Yamaha Water Pump Packing YF1-68717-34-30. Overview. The Yamaha YF1-68717-34-30 Water Pump Packing is a genuine original equipment manufacturer sealing component designed to help maintain proper water pump performance and prevent leaks within the cooling system. This packing helps create a secure seal between water pump components, ensuring that cooling water flows efficiently through the system without escaping or losing pressure.. A properly functioning seal is essential for maintaining coolin