17723-ZY9-F00 Hose - Overview. The 17723-ZY9-F00 Hose is a critical component in Honda marine engine systems, specifically designed to support the pressure regulator return system. This OEM hose plays a vital role in transporting fluids efficiently within the fuel system, helping to maintain optimal engine performance and reliability. Engineered to factory specifications, this hose ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Ge