11MS 210, MS 230, MS 250
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 Cause Remedy
Engine runs roughly, misfires,
temporary loss of power
Spark plug boot is loose Press boot firmly onto spark plug
and fit new spring if necessary
Spark plug sooted, smeared
with oil
Clean the spark plug or replace if
necessary
Weak spark or no spark 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
Incorrect air gap between ignition
coil and flywheel
Set air gap correctly
Flywheel cracked or has other
damage
Install new flywheel
Crankcase damaged (cracks) Install new crankcase
No ignition spark Check operation of Master Control
lever, ignition module and ignition
lead
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