Provides long life with the copper core center electrode.Champion, J8C, Small Engine/Lawn & Garden Spark Plug, Stock #841-1, Fits chainsaws, generators, pumps, construction equipment, lawn mowers, motorcylces, mini bikes, scooters, evinrude; johnson;mercurcy marine engines,vacuums, shredders, tillers,brushcutters, trimmers, log splitters, aerators, and edgers. That are used in engines/brands such as: Tecumseh, robin, kawasaki, clinton, tanaka, troy-bilt, john deere, ingersoll, gravely, cub cadet, ariens, yardman, weed eater, husqvarna, bolens, jacobsen,generac,mccullogh, homelite, pioneer, waukesha, allis chalmers, hobart, massey ferguson.