NGK IZFR6J Spark Plug
- Brand:
- NGK
- Part no:
- 843220Q
Image: Powerboat Supply
Where to buy
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The NGK IZFR6J is a spark plug with an alumina silicate ceramic insulator and a ribbed suppressor seal. It is also known by the Mercury number 843220Q. The plugs come pre-gapped to the engine maker's setting. A common spark plug socket is all that is needed to change them.
Our take
The IZFR6J comes pre-gapped to the engine maker's setting, so the gap needs no adjusting before it goes in. Its ceramic insulator is alumina silicate, which the maker ties to strength, and a common plug socket handles the change.