Mercury - Quicksilver Sea Water Pump Housing Brass Cooling Component V8 MerCruiser Engines 72774A32. Overview. When reliability in saltwater matters, brass beats everything else. The Mercury Marine 72774A32 Quicksilver Sea Water Pump Housing is crafted from solid brass to resist corrosion and extend pump life in V8 MerCruiser engines with a V-belt pulley system. Designed as a direct OEM replacement, it maintains the same precision fit and water flow your original housing provided. With included