Stihl MS 650

28 MS 650, MS 660
Removing
– Remove the chain sprocket
cover, bar and chain – b 5.1
: Push stud puller (1)
5910 893 0501 over the collar
stud as far as it will go. Use a
178RA043
VA
1
15 mm wrench to unscrew the
collar stud counterclockwise.
Installing
– Before installing, coat thread of
collar stud with Loctite – b 17
– Install and tighten down the collar
stud – b 3.5
Reassemble all other parts in the
reverse sequence.
Always check and, if necessary,
repair the fuel system, carburetor,
air filter and ignition system before
looking for faults on the engine.
– Troubleshooting chart – b 4.6
Only machines with spark
arresting screen in top casing
: Take out the screw (1).
: Remove the spark arresting
screen (2) and clean or replace if
necessary.
All machines
178RA044
2
VA
1
: Take out the screws (arrows).
– Remove the top casing.
– Remove the gasket (if fitted).
VA
176RA006
: Inspect spark arresting screen
(1) (if fitted). If necessary, bend
back the retaining tabs (2) and
pull out the screen.
– Clean or replace the spark
arresting screen if necessary.
178RA045
2
VA
1
: Take out the screws (arrows).
– Remove the bottom casing.
178RA046
VA
5.7 Bar Mounting Studs 6. Engine
6.1 Muffler/Spark Arresting
Screen