NGK BPZ8HS-15 Spark Plug, Mercury 14814568
- Brand:
- Mercury
- Part no:
- 14814568
Image: Powerboat Supply
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This is a Mercury and Quicksilver spark plug, part 14814568, which is an NGK BPZ8HS-15. It comes pre-gapped to the engine maker's specification, though the gap should still be checked before it goes in. The insulator is NGK pure alumina silicate ceramic, a ribbed suppressor seal is fitted to resist spark flash over and misfire, and a triple seal is there to hold back leakage. Fit only the plug your owner's manual lists.
Our take
The triple seal and the ribbed suppressor seal are the features to note: they are there to stop leakage and spark flash over. The advice to check the gap before installing still applies even though the plug arrives pre-gapped to the engine maker's spec.