23160-ZZ5-010ZA Case *NH8* - Overview. The 23160-ZZ5-010ZA Case *NH8* is a crucial component of Honda marine engine systems. This case serves as the primary gear housing, supporting the mechanical system that ensures smooth power transmission and protection of internal components. Its robust construction and exact factory specifications guarantee seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. OEM genuine Honda part designed specifically f