Instruction Manual
MS 271, MS 271 C, MS 291, MS 291 C
English
43
The air filter system can be adapted to
suit different operating conditions by
installing different filters. Changing the
filter is quick and simple.
Fleece filter
N Fleece filter for normal operating
conditions and dry work areas.
HD2 filter
N HD2 filter (black filter frame, pleated
filter material) for extreme wintry
conditions (e.g. powder or drifting
snow) or very dusty work areas.
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
To avoid damaging the filter, do not use
tools for removing and installing the air
filter.
N Rotate the air filter a 1/4 turn
counterclockwise and lift it away in
the direction of the rear handle.
N Always replace a damaged filter.
Cleaning the air filter (fleece filter)
N Knock out the filter or blow it clear
with compressed air from the inside
outwards.
If knocking it out or blowing it clear is not
sufficient to remove stubborn dirt, or if
the filter fabric is sticky, perform the
following steps:
N Wash the filter in STIHL special
cleaner (special accessory) or a
clean, non-flammable solution (e.g.
warm soapy water). Rinse the filter
from the inside outwards under a jet
of water – do not use a pressure
washer.
N Dry the filter components – do not
expose to high temperatures.
NOTICE
High temperatures and oil can damage
the air filter. Filter efficiency can
deteriorate as a result.
– Allow air filter to dry without using
any external source of heat.
– Do not impregnate the filter with oil.
N Install the air filter.
Cleaning the air filter (HD2 filter)
N Knock out the filter.
N Spray outside of filter with STIHL
special cleaner or soapy water.
N Rinse outside of filter under warm
running water.
NOTICE
High temperatures and oil can damage
the air filter. Filter efficiency can
deteriorate as a result.
– Allow air filter to dry without using
any external source of heat.
– Do not impregnate the filter with oil.
N Allow air filter to dry.
N Install the air filter.
Air Filter System
5902BA009 KN
5902BA008 KN
Cleaning the Air Filter
1.
2710BA000 KN
2.