Mercury - Quicksilver Water Pump Base Repair Kit Cooling System Component Marine Composite 57234T1. Overview. A strong cooling system keeps your sterndrive running cool and reliable. The Mercury Marine 57234T1 Quicksilver Water Pump Base Repair Kit gives you the parts you need to restore that performance on MerCruiser MC-1 and R drives. This three-piece OEM kit includes a new molded pump base, gasket, and o-ring - all made from durable, marine-grade materials designed to handle pressure, heat, a