90752-ZW9-000 Woodruff Key - Overview. The 90752-ZW9-000 Woodruff Key is an essential component in Honda marine engine systems, specifically designed to support precise mechanical power transmission in the engine's key system. This semicircular metal key prevents relative rotation between the shaft and the attached components, ensuring smooth operation and preventing slippage. Its seamless integration with existing factory components maintains optimal performance and durability in your marine en