Husqvarna T540 XP - Page 64

64 – English
Irregular idling
Too much fuel
on idling
Starting
Idling (low speed)
Idling (low speed) (cont.)
Leaking inlet hose (rubber)
Loose clamping screws
carburettor
Loose or defective fuel hose
The fuel lter is clogged
The fuel line is clogged
Tank venting clogged
The throttle valve shaft is slug-
gish
Throttle stay is jamming
Defective throttle return spring
Bent valve shaft stop
Faulty diffuser jet
Worn lever arm in the control
system
Leaking control diaphragm/
cover plate
Does not run
when idling
Too high idling
speed
8.1 Troubleshooting
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 rst, etc.
See separate instruction for AutoTune troubleshooting.
Starting
difculties
The carburettor
leaks fuel
Floods when the
engine is not
running
Clogged air lter
Choke does not work
Worn choke shaft
Worn choke valve
The fuel lter is clogged
The fuel line is clogged
Piston ring is stuck
Blocked impulse channel
Loose or defective fuel hose
Hole in the membrane
Control system is jamming
Control system set too high
Leaking control system (air or
fuel)
The cover on the carburettor
pump side is loose
Control system set too high
Control system is jamming
The fuel lter is clogged
The fuel line 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
Leaking control system (air
or fuel)
The control system’s centre
knob is worn
Hole in the membrane
Leaking control diaphragm/
cover plate
Crankcase leak
Leaking control diaphragm/
cover plate
Troubleshooting