17
BR 420
English
:
Remove the main filter (
3
)
from the
cover and inspect it –
if it is dirty or damaged, fit a new
one.
:
Always install a new prefilter when
you change the main filter.
:
Take the prefilter (
4
) out of the filter
cover.
:
If the prefilter is wet, dry it – then
knock it out on the palm of your
hand or blow out with compressed
air.
:
Always replace a damaged prefilter.
:
Clean loose dirt from the filter cover
and filter chamber.
:
Install the main filter and prefilter
elements in the filter cover.
:
Fit the cover on the filter base (
5
)
and tighten it down firmly.
The carburetor comes from the factory
with a standard setting.
This setting provides an optimum
fuel-air mixture under most operating
conditions.
With this carburetor it is only possible to
correct the adjustment of the high speed
and low speed screws within fine limits.
373BA018 KN
3
4
5
Adjusting the Carburetor
