90037-ZY3-000 Flange (8X65) Bolt - Overview. The 90037-ZY3-000 Flange (8X65) Bolt is a genuine OEM Honda marine engine part essential for securing components within Honda's marine engine systems. As a critical fastening element designed specifically for Honda marine applications, this bolt supports the integrity and reliability of your marine engine assembly. With its 8x65mm flange head design, it ensures seamless integration with existing parts, maintaining optimal performance and durability..