17680-ZX2-003 Outlet Valve - Overview. The 17680-ZX2-003 Outlet Valve is a vital component of Honda marine engine fuel systems, designed to regulate the flow of fluid out of the system efficiently. It plays an essential role in maintaining seamless engine operation by preventing backflow and ensuring that fluids move correctly within the engine's mechanisms. Crafted to match factory specifications perfectly, it guarantees compatibility and optimal functionality.. Key Features. Genuine OEM Honda