One New Aftermarket Replacement Spark Plug Fits Homelite: Hg600, Hge3500, Hl2500, Hl4400, Hle4400, Lr2500, Lr4400, Lr5500, Lre4400, Lre5500, Lri2500, Lri4400, Lri5500, Lrie4400, Lrie5500, Fits Honda: Em500, Em500K1, Em600, Fits Mcculloch: Pro 2300E, Fits Powermate: Pm4500, Fits Yamaha: Ef600, Fits Ariens: 520, 522, M21, Ss322, St524 Replaces Part Number: Fits Autolite: 245 Fits Bosch: Wsr9E Fits Champion: Rcj8 Fits NGK: Bmr6A, 7421 Fits Nippondenso: W20Mr-U Fits Torch: L6Rc