26-32511A1 26-32511A2 Upper Seal Kit for Mercruiser Alpha 1 Generation 1 Drives 1972-1990 18-2648 87500 This upper seal kit is designed for Mercruiser Alpha 1 Generation 1 Drives manufactured between 1972 and 1990.It fits MerCruiser Sterndrive R / MR and Alpha One Gen I models and is not compatible with Gen II drives.The kit contains the following components: 2 drain gaskets, 1 gasket, 2 oil seals, 1 seal, 1 bushing, 1 , and 1 additional seal. Constructed with rubber, aluminum, and stainless steel, the components are suited for marine use and can withstand temperatures up to 105℃.The design supports sealing performance during in various water conditions.Installation is intended to be straightforward, providing a complete set of parts necessary for maintaining drive unit integrity.Proper fitment depends on matching the part to the correct engine model, serial number, and production year. Disclaimer: This part is produced by a third-party manufacturer.Brand/model mentions are for compatibility illustration only.