Stihl MS 311, Manual, Page: 33 / 94

32 MS 311, MS 391
: Use a suitable drift (1) to drive out
the screws (arrow).
Installing
: Use a suitable drift (2) to drive
home the screws (1).
– Reassemble in the reverse
sequence.
4903RA069 TG
1
4903RA071 TG
1
2
6.5 Cylinder / Crankshaft
– Remove the shroud, b 6.4
– Pull off the boot and unscrew the
spark plug,
– Remove the fan housing, b 8.2
– Remove the filter base, b 12.3
– Remove the carburetor, b 12.5
– Remove the manifold, b 12.9
– Remove the muffler, b 6.1
– Remove the decompression
valve, b 6.9
– Remove AV spring from
handlebar, b 9.4
: Take out the screws (arrows).
4903RA072 TG
: Use the lug (arrow) to pry the
cylinder (1) upwards.
– Remove the cylinder with
crankshaft.
: Pull the crankshaft (1) out of the
bearing seats (arrows).
: Carefully pull the crankshaft (1)
with piston out of the cylinder.
– Check the crankshaft and ball
bearings and replace if
necessary,
b 6.6
– Inspect the piston and piston
rings and replace if necessary,
b 6.7, b 6.8
4903RA073 TG
1
4903RA074 TG
1