MS 251, MS 251 C
English
43
If there is a noticeable loss of engine
power
N Remove the shroud – see "Shroud"
Removing the air filter
N Clean away loose dirt from around
the filter
NOTICE
Do not use tools to remove and install
the air filter – the air filter could be
damaged in the process.
N Turn air filter 1/4 turn
counterclockwise and remove in the
direction of the rear handle
N Always replace a damaged filter
Cleaning the air filter
N Knock out the filter or blow it clear
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.
Thorough filter cleaning
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
extreme heat
N Do not oil the filter
N Reinstall filter
Installing the air filter
N Fit air filter
N Press the air filter in the direction of
the filter housing and
simultaneously turn it clockwise
until the air filter engages – the
"STIHL" logo must be horizontal
N Fit the shroud – see "Shroud"
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.
Cleaning the Air Filter
Engine Management
To Next Page
Loading...
