MERCURY SPARKPLUG by NGK

Supersession Chain:
- 858250 (Mercury)
- 14814548 (Mercury)

14mm Thread, 12.7mm (1/2") Reach, 13/16" (20.6mm) Hex Size, Gasket Seat, Inductive Resistor, Removable Terminal, JIS Height, Projected Tip, .040" (1.016mm) Gap, Heat Range 8

NGK traditional plugs are constructed for longer life and optimum performance. Corrugated ribs prevent flashover. NGK uses only the purest alumina silicate in its ceramic insulator which give all NGK plugs greater strength and better heat transfer. Copper cored and triple sealed to further aid in heat removal and prevent interior leakage. Contains a special inductive resistor which must be used with CDI ignition systems.

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