Ignition System; Ignition Timing; Preseparator; Install New Ignition Module - Stihl MS 261 User Manual

7.

Ignition System

Exercise extreme caution when
troubleshooting and carrying out
maintenance or repair work on the
ignition system. The high voltages
which occur can cause serious or
fatal accidents.
Troubleshooting on the ignition
system should always begin at the
spark plug, b 3.5
– Remove the fan housing, b 8.2
2
The electronic (breakerless) ignition
system basically consists of an
ignition module (1) and flywheel (2).
7.1

Ignition Timing

Ignition timing is fixed and cannot
be adjusted during repair work.
Since there is no mechanical wear
in these systems, ignition timing
cannot get out of adjustment during
operation.
52
7.2

Preseparator

– Remove the fan housing, b
2
1
: Take out the screw (1).
: Check the preseparator (2) and
replace if necessary
– Reassemble in the reverse
sequence.
7.3 Install new ignition
Module
The ignition module accommodates
all the components required to
control ignition timing. There are
two electrical connections on the
coil body:
– the high voltage output (1) for the
ignition lead
– the connector tag (2) for the short
circuit wire
Testing in the workshop is limited to
a spark test. A new ignition module
must be installed if no ignition spark
b 8.2
is obtained (after checking that
wiring and stop switch are in good
condition).
1
– Remove the fan housing, b
– Pull the boot off the spark plug.
– Remove the preseparator, b 7.2
2
: Lift the air guide shroud (1) a little
and pull out the ignition lead (2)
– take care not to distort the air
guide shroud.
1
2
: Pull the ignition lead (1) out of the
guides (arrows).
b 8.2
1
1
MS 261, MS 261 C