17702-ZW9-900 Tube (6.3X500) - Overview. The 17702-ZW9-900 Tube (6.3X500) is a critical component of Honda marine engine systems, specifically designed for the fuel system. This 6.3mm diameter, 500mm long tube facilitates dependable fuel transfer, keeping your engine operating reliably. Precision-manufactured to match factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. OEM Honda tube, guaranteed genuine and n