90103-ZY1-871 Hex Bolt - Overview. The 90103-ZY1-871 Hex Bolt is an essential fastener used within Honda marine engine systems. It plays a vital role in securing components reliably to ensure the smooth operation and durability of the engine assemblies. Designed to exacting OEM standards, it fits seamlessly into Honda's power trim-tilt and other critical engine assemblies, maintaining consistent performance and reliability. By using this hex bolt, marine engine systems uphold safety and mechanic