Fuel System; Air Filter - Stihl MS 341 Shop Manual

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: Replace the sealing ring (1).
Always use a new sealing ring.
– Lubricate the worm with grease
before installing – b 16.
Reassemble in the reverse
sequence.
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11.3.2 Servicing
5
4 7 6 7 3 2
Always check the suction hose and
pickup body before disassembling
the oil pump.
– Remove the oil pump – b 11.3.1
: Use a 2 mm drift to drive out the
spring pin (1).
: Pull out the control bolt (2).
: Remove the O-rings (3).
: Pry out the plug (4).
: Remove the pump piston (5) with
spring (6) and washers (7).
– Clean all parts and examine for
serviceability – b 16.
Always install new O-rings.
– Lubricate the pump piston and
worm with grease before
installing – b 16.
Reassemble in the reverse
sequence.
12.

Fuel System

12.1

Air Filter

Dirty air filters reduce engine power,
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increase fuel consumption and
make starting more difficult.
The air filter should be cleaned
when there is a noticeable loss of
engine power.
– Remove the carburetor box
cover.
– Remove all loose dirt from
around the filter.
: Remove the air filter (1).
– Knock out the filter or blow it clear
with compressed air from the
inside outwards.
– In case of stubborn dirt, wash all
parts of the filter in STIHL
universal cleaner or a fresh, non-
flammable cleaning solution (e.g.
warm soapy water) and allow to
dry.
Do not clean fleece (non-woven)
filters with a brush. Replace
damaged filters.
MS 341, MS 361, MS 361 C
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