56511-ZY1-871 Tube (Outer) - Overview. The 56511-ZY1-871 Tube (Outer) is a genuine Honda OEM part designed specifically for Honda marine engine systems. This component serves as a protective external tube, providing a conduit for rigging harnesses, fuel lines, and control cables. By enabling clean and secure routing within the marine rigging system, it helps maintain the overall integrity, reliability, and performance of your Honda marine equipment. Manufactured to exact factory specifications,