Mercury - Quicksilver Sea Water Pump Impeller Kit Cooling System Component One-Piece Pump Body 59362T6. Overview. Reliable water flow is the key to keeping your MerCruiser cool and running strong. The Mercury Marine 59362T6 Quicksilver Sea Water Pump Impeller Kit is made for MerCruiser engines with engine-mounted, one-piece plastic sea water pumps. This 4-piece OEM kit includes the impeller, wear plate, and o-rings - everything you need to refresh your pump and restore proper cooling flow. Each