Coleman OUTFITTER 700-L Owner's Manual page 120

1. Spark plug wrench
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
medium-to-light tan for a vehicle that is being
ridden normally.
electrode is a
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.
Specified spark plug:
DCPR7E (NGK)
1. Measure the electrode gap with a wire
thickness gauge and, if necessary, adjust
the gap to specification.
Spark plug gap:
0.6-0.7mm(0.023-0.027 in)