Top: Unscrewing the flat head screw
Bottom: Filter cover removed
The air filter’s function is to hold back dust and dirt in the
intake air and thus reduce wear on engine components to
a minimum.
Dirty air filters reduce engine power, increase fuel con-
sumption and make starting more difficult.
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Before removing the filter, clean loose dirt off the filter
cover and the area around it to be sure that no dirt can
get into the engine through the carburetor when the cover
is removed.
Take out the M 4 flat head screw to remove the filter cover
and air filter element .
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The intake air flows to the underside of the filter element. It
follows that only the underside of the element becomes
dirty. It is therefore necessary to remove the element and
turn it over to check its condition.
To clean the element, first knock it out on the palm of your
hand and then wash it in non-flammable cleaning solution
(warm soapy water) and blow out with compressed air if
possible. It is best to carry a spare filter with you at all times.
The element must be replaced immediately if the felt shows
any signs of damage (tears, holes).
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Refit the air filter by reversing the above sequence. When
placing the filter cover in position, make sure the lugs
engage in the recesses in the crankcase. Also make sure
that the choke valve in the filter cover is in good condition.