17620-881-043 Fuel Filler Cap - Overview. The 17620-881-043 Fuel Filler Cap is an essential component of Honda marine engine systems. This cap secures the fuel tank by sealing it tightly, preventing fuel spills and contamination while maintaining the necessary airtight environment. Designed specifically for Honda's marine fuel system, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM fuel filler cap designed to match H