Stihl MS 311 Manual

83MS 311, MS 391
: Inspect and clean the sealing
faces (arrows), b 14
The sealing faces must be in perfect
condition. Always replace
components with damaged sealing
faces.
Installing
: Position the manifold (2) on the
cylinder.
: Fit and tighten down the
screws (1) firmly.
– Install the carburetor carrier,
b 12.8
– Reassemble all other parts in the
reverse sequence.
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12.10 Tank Vent
12.10.1 Testing
If problems occur on the carburetor
or the fuel supply system, also
check and clean the tank vent and
replace it if necessary. Check
function by performing pressure and
vacuum tests on the tank via the fuel
hose.
– Open the fuel tank cap and drain
the fuel tank, b 1.
– Close the tank cap.
– Remove the carburetor, b 12.5
: Push the nipple (1)
0000 855 9200 into the fuel hose
(arrow).
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Vacuum test
: Push the ring (1) to the left and
connect the pump (2)
0000 850 1300 to the
nipple (arrow)
– subject the fuel tank to a
vacuum.
Equalization of pressure takes
place via the tank vent. There must
be no buildup of vacuum in the fuel
tank.
– Clean the area around the tank
vent.
– Always install a new fuel hose.
– If necessary, install a new tank
vent or fuel tank, b 12.10 or
b 12.11.4
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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