Lower Oil Seal 26-89238 26-33144 26-77634 for Mercruiser Alpha One Generation I Sterndrives 1972-1990 18-2014 85070 This lower oil seal is designed for use with Mercruiser Alpha One Generation I Sterndrives produced between 1972 and 1990.It replaces OEM part numbers 26-89238, 26-33144, 26-77634, 18-2014, 85070, and others, providing a precise fit to help maintain proper oil retention and prevent leakage.The seal is constructed from rubber material suited for marine environments and meets 105℃ volatile material standards.Its dimensions are O.D.: 1.500 inches (38.1mm), Shaft Size: 0.875 inches (22.2mm), Width: 0.312 inches (7.9mm).This replacement seal supports and is suitable for standard maintenance and repair of compatible sterndrive units. This is a non- replacement.Any reference to brand names or models is strictly for compatibility purposes.