Engine Management - Stihl MS 441 C-M Instruction Manual

HD filter
– HD filter – black filter housing with
felt prefilter
If there is a noticeable loss of engine
power:
2
N
Clean felt prefilter (1)
After repeated cleaning of the felt
prefilter
N Separate the parts of the filter from
one another
N Tap HD filter (2) clean and blow
through compressed air from the
inside outwards
MS 441 C-M
In case of stubborn dirt or stuck filter
fabric
N
Wash the filter in STIHL special-
purpose cleaner (special
accessory) or a clean, non-
flammable cleaning liquid (e. g.,
warm soapy water) – rinse the filter
from inside to out under a water jet
– do not use high-pressure cleaners
N Dry all filter parts – do not expose to
1
extreme heat
N Fit the felt prefilter (1) over the HD
filter (2), note installation position
The felt prefilter protects the HD filter
and increases its service life. Thus it
should be replaced at shorter intervals
than the HD filter.
Always replace a damaged filter.
N Reinstall filter

Engine Management

Exhaust emissions are controlled by the
design of the fundamental engine
parameters and components (e.g.
carburation, ignition, timing and valve or
port timing) without the addition of any
major hardware.
2
1
English
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