Yamaha Nozzle Assembly YA2-28632-01-10. Overview. The Yamaha Nozzle Assembly YA2-28632-01-10 is a genuine original equipment manufacturer component designed to precisely control and direct fluid flow within the engine system. This assembly plays a critical role in ensuring accurate distribution, supporting efficient engine performance and consistent operation.. Proper flow management is essential for maintaining engine efficiency and reliability. Over time, nozzle assemblies can become clogged,