Yamaha - Water Pump Repair Kit Cooling System Service Kit 67F-W0078-00-00. Overview. If you run a Yamaha long enough, you'll eventually be servicing the water pump - it's just part of good maintenance. This Yamaha Water Pump Repair Kit includes the core components needed to restore proper water flow through the cooling system. A fresh pump kit keeps water circulating the way it should, helping prevent overheating and protecting the powerhead during long runs. When the tell-tale stream weakens or