Jonsered CS2186 Workshop Manual page 13

High speed
Will not run at full
throttle
Low power
Will not "four stroke"
TROUBLE SHOOTING
Adjust H-screw
Blocked air filter
Tank ventilator blocked
Blocked fuel filter
Blocked fuel line
Loose or faulty fuel pipe
Impulse channel leaking
Blocked impulse channel
Cover on carburettor's pump
side is loose
Faulty pump diaphragm
Leaking intake hose (rubber)
Loose carburettor mounting
Control system set too low
Damaged control system
Incorrectly fitted control system
Leaking diaphragm/cover plate
Control system sticking
Blocked muffler
Adjust H-screw
Tank ventilator blocked
Blocked fuel filter
Impulse channel leaking
Blocked impulse channel
Cover on carburettor's pump
side is loose
Faulty pump diaphragm
Blocked air filter
Control system sticking
Leaking control system
(air or fuel)
Control system incorrectly
assembled
Loose diaphragm
Hole in diaphragm
Leaking diaphragm/cover plate
Tank ventilator blocked
Blocked fuel filter
Blocked fuel line
Loose or faulty fuel pipe
Impulse channel leaking
Blocked impulse channel
Cover on carburettor's pump
side is loose
Faulty pump diaphragm
Leaking intake hose (rubber)
Loose carburettor mounting
Control system set too low
Leaking control system (air or
fuel)
Control system incorrectly
assembled
Loose diaphragm
Hole in diaphragm
Leaking diaphragm/cover plate
Acceleration and retardation
Does not accelerate
Engine stops when
throttle released
Too 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
specific chainsaw system. The different procedures are
described in respective sections and are as follows:
1. Pressure testing the carburettor.
2. Pressure testing the crankcase
and cylinder.
3. Pressure testing the decompression
valve.
4. Checking of the chain brake.
Adjust the L-screw
Adjust the H-screw
Blocked air filter
Tank ventilator blocked
Blocked fuel filter
Blocked fuel line
Loose or faulty fuel pipe
Blocked impulse channel
Cover on carburettor's pump
side is loose
Faulty pump diaphragm
Leaking intake hose (rubber)
Loose carburettor mounting
Control system set too low
Incorrectly fitted control system
Control system sticking
Faulty diffuser jet
Blocked muffler
Adjust the L-screw
Adjust the H-screw
Faulty pump diaphragm
Control system set too high
Control system sticking
Faulty diffuser jet
Adjust the L-screw
Adjust the H-screw
Blocked air filter
Faulty pump diaphragm
Faulty diffuser jet
See page 35.
See page 44.
See page 42.
See page 16.
English – 11