Short Circuit Wire; Testing; Removing And Installing - Stihl MS 261 User Manual

Make sure the key (arrow) engages
the slot in the crankshaft.
– Set the air gap between the
ignition module and flywheel,
b 7.3
– Reassemble all other parts in the
reverse sequence.
7.7

Short Circuit Wire

The ground and short circuit wires
are combined in a wiring harness.
7.7.1

Testing

2
1
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
: Pull the short circuit wire (1) out
of the guide (arrow) and take it
away.
58
– 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
– Set the Master Control lever to
"F".
The resistance measured must be
infinitely high. If not, replace the
wiring harness, b 7.7.
Perform the contact and continuity
test on the ground wire too.
If the ground wire is damaged, the
complete wiring harness has to be
replaced.
– 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.
7.7.2

Removing and Installing

– Remove the shroud, b 6.4
– Pull the boot off the spark plug.
– Remove the fan housing, b 8.2
– Remove the choke rod,
b 10.3.3
2
b 7.7.
: Lift the air guide shroud (1) a little
and pull out the ignition lead (2)
– take care not to distort the air
guide shroud.
: Pull the ignition lead (1) out of the
guide (arrows).
: Pull the short circuit wire out of
the guide (arrow) and disconnect
the terminal (1).
: Take out the screw and remove
the ground wire (2).
1
1
2
1
MS 261, MS 261 C