Champion 821M L77JC4 Marine Spark Plug (SOLD EACH)

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Conventional spark plug with nickel alloy electrodes. Copper core center electrode allows for increased conductivity and heat control Thread Diameter: 14mm Thread Pitch: 1.25mm Sea t Type: Gasket Reach: 12.7mm (1/2") Hex Size: 13/16" (21mm) Terminal Type: Solid Gap: .039" (1.0mm) Center Electrode Material: Nickel Type: Standard Size: 2.5mm Projection: Non-Projected Ground Electrode Material: Nickel Type: Cut Back Quantity: 1 Specifications Resistor: No Heat Range: 77 Torque Specs: Cast Iron: 26-30 lb. ft. Aluminum: 18-22 lb. ft. Show more