Yamaha - Water pump repair kit - 6A1-W0078-02-00Yamaha Water Pump Repair Kit Cooling System Service Kit 6A1 W0078 02 00 Overview If theres one thing thatll ruin a day on the water fast, its an overheating engine. The water pump is what keeps everything cool, and once it starts wearing out, youll see weak flow or rising temps pretty quickly. This is the kit you use when you want to service it properly and not worry about it again for a while. Its one of those maintenance jobs that pays off every