Short Circuit Wire; Testing; Removing And Installing - Stihl SR 430 Manual

5.6

Short Circuit Wire

5.6.1

Testing

1
If the spark plug, ignition lead and
spark plug boot are in order, check
the short circuit wire and stop
switch, b 5.6.2.
– Remove the shroud, b 4.4
: Disconnect the short circuit
wire (1).
– Connect the ohmmeter to
ground (arrow) and the short
circuit wire (1).
– Move the setting lever to "
hold it in that position.
The resistance measured must be
about 0 Ω. If it is much higher, the
reason may be the stop switch or
the wire. If damage is found, replace
the complete throttle cable,
b 5.6.2.
– Move the setting lever to " F".
The resistance measured must be
infinitely high. If not, install a new
throttle cable, b 5.6.2.
SR 430, SR 450
To locate the fault, test the wires for
continuity and check insulation for
damage. If the wires are in order,
check operation of stop switch,
b 5.7
If no fault can be found, check the
ignition system with the aid of the
troubleshooting chart, b 5.7
– Check ground wire for continuity.
– Reassemble in the reverse
sequence.
5.6.2

Removing and Installing

The short circuit wire (black),
ground wire (blue) and throttle cable
are in a protective tube and form an
assembly.
If any part is damaged, the entire
throttle cable must be replaced.
– Remove the shroud, b 4.4
– Remove the filter housing, b 9.4
0
" and
1
: Pull off the spark plug boot (1)
vertically.
2
1
: Disconnect the short circuit
wire (1) and ground wire (2).
1
: Pull the wiring harness (1) out of
the guides (arrows).
1
: Pull the fuel hoses (1) out of the
guides (arrows).
1
35