Instruction Manual

► Unscrew the filter cover lock (1) counterclock‐
wise.
► Remove the filter cover (2).
► Clean away loose dirt from around the filter.
296BA027 KN
3
4
► Take the air filter (3) out of the filter hous‐
ing (4).
8.3.1 Cleaning the air filter
► Carefully knock the filter out on the palm of
your hand or blow it clear with compressed air
from the inside outwards.
In case of stubborn dirt or sticky filter fabric
► Wash the air filter in STIHL special cleaner
(special accessory) or a clean, non-flammable
solution (e.g. warm soapy water). Rinse the fil‐
ter from the inside outwards under a jet of
water – do not use a pressure washer.
► Dry the filter – do not expose to high tempera‐
tures.
8.3.2 Place the filter in position.
► Install the filter element in the filter housing.
► Fit the filter cover and tighten the filter cover
lock clockwise.
9 Adjusting the Carburetor
The carburetor has been set at the factory to pro‐
vide an optimum fuel-air mixture under most
operating conditions.
9.1 Adjusting Idle Speed
0000-GXX-7919-A0
9.1.1 Engine stops while idling
► Turn the idle speed screw (LA) clockwise until
the engine runs smoothly.
10 Spark Plug
► If the engine is down on power, difficult to start
or runs poorly at idle speed, first check the
spark plug.
► Fit a new spark plug after about 100 operating
hours – or sooner if the electrodes are badly
eroded. Install only suppressed spark plugs of
the type approved by STIHL – see "Specifica‐
tions".
10.1 Removing the spark plug
1
296BA015 KN
► Pull off the spark plug boot (1).
► Unscrew the spark plug.
10.2 Checking the Spark Plug
000BA039 KN
A
► Clean dirty spark plug.
► Check electrode gap (A) and readjust if neces‐
sary – see "Specifications".
► Rectify the problems which have caused foul‐
ing of the spark plug.
Possible causes are:
–
Too much oil in fuel mix.
–
Dirty air filter.
–
Unfavorable running conditions.
9 Adjusting the Carburetor English
0458-296-8321-F 15