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Maintenance
Removing the Spark Plug
1.
Park machine on level ground, move the motion
control levers out to engage the parking brake,
disengage the blade control switch, stop engine,
and remove key. Wait for all moving parts to stop
before leaving the operator's position.
2.
Disconnect the wire from the spark plug.
Due to the deep recess around the spark plug,
blowing out the cavity with compressed air is
usually the most effective method for cleaning.
The spark plug is most accessible when the blower
housing is removed for cleaning.
Installing the Spark Plug–Exmark
Engine
1.
Install the spark plug. Make sure that the air gap
is set correctly.
2.
Tighten the spark plug to 15 ft-lb (20 N-m).
Figure 48
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3.
Push the wire onto the spark plug.
Checking the Spark Plug
1.
Inspect the spark plug
Note: If you see light brown or gray on the
insulator, the engine is operating properly. A
black coating on the insulator usually means the
air cleaner is dirty.
Important: Do Not clean the spark plug(s).
Always replace the spark plug(s) when it has:
a black coating, worn electrodes, an oily film,
or cracks.
1. Center electrode
insulator
2. Side electrode
2.
Check the gap between the center and side
electrodes.
3.
Set the gap to 0.030 inch (.76 mm).
46
Figure 49
Figure 50
3. Air gap (not to scale)
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