Stihl MS 311 Manual page 51

Machine runs trouble-free,
no further action necessary
50
– Short circuit wire chafed?
– Function between contact spring and switch
– Position "F" = no connection
– Position "
– Install new short circuit wire if necessary,
yes
2
Check operation
of switch shaft:
shaft contact:
0
" = connection
b 7.7.2
Powerful
spark?
no
Install new ignition
b 7.3
Engine
runs?
3
yes
no
– Look for fault in fuel system or
carburetor
– Check engine for leaks
– Check position of flywheel on
crankshaft,
b 7.6, b 6.5
MS 311, MS 391