Ignition System - Stihl MS 210 Service Manual

4.4

Ignition System

Warning!
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
MS 210, MS 230, MS 250
Cause
Spark plug boot is loose
Spark plug sooted, smeared
with oil
Weak spark or no spark
Incorrect air gap between ignition
coil and flywheel
Flywheel cracked or has other
damage
Crankcase damaged (cracks)
No ignition spark
Remedy
Press boot firmly onto spark plug
and fit new spring if necessary
Clean the spark plug or replace if
necessary
Faulty insulation on ignition lead or
short circuit wire. Use ohmmeter to
check ignition lead for break. If
break is detected or high resistance
measured, fit a new ignition lead
Set air gap correctly
Install new flywheel
Install new crankcase
Check operation of Master Control
lever, ignition module and ignition
lead
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