Fault Location - Makita EK7650H Original Instruction Manual

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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