Husqvarna 545 Workshop Manual page 65

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 first, etc. See separate instruction for Autotune troubleshooting.
Starting
ifficult to start Air filter blocked
Choke does not work
Worn choke a le
Worn choke valve
locked fuel filter
locked fuel line
Piston ring is stuck
locked impulse channel
The carburettor Loose or faulty fuel pipe
leaks fuel ole in diaphragm
Worn needle needle tip
Control system sticking
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 sticking
Idling (low speed)
Leaking inlet hose (rubber)
oes not idle
Loose carburettor mounting
Loose or faulty fuel pipe
locked fuel filter
locked fuel line
Tank ventilator blocked
The throttle valve shaft is inert
Throttle stay is binding
efective throttle return spring
ent valve a le stop
Faulty diffuser et
Worn needle needle tip
Too rich idling
Worn lever arm in the control
system
Leaking diaphragm cover plate
Idling (low speed) (continued)
Worn needle needle tip
Leaking diaphragm cover plate
Worn lever arm in the control
system
Faulty diffuser et
Uneven idling locked fuel filter
locked fuel line
Leaking inlet hose (rubber)
Loose carburettor mounting
Worn throttle valve a le
Loose throttle valve screw
Worn throttle valve
Leaking control system
(air or fuel)
The control system s centre
knob is worn
ole in diaphragm
Leaking diaphragm
cover plate
Leaking crankcase
locked fuel line
Leaking control system
(air or fuel)
Leaking diaphragm cover plate
Faulty diffuser et
Leaking crankcase
Too much fuel at Worn needle needle tip
idle speed Leaking diaphragm
cover plate
Troubleshooting
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