The Sierra 18-3931 Piston Ring Set is interchangeable with the following: GLM 23710, Evinrude/Johnson 386279, Mallory 9-54404, Wiseco 2188KD. Each Sierra product meets or exceeds the original equipment part it replaces.
Sierra Piston Ring Set
Bore size: 2.188/Std
Sierra part number: 18-3931
Interchangeable with the following: GLM 23710, Evinrude/Johnson 386279, Mallory 9-54404, Wiseco 2188KD