Operation Manual

Clean the felt prefilter (1) when there is a
noticeable loss of engine power
After cleaning felt prefilter several times:
•
••
•
Separate the filter components
•
••
•
Knock out the HD filter (2) and blow
it out with compressed air from the
inside outward
*Special equipment
In case of stubborn dirt or sticky filter
fabric:
•
••
•
Wash the filter with STIHL universal
cleaner or in a clean, non-flammable
cleaning solution (e.g. warm soapy
water)
Rinse the filter, from the inside
outward, under a low-pressure
water jet.
Do not use a high-pressure washer.
•
••
•
Dry all parts of the filter.
Do not expose to high
temperatures
•
••
•
Fit the felt prefilter (1) over the
HD filter (2) - note correct installed
position (see ilustration)
•
••
•
Install HD filter (with felt prefilter)
and carburetor box cover.
•
••
•
Check carburetor setting and
readjust if necessary.
The felt prefilter helps protect the HD
filter and thus extends its useful life.
For this reason the felt prefilter should
be replaced at more frequent intervals
than the HD filter.
Always replace a damaged filter.
HD Filter*
171BA014 KN
2
1
145BA030 K
2
1
171BA013 KN
044 37