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MAINTENANCE
30 - Husqvarna
Ignition System
The engine is equipped with an electronic ignition
system. Only the spark plugs require maintenance.
For recommended spark plugs, see Technical 1.
Data.
Remove the ignition cable boot and clean around 2.
the spark plug.
Remove the spark plug with a spark plug socket 3.
wrench.
Check the spark plug. Replace the spark plug 4.
if fouled, the electrodes are burned or if the
insulation is cracked or damaged. Clean the spark
plug with a steel brush if it is to be reused.
Measure the electrode gap with a gapping tool. 5.
The gap should be .030" (0.75 mm). Adjust as
necessary by bending the side electrode.
Reinsert the spark plug, turning by hand to avoid 6.
damaging the threads.
After the spark plug is seated, tighten it using 7.
a spark plug wrench so that the washer is
compressed. A used spark plug should be turned
1
/8 of a turn from the seated position. A new spark
plug should be turned a ¼ turn from the seated
position.
Reconnect the ignition cable.8.
8011-054
Measure the electrode gap
IMPORTANT INFORMATION
Fitting the wrong spark plug type can damage
the engine.
Inadequately tightened spark plugs can
cause overheating and damage the engine.
Tightening the spark plugs too hard can
damage the threads in the cylinder head.
Safety System
The machine is equipped with a safety system that
prevents starting under the following conditions.
The engine can only be started when:
the blades are disengaged.1.
the speed control is in the start position.2.
Make daily inspections to ensure that the safety
system works by attempting to start the engine when
one of the conditions is not met.
If the machine starts when one of these conditions
is not met, turn the machine off and repair the safety
system before using the machine again.
8062-004
Blade engagement control1.
Speed control lever2.
Check the safety system
2
1
WARNING!
Do not operate the mower if the
interlock safety system allows
operating or starting in any unsafe
condition.
Function Check
Check the function of the safety electrical system on a
regular basis.
Engine must stop if blades are engaged without 1.
operator presence levers held down.
Engine must stop if the speed control is taken out 2.
of the start position without holding down operator
presence levers.
Engine must not start unless blades are off and 3.
the speed control is in the start position.