Cleaning The Air Filter; Engine Management - Stihl MS 171 Instruction Manual

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Cleaning the Air Filter

Dirty air filters reduce engine power,
increase fuel consumption and make
starting more difficult.
If there is a noticeable loss of engine
power
N Squeeze the throttle trigger and
move the Master Control lever to
cold start l .
N Slide the lock to the rear.
N Remove the shroud upwards to the
rear.
N Always replace damaged filters.
N Clean away loose dirt from around
the filter.
38
N Push the two locking tabs upwards,
tilt the air filter towards the rear
handle and remove.
To avoid damaging the filter. do
not use tools for removing and
installing the air filter.
N Blow out the filter with compressed
air from the clean air side.
If the filter fabric is caked with dirt or no
compressed air is available:
N Wash the filter in a clean, non-
flammable solution (e.g. warm
soapy water) and then dry.
N Reinstall the air filter.
N Refit the shroud and secure it with
the lock.

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.
MS 171, MS 181, MS 181 C, MS 211, MS 211 C