Mercury - Quicksilver Bearing Carrier Seal Sterndrive Component Marine-Grade Rubber 14077. Overview. Every boater knows the trouble a bad seal can cause - water in the gearcase, milky oil, or that slow loss of performance that sneaks up over time. The Mercury Marine 14077 Quicksilver Bearing Carrier Seal is the small, tough part that keeps those problems at bay. Designed for MerCruiser MR, Alpha One, Alpha One SS, and Alpha One Gen II sterndrives, it locks out water and keeps your gear lube righ