Remove Air Filter; Cleaning The Air Filter; Engine Management - Stihl MS 661 C-M Instruction Manual

Remove air filter

Turn the knob above the rear handle
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in the direction of the arrow and
remove the carburetor box cover
Remover filter
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MS 661 C-M

Cleaning the Air Filter

If there is a noticeable loss of engine
power:
Knock out the filter or blow it clear
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with compressed air from the inside
outwards
If knocking-out or blowing-out does not
suffice, or in the case of stubborn dirt or
stuck filter fabric, the filter must be
subjected to a thorough cleaning.
Always replace a damaged filter.
Thorough filter cleaning
Wash the filter in STIHL special-
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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
Dry all filter parts – do not expose to
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extreme heat
Do not oil the filter
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Reinstall filter
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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.
English
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