Stihl MS 311 Manual

44 MS 311, MS 391
7.7 Short Circuit Wire
7.7.1 Testing
If the spark plug, ignition lead and
spark plug boot are in order, check
the short circuit wire.
– Remove the fan housing, b 8.2
: Disconnect the short circuit
wire (1).
– Connect the ohmmeter to
ground (2) and the short circuit
wire (1).
– Set the Master Control lever to
"
0".
The resistance measured must be
about 0 Ω. If it is much higher, the
reason is a break and the wiring
harness has to be replaced, b 7.7.
– Set the Master Control lever to
"F".
The resistance measured must be
infinitely high. If not, fit a new short
circuit wire, b 7.7.
Perform the contact and continuity
test on the ground wire too.
– If no fault can be found, check the
ignition system with the aid of the
troubleshooting chart, b 7.8.
– Reassemble in the reverse
sequence.
1
2
4903RA263 TG
7.7.2 Removing and Installing
– Pull the boot off the spark plug.
– Remove the shroud, b 6.4
– Remove the fan housing, b 8.2
– Disconnect the choke rod,
b 10.2.1
– Remove the contact spring,
b 7.7.4
The ground and short circuit wires
are combined in a wiring harness.
: Pull the ignition lead (3) out of the
guide (arrows).
: Remove the connector (1).
: Take out the screw and remove
the ground wire (2).
: Pull the wiring harness (1) out of
the guides (arrows).
4903RA099 TG
1
2
3
4903RA100 TG
1
: Pull the short circuit wire (1) out
of the guides (arrows).
– Pull the ring terminal (2) off the
pin.
: Lift the ring terminal (1) a little
and pull it off the pin (2) .
– Remove the filter base, b 12.3
: Pull the short circuit wire (1) out
of the guides (arrows).
4903RA101 TG
1
2
4903RA102 TG
2
1
4903RA264 TG
1

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