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The air filter system can be adapted to
suit different operating conditions by
simply installing a choice of filters.
Standard wire mesh filter (1) (green) for
normal operating conditions and winter
operation.
HD filter (2) (black) for dry and very
dusty work areas.
Note:
STIHL standard and HD filters have a
long wear life when used in a
dry condition. Therefore, always use
and keep STIHL filters dry.
Undo the knob above the rear
handle in direction of arrow and
remove the carburetor box cover.
Pull off the filter.
When there is a noticeable loss of
engine power
Knock the filter out on the palm of
your hand or blow it out with com-
pressed air from the inside outward.
In case of stubborn dirt or sticky filter
fabric:
Wash the filter in a fresh,
non-flammable solution (e.g. warm
soapy water) and then dry.
Do not impregnate standard wire
mesh filter with oil.
Always replace a damaged filter
element.
Refit the filter.
TO
P
O
ben
H
AU
T
2
137BA012 KN
145BA028 K
Air Filter System
Remove the Filter Cleaning Standard Filter
137BA013 KN
1
137BA011 KN
137BA008 KN
Dirty air filters reduce engine power,
increase fuel consumption and make
starting more difficult.
066 35
37


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