Surface gap plugs are highly resistant to pre ignition and are specified on many high output 2 stroke outboards. They usually need a high energy ignition system. The BU8H is a common fitment on Mercury engines.
- Surface gap design
- Trivalent metal plating for anti corrosion and anti seize protection
- Corrugated ribs to prevent flashover
- Copper core for heat removal
- Triple seals to prevent leakage
Sold individually. Check the plug code in your engine manual before ordering.



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