The spark plug insulator, is typically made of high-strength ceramic. And, prevents flashover, which is when the high voltage leaks along the plug surface to the grounded metal case.
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Ignition Systems
Spark Plug – How Do I Read, the Condition of My Spark Plugs
Learning how to read the condition of a spark plug, can be a valuable tuning aid. Because, you can determine a great deal about your engine’s, overall operating condition. Usually, just by examining the plugs […]
