Yamaha Nozzle YA2-28632-11-08. Overview. The Yamaha Nozzle YA2-28632-11-08 is a genuine original equipment manufacturer component designed to precisely direct and control the flow of fluid within the engine system. Whether used in a fuel or cooling application, this nozzle plays a critical role in ensuring accurate distribution, helping maintain efficient engine performance and system reliability.. Proper flow control is essential for consistent engine operation. Over time, nozzles can become cl