Mercury Quicksilver NGK IZFR5J Spark Plug 33-892567Q
- Brand:
- Quicksilver
- Part no:
- 892567Q
Image: Powerboat Supply
Where to buy
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This is the NGK IZFR5J spark plug sold under Mercury and Quicksilver part number 892567Q. It comes already gapped to the engine maker's specification. The insulator is pure alumina silicate ceramic, and a ribbed suppressor seal is there to extend resistance and stop spark flash over. Fit only the plug your engine's owner's manual calls for.
Our take
The IZFR5J comes pre-gapped to the engine maker's figure, so you can skip the feeler gauge for a first fit. The catch is that it only belongs where your owner's manual names it; the wrong plug can hurt performance or the engine.