Shroud; Cylinder - Stihl MS 661 Manual

6.4

Shroud

– Remove the filter cover and pull
off the spark plug boot.
2 1
: Unscrew the slotted nut (1) and
remove the shroud (2).
2
1
: Check the grommet (1) and
stud (2), replace if necessary.
Installing
If the stud has been removed:
– Use two locked nuts to screw
home the stud and tighten it down
firmly.
– Coat grommet with STIHL press
fluid and fit its small diameter
over the stud's washer, b 16
28
1
2
: Position the shroud (1) so that
the ignition lead (2) locates in the
guide and the pegs (arrows)
engage the holes.
– Fit the slotted nut and tighten it
down firmly.
– Reassemble all other parts in the
reverse sequence.
6.5

Cylinder

Before removing the cylinder,
decide whether or not the
crankshaft has to be removed as
well.
Cylinder installed
To remove the flywheel and clutch,
the crankshaft has to be blocked by
inserting the locking strip in the
spark plug hole, b 4.2.
Cylinder removed
To remove the flywheel and clutch,
the crankshaft has to be blocked by
resting the piston on the piston
support (special tool).
– Remove the shroud, b 6.4
– Remove the rewind starter,
b 9.2
– Remove the filter base, b 13.3
– Remove the carburetor, b 13.4
– Remove the muffler, b 6.1
– Remove the decompression
valve, b 6.9
– Remove AV element from
handlebar, b 10.4
1
: Remove the washer (1) and
sleeve (2).
– Push out the manifold flange in
the direction of the cylinder.
: Take out the cylinder base
screws through the holes
(arrows).
1
2
: Carefully lift the cylinder (1)
away, guiding the manifold
flange (2) past the tank housing
at the same time.
MS 661, MS 661 C-M
2