Oregon 77-313-1 Spark Plug Replaces Bosch W9ECO Champion J17LM NGK B4LM Replaces Honda 15400-679-023 15400-POH-305 15410-MJO-003 15410-MJO-004 15410-MJO-405, John Deere AM101378, Kubota # 70000-15241, , Troy Bilt# 1874139, Yanmar # 129150-35150 Fits model GX60K1, For water cooled engines on tractor models 3813 & 4514 Anti-drain valve, OD: 3-1/8in x Ht. 2-7/8in, 27 Micron Mounting thread M20 x 1.5 , Mounting seal OD: 2-1/2in, Relief pressure 11-14 PSI