Stihl MS 311 Manual page 48

Make sure the lug (arrow) locks the
contact spring in position.
1
: Lift the contact spring (1) and
push it over the switch shaft.
: Check operation.
– short circuit wire's connector
must touch the contact spring
0
(arrow) in position "
– Reassemble all other parts in the
reverse sequence.
MS 311, MS 391
".
47