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10 – English
TROUBLE SHOOTING
Starting
Idling (low speed)
Adjust the L-screw
Leaking inlet manifold (rubber)
Loose carburettor mounting
Loose or faulty fuel pipe
Blocked fuel filter
Blocked fuel line
Tank ventilator blocked
Throttle valve axle stiff
Throttle sticks
Defective throttle return spring
Bent valve axle stop
Faulty diffuser jet
Adjust the L screw
Worn needle/needle tip
Control system set too high
Worn lever arm in the control system
Leaking diaphragm/cover plate
Control system sticking
Does not idle
Too rich idling
Adjust the L-screw
Air filter blocked
Choke does not work
Worn choke axle
Worn choke valve
Blocked fuel filter
Blocked fuel line
Piston ring seized
Blocked impulse channel
Loose or faulty fuel pipe
Hole in diaphragm
Worn needle/needle tip
Control system sticking
Control system set too high
Leaking control system (air or fuel)
Cover on the carburettor’s pump side
is loose
Worn needle/needle tip
Control system set too high
Control system sticking
Difficult to start
Carburettor leaks
fuel
Idling (low speed) (continued)
Idling with closed L
screw
Worn needle/needle tip
Leaking diaphragm/cover plate
Control system sticking
Worn lever arm in the control system
Faulty diffuser jet
Blocked fuel filter
Blocked fuel line
Leaking inlet manifold (rubber)
Loose carburettor mounting
Worn throttle valve axle
Loose throttle valve screw
Worn throttle valve
Control system sticking
Leaking control system (air or fuel)
Control system’s centre knob is worn
Hole in diaphragm
Leaking diaphragm/cover plate
Leaking crankcase
Blocked fuel line
Control system set too high
Control system sticking
Leaking control system (air or fuel)
Leaking diaphragm/cover plate
Faulty diffuser jet
Leaking crankcase
Control system set too high
Control system sticking
Damaged control system
Worn needle/needle tip
Leaking diaphragm/cover plate
Incorrectly fitted control system
Trouble shooting chart
The different faults that can occur on the chain saw are divided
into four groups as follows. Within each group possible
operating faults are listed to the left while the probable fault
alternatives are listed to the right. The most likely fault is listed
first, etc.
Too much fuel while
idling
L-screw needs
constant adjustment
Uneven idling
Floods when the
engine is not running