23176-ZW5-003 Gasket - Overview. The 23176-ZW5-003 Gasket is a critical component for Honda marine engine systems. It functions primarily as a seal in the mount case cover system, preventing leaks and maintaining the watertight integrity essential for reliable marine engine operation. Designed specifically for marine applications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. The gasket is an OEM genuine component tailored for