90008-ZY9-023 Bolt-Washer (10X105) - Overview. The 90008-ZY9-023 Bolt-Washer (10X105) is a vital fastening component used in Honda marine engine systems. This bolt-washer assembly ensures secure mounting of engine parts, supporting the overall integrity and reliability of the marine engine's mechanical systems. Designed for seamless integration with Honda Active Marine equipment, it maintains the precise specifications required for optimal system operation and durability.. Key Features. Genuine