Stihl MS 390 User Manual

30 MS 290, MS 310, MS 390
Always check and, if necessary,
repair the fuel system, carburetor,
air filter and ignition system before
looking for faults on the engine.
– Remove the handle housing,
b 9.2
– Remove the shroud, b 6.4
– Remove the oil pump, b 10.4.1
– Remove the muffler, b 6.1
– Remove the flywheel, b 7.3
: Take out the screw (1).
: Remove the ground wires
(arrows).
209RA091
VA
1
: Take out the screws (arrows).
209RA092
VA
– Set piston to bottom dead center.
: Lift cylinder with crankshaft
upwards and off the engine pan.
– Remove cylinder sideways from
the engine housing.
209RA093
VA
– For other operations see b 6.5.1
Install in the reverse sequence.
– Tighten down the engine pan/
cylinder mounting screws in
alternate pattern, b 3.5
– Tighten down the ground wire
fastening screw firmly, b 3.5
If the engine pan is damaged, it
must be replaced before installing
the cylinder. Perform the following
operations to replace the engine
pan:
– Unscrew the collar stud, b 5.4
: Remove the engine pan (1).
Install in the reverse sequence.
– Fit the engine pan in the engine
housing.
209RA100
VA
1
– Coat the thread of the collar stud
with Loctite, b 13.
– Insert and tighten down the collar
stud firmly, b 3.5
– For other operations see b 6.5.1
6.5 Removing and Installing
the Engine

Stihl MS 390 Specifications

General

Brand	Stihl
Model	MS 390
Category	Chainsaw
Language	English