Stihl MS 231 Manual page 87

1
: Pull the fuel hose (1) and fuel
return hose (2) out of the air
guide shroud.
– Remove the air guide shroud.
2
: 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
1
– Remove the grommet, check and
replace if necessary.
86
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– Coat outside of grommet with
STIHL press fluid to simplify
installation, b 14
2
: Fit the grommet (1) in the
hole (arrow) and make sure it is
properly seated.
1
– Install fuel pump with fuel hoses
and elbow connector, b 12.11.4
2
1
: 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.
– Coat manifold flange with STIHL
press fluid to simplify installation,
b 14
: Place the air guide shroud (1) in
position.
1
: 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).
MS 231, MS 231 C, MS 251, MS 251 C
3
4
2 1