Instruction Manual

Condition Cause Remedy
Engine idles errati‐
cally.
Carburetor is iced up. ► Allow saw to warm up to +10°C.
Engine stops while
idling
Carburetor is iced up. ► Allow saw to warm up to +10°C.
Poor acceleration The chain is over-ten‐
sioned.
► Tension chain properly.
Chain lubrication sys‐
tem is supplying
insufficient chain oil.
► Increase oil feed rate.
Saw chain does not
rotate when throttle is
opened.
The chain brake is
engaged.
► Disengage the chain brake.
The chain is over-ten‐
sioned.
► Tension chain properly.
Bar nose sprocket is
blocked.
► Clean the bar nose sprocket with STIHL resin solvent.
Smoke or burning
smell while cutting.
Chain is not properly
sharpened.
► Sharpen the chain properly.
Insufficient chain oil
in the tank.
► Fill up with chain oil.
Chain lubrication sys‐
tem is supplying
insufficient chain oil.
► Increase oil feed rate.
The chain is over-ten‐
sioned.
► Tension chain properly.
Chainsaw is not
being used properly.
► Have correct use explained, then practice.
18.2 Adjust to standard setting
► Shut off the engine and engage the chain
brake.
0000-GXX-2946-A0
H
L
► Turn the high speed screw H clockwise as far
as it will go.
► Turn the high speed screw H 1/2 of a turn
counterclockwise.
► Turn the low speed screw L clockwise as far
as it will go.
► Turn the low speed screw L 1/4 of a turn coun‐
terclockwise.
18.3 Adjusting Idle Speed
0000-GXX-2938-A0
Engine stops while idling
► Carry out the standard setting.
► Start the engine and disengage the chain
brake.
► Warm up the engine by opening and closing
the throttle for about 1 minute.
► If the engine continues to stop while idling:
Turn the idle speed screw (LA) half a turn
clockwise and restart the engine.
► Turn the idle speed screw (LA) clockwise until
the chain begins to run.
► Turn the idle speed screw (LA) one full turn
counterclockwise.
18 Troubleshooting English
0458-890-0121-B. VA0.A21. 27