Upper Pinion Bearing, Mercruiser

Upper Pinion Bearing for Mercruiser Stern Drive. Fits: I, R, MR, Alpha One & Gen II w/ 1.50 ratio. Replaces Mercruiser 31-32573A1, and GLM21560. Premium Quality For Longer Life. Meets or exceeds manufacturer's recommended specifications. Backed by Sierra's limited lifetime warranty. Fits: I, R, MR, Alpha One & Gen II w/ 1.50 ratio Replaces Mercruiser 31-32573A1, and GLM21560 Premium Quality For Longer Life Meets or exceeds manufacturer's recommended specifications Backed by Sierra's limited lifetime warranty