Stihl MS 650

39MS 650, MS 660
: Pull the ends of the string
outward.
The manifold flange is pulled
through the carburetor housing
intake opening without damaging
the manifold.
VA
176RA089
– Check that the flange is properly
seated in the carburetor housing.
: Tighten down the cylinder base
screws in an alternate pattern –
b 3.5
VA
176RA090
: Fit sleeve (1) in manifold.
: Fit the washer (2) on the studs.
– Screw home the decompression
valve and tighten it down firmly –
b 3.5
1
2
178RA050
VA
– Fit the spark plug and tighten it
down firmly – b 3.5
– Install the carburetor – b 12.2.1
– Install the muffler – b 6.1
– Fit the shroud – b 6.2
Reassemble all other parts in the
reverse sequence.
– Remove the piston – b 6.5.1
– Remove the rings from the
piston.
: Use a piece of old piston ring to
scrape the grooves clean.
VA
176RA091
: Install the new piston rings in the
grooves so that the radii at the
ends of the rings face upward.
– Install the piston – b 6.5.2
VA
176RA092
6.6 Piston Rings