Mercury - Driveshaft Housing Seal Kit Alpha One Gen II Composite & Rubber 88397A1. Overview. There's a certain peace you feel when your boat responds exactly the way it should - no hesitation, no strange vibrations, just smooth power as you ease across the water. That confidence doesn't happen by accident; it comes from choosing the right parts in the places that matter most. The Mercury Marine part number 88397A1 Driveshaft Housing Seal Kit is one of those behind-the-scenes components you rarel