Cleaning The Air Filter - Stihl MS 231 Instruction Manual

Cleaning the Air Filter

If there is a noticeable loss of engine
power.
Remove the shroud – see "Shroud".
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Removing the air filter
Clean away loose dirt from around
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the filter.
NOTICE
To avoid damaging the filter, do not use
tools for removing and installing the air
filter.
1.
2.
Rotate the air filter a 1/4 turn
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counterclockwise and lift it away in
the direction of the rear handle.
Always replace a damaged filter.
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Cleaning the air filter (fleece filter)
Knock out the filter or blow it clear
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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:
MS 231, MS 231 C, MS 251, MS 251 C
Wash the filter in STIHL special
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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.
Dry the filter components – do not
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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.
–
Install the air filter.
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Cleaning the air filter (HD2 filter)
Knock out the filter.
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Spray outside of filter with STIHL
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special cleaner or soapy water.
Rinse outside of filter under warm
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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.
–
Allow air filter to dry.
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Install the air filter.
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Installing the air filter
1.
2.
Place the air filter in position.
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Push the air filter in the direction of
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the filter housing and turn it
clockwise at the same time until it
engages – the "STIHL" name must
be horizontal.
Install the shroud – see "Shroud".
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English
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