23170-ZVL-B10 Mount Case - Overview. The 23170-ZVL-B10 Mount Case is a critical component in Honda marine engine systems, serving as a robust protective housing and mounting point for key engine parts. This essential part supports the engine mounting system, ensuring stability and reliable operation of the marine engine. Designed to seamlessly integrate with existing components, it maintains optimal performance and durability to keep your marine engine functioning at its best.. Key Features. Gen