RedMax GZ3500T Workshop Manual page 54

Trouble shooting
8.1 Trouble shooting
The different faults which may occur on the chain saw are divided into four groups. 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.
Starting
Starting Adjust the L-screw
difficulties Clogged air filter
Choke does not work
Worn choke shaft
Worn choke valve
The fuel filter is clogged
The fuel hose is clogged
Piston ring is stuck
Blocked impulse channel
The carburettor
Loose or defective fuel hose
leaks fuel Hole in the membrane
Worn needle/needle tip
Control system is binding
Control system set too high
Leaking control system (air
or fuel)
The cover on the carburettor
pump side is loose
Floods when the
Worn needle/needle tip
engine is not
Control system set too high
running Control system is binding
Idling (low speed)
Adjust the L-screw
Does not run at
Leaking inlet hose (rubber)
idling
Loose clamping screws
carburettor
Loose or defective fuel hose
The fuel filter is clogged
The fuel hose is clogged
Tank venting clogged
The throttle valve shaft is inert
Throttle stay is binding
Defective throttle return spring
Bent valve shaft stop
Faulty diffuser jet
Adjust the L-screw
Too high idling
Worn needle/needle tip
speed
Control system set too high
Worn lever arm in the control
system
Leaking diaphragm/
cover plate
Control system is binding
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– English
Idling (low speed) (cont.)
Runs in idle Worn needle/needle tip
with closed L- Leaking diaphragm/cover
screw plate
Control system is binding
Worn lever arm in the control
system
Faulty diffuser jet
Irregular idling The fuel filter is clogged
The fuel hose is clogged
Leaking inlet hose (rubber)
Loose clamping screws
carburettor
Worn throttle valve shaft
The throttle valve screw is loose
The throttle valve is worn
Control system is binding
Leaking control system (air
or fuel)
The control system's centre
knob is worn
Hole in the membrane
Leaking diaphragm/cover
plate
Crankcase leak
The L-screw The fuel hose is clogged
needs constant Control system set too high
adjustment Control system is binding
Leaking control system (air
or fuel)
Leaking diaphragm/
cover plate
Faulty diffuser jet
Crankcase leak
Too much fuel Control system set too high
on Control system is binding
idling Control system damaged
Worn needle/needle tip
Leaking diaphragm/cover
plate
Incorrectly fitted control system