Stihl MS 311 Manual

41MS 311, MS 391
: Fit the boot (1) on the spark plug.
: Line up the sleeve (2) – distance
'a' about 3 mm to the edge of the
housing and its open side (arrow)
facing the cylinder.
– Reassemble all other parts in the
reverse sequence.
7.4 Testing the Ignition
Module
To test the ignition module, use
either the ZAT 4 ignition system
tester 5910 850 4503 or the ZAT 3
ignition system tester
5910 850 4520.
The ignition test refers only to a
spark test, not to ignition timing.
4903RA277 TG
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a
Using the ZAT 4 ignition tester
5910 850 4503
– Before starting the test, install a
new spark plug in the cylinder
and tighten it down firmly.
: Connect the spark plug boot to
the input terminal (1) and push
the tester's output terminal (3)
onto the spark plug.
High voltage – risk of electric shock.
– Crank the engine quickly with the
rewind starter and check spark in
the tester’s window (2).
The engine may start and
accelerate during the test.
If a spark is visible, the ignition
system is in order.
– If no spark is visible in the
window (2), check the ignition
system with the aid of the
troubleshooting chart, b 7.8
165RA183 TG
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3
Using the ZAT 3 ignition tester
5910 850 4520
– Before starting the test, install a
new spark plug in the cylinder
and tighten it down firmly.
: Connect spark plug boot to the
terminal (2).
: Attach the ground terminal (1) to
the spark plug.
: Use adjusting knob (4) to set the
spark gap to about 2 mm,
see window (3).
165RA184 TG
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3 4

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