Inspection - Hisun HS500 Owner's Manual

8-24 Periodic Maintenance and Adjustment
1. Spark plug cap
3. Use the spark plug wrench in the tool kit
to remove the spark plug as shown.
1. Spark plug wrench

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.