40201-ZZ3-000ZC Case *NHB14M* - Overview. The 40201-ZZ3-000ZC Case *NHB14M* is a critical extension case component for Honda marine engine systems. This OEM part plays a vital role in housing and protecting internal engine components, supporting the overall durability and reliability of your Honda marine engine. Designed to seamlessly integrate with existing hardware, it ensures continued optimal performance through perfect fit and factory-spec dimensions.. Key Features. This case extension is a