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Servicing the Spark Plug
Service Interval: Every 100 hours or yearly,
whichever comes first
Ensure that the air gap between the center and side
electrodes is correct before installing the spark plug.
Use a spark plug wrench for removing and installing
the spark plug(s) and a gapping tool/feeler gauge to
check and adjust the air gap. Install a new spark
plug(s) if necessary.
Type: Champion RN9YC or equivalent
Air gap: 0.75 mm (0.03 inch)
Removing the Spark Plug
1.
Disconnect the spark-plug wire from the spark
plug.
Figure 20
1. Spark-plug wire
2.
Clean around the spark plugs to prevent dirt
from entering the engine and potentially causing
damage.
3.
Remove the spark plug.
Checking the Spark Plug
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.
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.
Set the gap to 0.75 mm (0.03 inch).
Installing the Spark Plug
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Figure 21
Figure 22
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