Check for clogged cooling fins or obstructions to
the air flow.
(Possible Solutions)
1) Check the fuel cap to make sure it is venting.
Loosen the cap and retry engine operation.
2) Replace or clean the air filter if applicable.
(Possible Solutions)
1) Check the spark plug for a fouled condition.
Replace if questionable.
(Possible Solutions)
1) Remove the engine drive and check the at-
tached equipment for an out of balance condition.
2) Check the engine mounting bolts, make sure
they are tight.
(Possible Solutions)
1) Check the air intake for an obstruction (dirty filter,
saturated filter, or other debris).
2) Check the fuel / oil mixture for the gasoline being
fresh and the proper amount and kind of oil used.
Replace if questionable.
3) Inspect the intake gaskets, crankcase seals or
gaskets for a leaking condition. Use a commercially
available crankcase pressure tester and follow the
testers recommended test procedure.
(Possible Solutions)
1) Make sure toggle switch is turned on and that no
wires have been pulled out of housing.
2) Check to make sure the safety flag is inserted
and that no wires have been pulled out of housing.
3) Refer to Tecumseh owner’s manual for starting
engine.
TROUBLESHOOTING ENGINE OPERATION PROBLEMS
