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Need Help with NGK Numbering Convention 1800 1973

posted by  Phil S. on  Sat Oct 3 17:17 CST 2015
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last visit: Fri Oct 24 13:18 CST 2014
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The E has a longer threaded length than the H. The E is correct for a B21/23/230, but will cause detonation in a B18/20 (if it doesn't actually hit the piston).

6 is the heat range -- higher numbers are cooler, lower are hotter. This is how much heat the plug dissipates, not how "hot" the spark is.

P means it has a projected tip -- the electrodes stick out further.

Not sure what the B or S means.






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New Need Help with NGK Numbering Convention [1800][1973]
posted by  Chris Mullet subscriber  on Sat Oct 3 15:25 CST 2015 >


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