Mercury - Quicksilver Bell Housing Hinge Pin Washer Sterndrive Hardware Component Phenolic Material 41721. Overview. Small parts often do big jobs. The Mercury Marine 41721 Quicksilver Bell Housing Hinge Pin Washer is one of those quiet essentials that keeps your MerCruiser drive running smoothly. Designed for MerCruiser Alpha One Gen II and Bravo sterndrives, this washer sits between the gimbal ring and bell housing, reducing friction and wear during steering and trim movement. Made from a toug