7BR 500, BR 550, BR 600
4.2 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 injuries!
Condition Cause Remedy
Engine runs roughly, misfires,
temporary low of power
Spark plug boot is loose Press boot firmly onto spark plug,
and fit a new leg spring if necessary
Spark covered in soot, smeared
with oil
Install new spark plug
Wrong air gap between ignition coil
and flywheel
Reset air gap
Flywheel cracked or damaged or
pole shoes have turned blue
Install new flywheel
Ignition timing out of adjustment,
flywheel warped, key in flywheel
sheared
Install new flywheel
Flywheel magnetization weak –
pole shoes have turned blue
Install new flywheel
Engine does not run No spark Check operation of setting lever
and ignition module
No spark Faulty insulation on ignition lead or
short circuit wire. Use ohmmeter to
check ignition lead for break. If
break is detected or resistance is
high, fit new ignition lead
Replace or clean spark plug,
replace damaged parts of ignition
system
RA_452_00_01_02.book Seite 7 Donnerstag, 16. Februar 2012 11:52 11
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