40201-ZV4-700ZA Case *NH210MC* - Overview. The 40201-ZV4-700ZA Case *NH210MC* is an essential extension case component supporting Honda marine engine systems. This part serves as a protective housing that maintains precise alignment and safeguards internal mechanisms within the marine engine's lower unit. Designed specifically for Honda marine engines, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine Honda OEM extension c