Sierra's 18-8367 Oil Seal is designed for use in Johnson/Evinrude engines. The o-ring features a 1.687" O.D., 0.250" width, and a 1.250" shaft size. The package includes one o-ring. It is interchangeable with GLM 86810 and Johnson/Evinrude Outboard 0334950. Check manufacturer recommendations to ensure a proper fit before purchasing. Each Sierra product meets or exceeds the original equipment part it replaces.