Stihl MS 231 User Manual

86 MS 231, MS 231 C, MS 251, MS 251 C
: Pull the fuel hose (1) and fuel
return hose (2) out of the air
guide shroud.
– Remove the air guide shroud.
: Remove the fuel pump (1) with
the fuel hoses and elbow
connector (2), inspect and
replace if necessary, b 12.11.4
– Pull out the shutter , check it and
replace if necessary.
Installing
– Remove the grommet, check and
replace if necessary.
2310RA339 TG
2
1
2310RA340 TG
1
2
2310RA341 TG
1
– Coat outside of grommet with
STIHL press fluid to simplify
installation, b 14
: Fit the grommet (1) in the
hole (arrow) and make sure it is
properly seated.
– Install fuel pump with fuel hoses
and elbow connector, b 12.11.4
: To fit the manifold (2) through the
air guide shroud's opening, wind
a piece of string (1) (about 15 cm
long) around the back of manifold
flange.
2310RA324 TG
1
2310RA325 TG
2
1
– Coat manifold flange with STIHL
press fluid to simplify installation,
b 14
: Place the air guide shroud (1) in
position.
: Push the new fuel hose (2)
through the bore (arrow).
– Use STIHL press fluid to simplify
assembly, b 14
: Push the new fuel hose (3)
through the grommet (4).
2310RA342 TG
3
12
4
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Stihl MS 231 Specifications

General

Power-to-Weight Ratio	2.4 kg/kW
Oilomatic Chain Pitch	3/8" P
Sound Pressure Level	103 dB(A)
Sound Power Level	114 dB(A)
Engine Power	2.0 kW
Weight	4.8 kg
Bar Length	35 cm / 40 cm
Fuel Capacity	390 cc
Chain Oil Capacity	200 ml
Vibration Level Left/Right	3.0/3.0 m/s²