Fuel System; Filter Base - Stihl MS 231 Manual

12.

Fuel System

12.1 Air Filter
Dirty air filters reduce engine power,
increase fuel consumption and
make starting more difficult. The air
filter should be checked when there
is a noticeable loss of engine power.
– See also Troubleshooting,
b 3.6, b 3.7
– Remove the shroud, b 6.4
: Rotate the air filter (1)
counterclockwise and lift it away.
– Check the air filter and clean or
replace if necessary
– see instruction manual.
– Reassemble in the reverse
sequence.
MS 231, MS 231 C, MS 251, MS 251 C
All manuals and user guides at all-guides.com
12.2 Baffle
– Remove the air filter, b 12.1
1
1 : Unscrew the nuts (arrows).
: Remove the baffle (1).
– Check the baffle and replace it if
necessary
– Reassemble in the reverse
sequence.
12.3

Filter Base

– Remove the air filter, b 12.1
– Remove the choke rod,
b 10.3.3
– Remove the baffle, b 12.2
: Pry the filter base (1) out of the
buffer (2).
1
: Pull the filter base (1) off the
studs (arrows).
1
: Pull the filter base (1) out of the
buffer (2).
2
1
: Pull the short circuit wire (1) and
ground wire (2) out of the
guides (arrows).
– Remove the contact spring,
b 7.7.4
2
– Remove the switch shaft, b 10.1
– Remove the filter base.
2
1
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