Yamaha - Electronic Cooling Water Pressure Sensor - 69J-8A4L0-15-00Yamaha Water Pressure Sensor Kit Engine Monitoring Component 69J 8A4L0 15 00 Overview Water pressure is one of those things you dont think about until something goes wrong. This sensor kit gives you a clear picture of whats happening inside the cooling system, so you can catch issues before they turn into bigger problems. When its working right, youve got confidence that water flow is where it should be, especially at higher speeds. Its a solid