Ignition System - Stihl BT 130 Manual

3.5

Ignition System

Exercise extreme caution while
carrying out maintenance and
repair work on the ignition system.
The high voltages which occur can
cause serious or fatal accidents.
Condition
Engine runs roughly, misfires,
temporary loss of power
BT 130
Cause
Spark plug boot is loose
Spark plug sooted, smeared with oil Clean the spark plug or replace if
Fuel/oil mixture
– too much oil
Wrong air gap between ignition
module and flywheel
Flywheel cracked or
damaged or pole shoes have
turned blue
Ignition timing wrong, flywheel out
of adjustment
– key in flywheel has sheared off
Weak magnetization in flywheel
Irregular spark
Remedy
Press boot firmly onto spark plug
and fit new spring if necessary
necessary.
If sooting keeps recurring, check air
filter
Use correct mixture of fuel and oil
Set air gap correctly
Install new flywheel
Install new flywheel
Install new flywheel
Check operation of slide control /
microswitch contact spring and
ignition module.
Check ignition lead / ignition
module, replace if necessary.
Check operation of spark plug,
clean it and replace if necessary
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