Sierra’s 18-3904 Piston Rings area designed for use in Johnson and Evinrude outboard applications. It is interchangeable with GLM 24210, Johnson/Evinrude Outboard 394930, Mallory 9-54416, and Wiseco 3500KD. Each Sierra product meets or exceeds the original equipment part it replaces.
Bore Size: 3.500
Interchangeable with GLM 24210, Johnson/Evinrude Outboard 394930, Mallory 9-54416, and Wiseco 3500KD
Includes two piston rings
Each Sierra product meets or exceeds the original equipment part it replaces
