Fault Possible cause Remedy
Throttle cable incorrectly adjusted Have checked by qualified expert per-
sonnel
Air filter clogged Clean the air filter, replace if necessary
Engine oil level too high Check the engine oil level, if necessary
drain of
f engine down to the "MAX" mark
Clean the air intake
Have checked by qualified expert per-
sonnel
Exhaust blocked Clean the exhaust
Engine defective Have checked by qualified expert per-
sonnel
Carburettor defective Have checked by qualified expert per-
sonnel
Engine runs irregu-
larly
Basic setting of governor arm de-
adjusted
Have checked by qualified expert per-
sonnel
Insufficient engine
power
Spark plug defective Check the spark plug, replace if neces-
sary
Incorrect valve clearance Check, adjust if necessary
Valve or valve seat worn or damaged Have checked by qualified expert per-
sonnel
Cylinder, piston or piston rings worn Have checked by qualified expert per-
sonnel
Engine runs with
high speed, but no
vibration
Centrifugal clutch defective Have checked by qualified expert per-
sonnel
Mechanical defect Have checked by qualified expert per-
sonnel
Troubleshooting – Engine faults
DR6X
104
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