40201-ZV4-000ZA Case Nh210mc - Overview. The 40201-ZV4-000ZA Case Nh210mc is a critical component within Honda marine engine systems, serving as an extension case that provides structural integrity and protection. This part supports the assembly and operation of the marine engine by housing essential components in an Aqua Silver Metallic finish, ensuring seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM Honda extension case desig