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Spark plug 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.
For example, a very white center electrode
porcelain color could indicate an intake air leak
or carburetion problem for that cylinder. Do not
attempt to diagnose such problems yourself.
Instead, take the machine to a KYMCO dealer.
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, you
should replace the spark plug with one of the
proper type.
Standard spark plug:
NGK CR7HSA
103
Before installing the spark plug, measure the
electrode gap with a feeler gauge and adjust to
specification.
Spark plug gap:
0.6~0.7 mm (0.024~0.028 in)
Tightening torque:
Spark plug:
12.5 Nm (1.25 m.kg, 9.1 ft.lb)
When installing the spark plug, always clean the
gasket surface and use a new gasket. Wipe off
any grime from the threads and tighten to the
specified torque.
A. Spark plug gap
112


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