Stihl MS 391

19MS 311, MS 391
: Screw the clutch (1) on to the
crankshaft stub and tighten down
the hexagon (arrow) firmly – left-
hand thread.
– Remove the locking strip from the
cylinder.
– Reassemble all other parts in the
reverse sequence.
4903RA014 TG
1
4.1 Clutch Drum
– Remove and install the clutch
drum, see instruction manual.
: Pull off the needle cage (1).
– Clean the needle cage and
crankshaft stub, b 14
– Lubricate the needle cage and
crankshaft stub, b 14
– Inspect the clutch drum (1) for
signs of wear.
If there are signs of serious wear on
the inside diameter of the clutch
drum (1), check the remaining wall
thickness. If it is less than about
80% of the original thickness, install
a new clutch drum.
– Install the clutch drum.
4903RA015 TG
1
!
80%
100%
165RA029 TG
1