Mercury - Water Pump Kit, 200-400HP Verado Cooling System 8M0065072. Overview. If you've spent any time around the big Verado six-cylinders, you know the water pump is one part you can't afford to ignore. These engines move a ton of water, and when the pump starts getting tired, the engine lets you know-weak telltale, temps running a little warmer than usual, or that uneasy feeling when you're idling in hot water. This kit is the proper OEM setup for a range of 200-400HP Verado models and brings