Fault location
Fault
System
Cutting disc does not
Clutch
start turning
Engine does not start
Ignition system
or with difficulty
Fuel supply
Compression system
Mechanical fault
Clutch
Warm start problems
Carburetor
Engine starts, but dies
Fuel supply
immediately
Insufficient
Several systems may
performance
simultaneously be
affected
Observation
Cause
Engine runs
Damage to clutch
Ignition spark O.K.
Fault in fuel supply or compression system, mechanical defect
No ignition spark
STOP-switch operated, wiring fault or short circuit, spark plug or
connector defective, ignition module faulty
Fuel tank filled
Incorrect choke position, carburetor defective, fuel supply line bent or
blocked, fuel dirty
No compression when
Cylinder head gasket defective, crankshaft seals damaged, cylinder or
pulled over
piston rings defective or improper sealing of spark plug
Starter not engaging
Broken starter spring, broken parts inside of the engine
Contamination
Ratchet spring contaminated and opened, have it cleaned
adheres to clutch and
around parts
Tank filled, ignition
Carburetor contaminated, have it cleaned
spark existing
Tank filled
Incorrect idling adjustment, suction head or carburetor contaminated
Fuel tank vent defective, fuel supply line interrupted, cable or STOP-
switch faulty
Engine idling poor
Air filter contaminated, carburetor contaminated, muffler clogged,
exhaust duct in the cylinder clogged
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