Hex Size: 5/8 in. (16mm) Seat Type: Gasket Resistor: Yes Gap: 0.031 in. Spark Plugs. 🔧 Resistor plug minimizes electronic interference 🔧 Long reach design supports efficient ignition 🔧 Copper core ensures optimal heat dissipation 🔧 OEM fit for many EFI marine outboards.
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