Mercury – Upper Water Pump Repair Kit | Cooling System | Polymer & Elastomer Components | 8M0061040Mercury Upper Water Pump Repair Kit Cooling System Polymer & Elastomer Components 8M0061040 Overview Every boater knows that a dependable cooling system is the quiet heartbeat of an engine that lasts. When youre running across open water, trimming into a tight channel, or just easing back toward the dock after a long day, you want the comfort of knowing your outboard is being cooled the way Mercury intended. The Quicksilver 8M0061040 Upper Water Pump