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Technical Information

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BASIC INFORMATION
Q6
 Why is the firing end appearance of a spark plug important?
A
 Because the firing end appearance reflects the suitability of the spark plug as well as the condition of the engine.
illustratiton
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Good Overheated Fouled
These are the three basic standards for evaluating a spark plug.
Spark plug tip temperature and firing end appearance
Spark plug tip temperature and firing end appearance
The border-line between the fouling and optimum operating regions (500 °C) is called the spark plug self-cleaning temperature.
It is at this temperature that accumulated carbon deposits are burnt off.
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