Troubleshooting
The various faults that can affect a chainsaw are divided into four groups. In each group the likely symp-
toms are given on the left and possible causes are listed on the right. The most likely faults are given first,
and so on.
Starting
Idling (low rpm) (cont.)
Difficulty starting Adjust L screw
Air filter blocked
Choke not working
Worn choke pivot
Worn choke valve
Fuel filter blocked
Idles when L
screw closed
Worn needle valve
Leaking control diaphragm/
cover plate
Needle valve assembly sticking
Worn needle valve lever
Faulty diffuser jet
Fuel line blocked
Piston ring seized
Blocked impulse channel
Idling uneven
Fuel filter blocked
Fuel line blocked
Leaking air intake hose (rubber)
Loose carburettor mounting
bolts
Carburettor leak- Loose or faulty fuel pipe
ing fuel
Hole in diaphragm
Worn needle valve
Worn throttle valve pivot
Loose throttle valve screw
Worn throttle valve
Needle valve assembly stick-
ing
Needle valve assembly sticking
Needle valve set too high
Leak in metering system (air
or fuel)
Loose cover on carburettor
pump side
Leak in metering system (air
or fuel)
Metering system centre knob
is worn
Hole in diaphragm
Leaking control diaphragm/
cover plate
Flooding when
engine not run-
ning
Worn needle valve
Needle valve set too high
Needle valve assembly sticking
Crankcase leaking
Idling (low rpm)
L screw requires Fuel line blocked
Will not idle
Adjust L screw
constant
Needle valve set too high
Leaking air intake hose
adjustment
Needle valve assembly sticking
Leak in metering system (air
or fuel)
Leaking control diaphragm/
cover plate
(rubber)
Loose carburettor mounting
bolts
Loose or faulty fuel hose
Fuel filter blocked
Faulty diffuser jets
Fuel line blocked
Crankcase leaking
Fuel tank vent blocked
Throttle valve pivot stiff
Throttle pushrod sticking
Defective throttle return spring
Bent throttle stop
Too much fuel at Needle valve set too high
idling
Needle valve assembly stick-
ing
Metering system damaged
Worn needle valve
Leaking control diaphragm/
cover plate
Faulty diffuser jet
Idling too rich
Adjust L screw
Worn needle valve
Needle valve set too high
Worn needle valve lever
Leaking control diaphragm/
cover plate
Metering system incorrectly
assembled
Needle valve assembly
sticking
English – 11
| Categories | Chainsaw Manuals, Husqvarna Chainsaw Manuals |
|---|---|
| Tags | Husqvarna 340, Husqvarna 345, Husqvarna 346XP, Husqvarna 350, Husqvarna 351, Husqvarna 353 |
| Model Year | 2003, 2004, 2005, 2006 |
| Download File |
|
| Document Type | Operator's Manual |
| Language | English |
| Product Brand | Husqvarna, Chainsaw |
| Document File Type | |
| Publisher | husqvarna.com |
| Wikipedia's Page | Husqvarna |
| Copyright | Attribution Non-commercial |
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