Stihl MS 311 Manual

27MS 311, MS 391
6. Engine
6.1 Muffler
Always check and, if necessary,
repair the fuel system, carburetor,
air filter and ignition system before
looking for faults on the engine.
– Troubleshooting, b 3.7
– Remove the shroud, b 6.4
Before removing the muffler, set the
piston to top dead center to ensure
that no dirt falls into the cylinder.
: Pry the plug (1) out of the drive
tube.
– Do not refit old plugs, always fit
new ones.
: Take out the screws (1).
: Remove the muffler (2).
4903RA056 TG
1 1
4903RA057 TG
2
11
: Remove the exhaust gasket (1).
– Remove and install the spark
arresting screen – see instruction
manual.
Installing
– Hold the machine upright.
: Inspect and clean the sealing
faces (arrows) and remove any
gasket residue.
Always replace components with
damaged sealing faces.
0001RA076 TG
1
0001RA079 TG
– Position the exhaust gasket (1)
so that the warts (arrows) point
towards the cylinder.
: Fit the exhaust gasket (1) and
line it up with the warts (arrows)
against the cylinder exhaust port.
: Carefully place the muffler (1) in
position.
: Check the position of the gasket
and fit the screws (2).
– Fit and tighten down the screws
(2) firmly.
– Fit new plugs.
0001RA080 TG
1
0001RA081 TG
2
1
2

Stihl MS 311 Specifications

General

Oil tank capacity	0.348 L
Fuel tank capacity	0.6 L
Power source	Gasoline

Weight and Dimensions

Weight	6200 g