Yamaha - Water Pump Repair Kit - 6E0-W0078-A3-00 - Engine Models 4 & 5Yamaha Water Pump Repair Kit Cooling System 6E0 W0078 A3 00 Overview When youre going into a Yamaha water pump, it usually makes sense to do it right the first time. Ive seen too many quick impeller swaps turn into repeat jobs because the rest of the components were already worn. A full repair kit like this takes care of everything in one shot and saves you from coming back in later. Once its rebuilt properly, you get solid water flow and dependable