Quicksilver 8M0157328 Spark Plug LFR4A-EDesigned for select 75-115 HP EFI 4-Stroke Mercury Marine engines, this NGK spark plug ensures reliable ignition and consistent engine performance.NGK Standard spark plugs are proven technology that offer reliable performance. Actual OE or equivalent replacement spark plug. NGK Standard plugs are treated with corrosion-resistant plating to ensure ease of installation and removal. Part Number: LFR4A-E; Resistance (Ohm): 10000; Ground Electrode Core Material: Nickel; Center Electrode Core Material: Copper; Pre-Gap Size: .032; Hex Size: 5/8"; Insulator Height: 50.50 mm; Seat Type: Flat;