23172-ZVL-003 Mount Case Gasket - Overview. The 23172-ZVL-003 Mount Case Gasket is an essential component within Honda marine engine systems. This gasket plays a crucial role in sealing the mounting case, preventing leaks, and ensuring the engine components are securely fitted. As a genuine OEM gasket, it is manufactured to meet rigorous factory specifications, enabling seamless integration with existing parts and maintaining the overall performance and durability of your marine engine.. Key Fea