Top Cover Bearing Cup 91-38918 Alpha 1-5/16" OD 

This top cover bearing cup driver replaces OE # 91-38918 and is used to install the bearing cup in the top cover of the driveshaft housing. It can be used with MC-1, R, MR, and Alpha One sterndrive units. It will only work on units that have a 1-15/16" outside diameter bearing.