40201-ZW9-C00ZA Ext*Nh282mu* Case - Overview. The 40201-ZW9-C00ZA Ext*Nh282mu* Case is a vital external casing component for Honda marine engine systems. It plays a key role in housing and protecting internal parts of the extension case assembly, ensuring seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM Honda extension case designed specifically for the marine engine system.. Manufactured to meet exact factory specifications, di