TROUBLE SHOOTING
High rpm
Acceleration and retardation
Will not run at full
throttle
Adjust H-screw
Blocked air filter
Does not accelerate
Adjust L-screw
Adjust H-screw
Blocked fuel tankbreather
Blocked fuel filter
Fuel line blocked
Blocked air filter
Blocked fuel tankbreather
Blocked fuel filter
Loose or damaged fuel line
Impulse channel leaking
Impulse channel blocked
Loose cover on carburettor
pump side
Fuel line blocked
Loose or damaged fuel line
Impulse channel blocked
Loose cover on carburettor
pump side
Faulty pump diaphragm
Leaking manifold
Faulty pump diaphragm
Leaking manifold
Loose carburettor mounting
Control system set too low
Control system damaged
Control system incorrectly
assembled
Leaking control diaphragm/cover
Control system sticking
Blocked silencer
Loose carburettor mounting
Throttle set too low
Control system incorrectly
assembled
Control system sticking
Faulty diffuser jet
Blocked silencer
Motor stalls when
throttle released
Adjust L-screw
Adjust H-screw
Low power
Adjust H-screw
Blocked fuel tankbreather
Blocked fuel filter
Impulse channel leaking
Impulse channel blocked
Loose cover on carburettor
pump side
Faulty pump diaphragm
Blocked air filter
Control system sticking
Leak in throttle system (air or
fuel)
Faulty pump diaphragm
Control system set too high
Control system sticking
Faulty diffuser jet
Over rich accelera-
tion
Adjust L-screw
Adjust H-screw
Blocked air filter
Faulty pump diaphragm
Faulty diffuser jet
Control system incorrectly
assembled
Loose diaphragm
Hole in diaphragm
Trouble shooting methods
Leaking control diaphragm/cover
Blocked fuel tank breather
Blocked fuel filter
In addition to faults given in the above schematic,
trouble shooting can be carried out on a specific
component or sub-system of the chain saw. The
different testing procedures are described in
respective sections and are as follows:
Will not
”four-stroke”
Fuel line blocked
Loose or damaged fuel line
Impulse channel leaking
Impulse channel blocked
Loose cover on carburettor
pump side
Faulty pump diaphragm
Leaking manifold
Loose carburettor mounting
bolts
Control system set too low
Leak in throttle system (air or
fuel)
Control system incorrectly
assembled
1.
2.
3.
4.
Pressure testing the carburettor.
See page 100.
Pressure testing the crankcase and cylinder.
See page 114.
Pressure testing the decompression valve.
See page 114.
Checking the operation of the chain brake.
See page 47.
Loose diaphragm
Hole in diaphragm
Leaking control diaphragm/cover
English –
41
| Categories | Chainsaw Manuals, Husqvarna Chainsaw Manuals |
|---|---|
| Tags | Husqvarna 242XP, Husqvarna 246, Husqvarna 254XP, Husqvarna 257, Husqvarna 262XP, Husqvarna 268, Husqvarna 268K, Husqvarna 272K, Husqvarna 272S, Husqvarna 272XP, Husqvarna 281XP, Husqvarna 288XP, Husqvarna 3120XP, Husqvarna 36, Husqvarna 394XP, Husqvarna 40, Husqvarna 41, Husqvarna 42, Husqvarna 45, Husqvarna 51, Husqvarna 55, Husqvarna 61 |
| Model Year | 1997, 1998, 1999, 2000, 2001, 2002 |
| 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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