13.9.1 Impulse Hose - Stihl MS 661 Manual

1
: Pull the manifold (1) off the intake
stub (arrow).
– Inspect the intake manifold and
replace it if necessary – even
very minor damage can cause
engine running problems, b 3.7
The sealing faces must be in perfect
condition. Always replace
components with damaged sealing
faces.
Installing
– Install manifold on cylinder,
b 6.5
2 1
– Coat the outside of the manifold
flange with STIHL press fluid,
b 16
: To pull the manifold flange (1)
through the intake opening, wind
a piece of string (2) (about 15 cm
long) around the flange and pass
the ends of the string through the
intake opening.
112
Take care to ensure that the washer
in the manifold is not damaged or
displaced.
1
2
– Press the tank housing against
the manifold and hold it there.
: Grip the ends of the string (2) and
pull the manifold flange (1)
through the opening.
– Remove the string.
1 2
2 3
: Position the manifold flange (1) –
its recesses (arrows) must locate
against the studs (2).
: Fit the washer (3) and push the
sleeve (4) into the manifold
flange (1).
– Install the carburetor, b 13.4
– Reassemble all other parts in the
reverse sequence.

13.9.1 Impulse Hose

A damaged impulse hose can
cause engine running problems.
– Remove the carburetor, b 13.4
– Remove the tank housing,
b 13.11.4
: Pull the impulse hose (1) out of
the tank housing in the direction
of the cylinder.
– Check the impulse hose and
replace if necessary.
4
– Coat tapered outside of new
impulse hose with STIHL press
fluid, b 16
: Push tapered end of impulse
hose (1) through the hole (arrow)
and push it home until it is
properly seated.
1
1
MS 661, MS 661 C-M