Mercury - Water Pump Repair Kit Cooling System Restoration Kit Marine-Grade Components 8M0100527. Overview. If you spend enough time on the water, you start to recognize the small signs of an engine that's running just right-the soft hum at idle, the steady temperature, that calm confidence that you're not about to get stranded when you're miles from the dock. The Mercury 8M0100527 Water Pump Repair Kit is made for boaters who know how important those details really are. When silt, sand, or debr