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Servicing the Kawasaki Engine (Cont.)
Servicing the Spark Plug
Service Interval: Every 100 hours - Replace the spark plugs.
Make sure the air gap between the center and side electrodes is correct before installing the spark plug. Use a
spark plug wrench to remove and install the spark plug. Use a gapping tool or feeler gauge to check and adjust
the air gap. Install a new spark plug if necessary.
Type: NGK BPR4ES or equivalent
Air Gap: 0.030 in. (0.76 mm)
Removing the Spark Plug
1. Park the machine on a level surface, disengage the PTO, stop the engine, engage parking brake, and remove
the key.
2. Disconnect the wire from the spark plug.
NOTE: 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.
Checking the Spark Plug
1. Inspect the spark plug.
NOTE: If you see light brown or gray coating on the insulator, the engine is operating properly. A black
coating on the insulator usually means the air cleaner is dirty.
NOTE: 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.
MAINTENANCE
Digital Edition - TITAN® HD Service Manual
January 2018
3-35
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