Stihl MS 390 User Manual

47MS 290, MS 310, MS 390
Check
#"/$ function on
Master Control lever/
switch shaft
or separate stop switch
no
Install new
ignition module
yes
no
Look for fault in fuel system
or carburetor,
check engine for leaks,
check position of flywheel on
crankshaft
yes
Check operation of
Master Control lever/switch shaft
or separate stop switch
– Short circuit wire chafed?
– Contact gap (contact springs)
If necessary, install new ignition lead
and/or contact springs
Re-connect short circuit wire
2
3
Powerful
spark?
Engine
runs

Stihl MS 390 Specifications

General

Engine Displacement	64.1 cc
Chain Pitch	3/8"
Weight	6.2 kg
Guide Bar Lengths	40 to 50 cm
Fuel Capacity	0.68 l (23.0 oz)