Briggs & Stratton, l-head spark plug, fits most b&s l-head engines including 475, 500, 600, 625, 650 & 675 series, also fits previous classic, sprint, quattro & quantum series b&s engines with a range of 3hp- 23hp, for use on such brands as craftsman, husqvarna, john deere, mt, poulan, poulan pro, snapper, toro & many others equipped with the listed engines, replaces champion model #s rj19lm, rj17lm, rcj8, j19lm, j17lm & cj8, diy version of Briggs service part# 802592s.