23170-Zw5-000za Mount Nh8 Case - Overview. The 23170-ZW5-000ZA Mount Nh8 Case is a vital component within Honda marine engine systems, serving as a secure mounting case tailored to fit specific Honda outboard engines. This dark gray case mount is designed to provide essential structural support and precise housing for engine components, ensuring the marine engine maintains reliable operation under demanding conditions. Constructed to factory specifications, it guarantees seamless integration wit