Stihl MS 650

35MS 650, MS 660
: Take out the cylinder base
screws through the holes
(arrows) in the cylinder.
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: Carefully lift the cylinder and, at
the same time, push the manifold
through the tank housing
opening.
Do not use pointed or sharp-edged
tools for this job.
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: Carefully separate the cylinder
gasket from the cylinder base.
– Pull the cylinder off the piston.
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: Loosen the hose clamp (1).
– Pull the manifold (2) off the intake
stub.
– Inspect the cylinder for damage
and scores and replace if
necessary.
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– If a new cylinder has to be
installed, always fit a new
matching piston.
– Before removing the piston,
decide whether or not the
crankshaft has to be removed as
well. The crankshaft has to
blocked to remove the flywheel
and clutch by resting the piston
on the wooden assembly block
with the cylinder removed or
loosened.
– Remove the clutch – b 5.4
– Remove the flywheel – b 7.3.1
: Remove the hookless snap rings
from the piston.
Wear safety glasses to protect your
eyes when working with spring
washers and snap rings.
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: Use the assembly drift (2)
1111 893 4700 to push the piston
pin (1) out of the piston.
If the piston pin is stuck, tap the end
of the drift lightly with a hammer if
necessary.
Hold the piston steady during this
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process to ensure that no jolts are
transmitted to the connecting rod.
– Remove the piston from the
connecting rod and take the
needle cage out of the small end.
– Remove the cylinder gasket from
the crankcase.
– Inspect the piston rings and
replace if necessary – b 6.6