Mercury - Quicksilver Sea Water Pump Housing For V8 MerCruiser Engines with V-Belt Systems 807151A8. Overview. Saltwater is tough on metal, but the Mercury Marine 807151A8 Quicksilver Sea Water Pump Housing is built to handle it. Designed for V8 MerCruiser engines made by General Motors (454 and 502 CID, Gen V and VI), this durable plastic housing replaces traditional brass pump bodies that can corrode or seize over time. It's made to fit engines with V-belt accessory pulley systems and mechanic