CHAMPION Spark Plug J8C 841-1 Replaces J43 J7 J7J J7JM J8 J8J RJ8C J8JM UJ8 018-3061-6 for 2-Cycle and 4-Cycle Engines CHAMPION Spark Plug J8C 841-1 Replaces RJ8C 018-3061-6 for 2-Cycle and 4-Cycle Engines Use the Champion J8C Spark Plug for Mowers, Chain Saws and Pumps to keep your engine performing at a high level. The spark plug is designed to withstand high temperatures and fits most small-engine brands and models. For use with walk-behind lawn mowers, chain saws and pumps Champion copper plus small engine plugs resist fouling and provide superior corrosion resistance Feature a copper core electrode that provides increased conductivity and heat control while delivering good overall wear characteristics Engineered to exceed OE designs and maximum durability Designed for easy starting Plug Type: J8C Seat Type: Gasket Hex Size: 13/16 in (20.64 mm) Thread Size: 14 mm Thread Reach: 0.375 in (9.5 mm) Taper Diameter: 0.25 in Installed Height: 2.24 Gap: 0.027-0.033in (0.69-0.84 mm) Center Electrode Material: Nickel Copper Alloy Ground Electrode Material: Nickel Copper Alloy Classification: Champion Copper Plus Small Engine Resistor Plug: Non-resistor MPN: J8C #841-1 UPC: 037551011087 USA domestic shipments are shipped USPS Ground Advantage Mail with Tracking