Troubleshooting
8.1
Troubleshooting
The various faults that can affect a chainsaw are divided into four groups. In each group the likely
symptoms 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
Idling uneven
Fuel filter blocked
Blocked impulse channel
Fuel line blocked
Leaking air intake hose (rubber)
Loose carburettor mounting
bolts
Carburettor
leaking fuel
Loose or faulty fuel pipe
Hole in diaphragm
Worn needle valve
Worn throttle valve pivot
Loose throttle valve screw
Worn throttle valve
Needle valve assembly sticking
Leak in metering system (air
or fuel)
Needle valve assembly sticking
Needle valve set too high
Leak in metering system (air
or fuel)
Loose cover on carburettor
pump side
Metering system centre knob
is worn
Flooding when
engine not
running
Worn needle valve
Needle valve set too high
Needle valve assembly sticking
Hole in diaphragm
Leaking control diaphragm/cover
plate
Crankcase leaking
L screw requires Fuel line blocked
Idling (low rpm)
constant adjust-
ment
Needle valve set too high
Needle valve assembly sticking
Leak in metering system (air
or fuel)
Will not idle
Adjust L screw
Leaking air intake hose (rubber)
Loose carburettor mounting
bolts
Loose or faulty fuel hose
Fuel filter blocked
Leaking control diaphragm/cover
plate
Faulty diffuser jets
Crankcase leaking
Fuel line blocked
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 sticking
Metering system damaged
Worn needle valve
Leaking control diaphragm/cover
plate
Faulty diffuser jet
Metering system incorrectly
assembled
Idling too rich
Adjust L screw
Worn needle valve
Needle valve set too high
Worn needle valve lever
Leaking control diaphragm/cover
plate
Needle valve assembly sticking
54
– English
| Categories | Chainsaw Manuals, Husqvarna Chainsaw Manuals |
|---|---|
| Tags | Husqvarna 435, Husqvarna 435e, Husqvarna 440e |
| Model Year | 2003, 2004, 2005, 2006, 2007, 2008 |
| 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 |
(3 votes, average: 5 out of 5)
Lawn and Garden readers have rated 2003-2008 Husqvarna 435 435e 440e Chainsaw Workshop Manual 5.0 out of 5.0 based on 3 product reviews. Excellent, just what was needed