90116-881-000 Hex (8X40) Bolt - Overview. The 90116-881-000 Hex (8X40) Bolt is an essential component designed for Honda marine engine systems. It plays a crucial role in securing elements within the engine, ensuring stable and reliable operation. Manufactured to precise factory specifications, this bolt is integral for maintaining structural integrity and optimal performance. Its design ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Featur