Inspection - Coleman 400UTV-3 Owner's Manual

Inspection

The spark plug is an important engine
component and is easy to inspect. The
condition of the spark plug can indicate the
condition of the engine.
The ideal color of the porcelain insulator
around the center electrode is a medium to
light tan for a vehicle that is being ridden
normally.
Do not attempt to diagnose such problems
yourself. Instead, take the vehicle to a
service center. You should periodically
remove and inspect the spark plug because
heat and deposits will cause the spark plug
to slowly break down and erode. If electrode
erosion becomes excessive, or if carbon and
other deposits are excessive, you should
replace the spark plug with the specified
plug.
Periodic Maintenance and Adjustment
Specified spark plug:
DR8EA (NGK)
Installation
1. Measure the electrode gap with a wire
thickness gauge and, if necessary, adjust
the gap to specification.
a. Spark plug gap
8-25