Trouble Shooting - Husqvarna 362XP Workshop Manual

High rpm
Adjust H-screw
Will not run at full
Blocked air filter
throttle
Blocked fuel tank ventilator
Blocked fuel filter
Fuel line blocked
Loose or damaged fuel line
Impulse channel leaking
Impulse channel blocked
Loose cover on carburettor
pump side
Faulty pump diaphragm
Leaking air intake (rubber)
Loose carburettor mounting bolts
Needle valve set too low
Metering system damaged
Metering system incorrectly
assembled
Leaking control diaphragm/cover
plate
Needle valve assembly sticking
Blocked silencer
Adjust H-screw
Low power
Blocked fuel tank ventilator
Blocked fuel filter
Impulse channel leaking
Impulse channel blocked
Loose cover on carburettor pump
side
Faulty pump diaphragm
Blocked air filter
Needle valve assembly sticking
Leak in metering system (air or fuel)
Metering system incorrectly
assembled
Loose diaphragm
Hole in diaphragm
Leaking control diaphragm/cover
plate
Blocked fuel tank ventilator
Will not "four-stroke"
Blocked fuel filter
Fuel line blocked
Loose or damaged fuel line
Impulse channel leaking
Impulse channel blocked
Loose cover on carburettor pump
side
Faulty pump diaphragm
Leaking air intake (rubber)
Loose carburettor mounting bolts
Needle valve set too low
Leak in metering system (air or fuel)
Metering unit incorrectly
assembled
Loose diaphragm
Hole in diaphragm
Leaking control diaphragm/cover
plate

TROUBLE SHOOTING

Acceleration and retardation
Does not accelerate
Adjust L-screw
Motor stalls when throttle
released
Over rich acceleration
Trouble shooting methods
In addition to faults given in the above schematic, trouble
shooting can be carried out on a specific component or sub-
system of the chainsaw. The different testing procedures are
described in respective sections and are as follows:
1. Pressure testing the carburettor.
2. Pressure testing the crankcase and cylinder. See page 41.
3. Pressure testing the decompression valve. See page 39.
4. Checking operation of the chain brake.
Adjust H-screw
Blocked air filter
Blocked fuel tank ventilator
Blocked fuel filter
Fuel line blocked
Loose or damaged fuel line
Impulse channel blocked
Loose cover on carburettor
pump side
Faulty pump diaphragm
Leaking air intake (rubber)
Loose carburettor mounting
bolts
Needle valve set too low
Metering system incorrectly
assembled
Needle valve assembly sticking
Faulty diffuser jet
Blocked silencer
Adjust L-screw
Adjust H-screw
Faulty pump diaphragm
Needle valve set too high
Needle valve assembly sticking
Faulty diffuser jet
Adjust L-screw
Adjust H-screw
Blocked air filter
Faulty pump diaphragm
Faulty diffuser jet
See page 31.
See page 13.
English – 9