23175-ZW5-000 Mount Case Cover - Overview. The 23175-ZW5-000 Mount Case Cover is a crucial component in Honda marine engine systems. Serving as a protective housing, it supports the mounting assembly to ensure the engine's structural integrity and protection from environmental elements. Designed to fit precisely, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Protective cover designed specifically for Honda marine engines to sa