Yamaha Water Shut Valve 6T0-14673-00-00. Overview. The Yamaha Water Shut Valve 6T0-14673-00-00 is a genuine original equipment manufacturer component designed to regulate the flow of water within your engine's cooling system. This valve plays a critical role in controlling water circulation, helping maintain optimal engine temperature and prevent overheating.. Engineered to Yamaha's exact specifications, this water shut valve provides a precise fit and reliable operation. It is an ideal replacem