Sierra’s 18-1142 Upper Pinion Bearing is designed to fit I, R, MR, Alpha One and Gen II engines with a 1.50 ratio. It is interchangeable with GLM 21560 and Mercruiser Stern Drive 31-32573A1. Each Sierra product meets or exceeds the original equipment part it replaces.
Designed to fit I, R, MR, Alpha One and Gen II engines with a 1.50 ratio
Interchangeable with GLM 21560 and Mercruiser Stern Drive 31-32573A1
Includes one bearing per package
Each Sierra product meets or exceeds the original equipment part it replaces
