17723-ZY6-020 Hose - Overview. The 17723-ZY6-020 Hose is an essential component of the Honda marine fuel system, specifically crafted as the pressure regulator return hose. It plays a critical role in maintaining proper fuel flow in Honda marine engines, ensuring seamless operation and reliability for your marine adventures. Designed to the exact factory specifications, it guarantees flawless integration with existing hardware and seals, helping your engine perform optimally under marine conditi