12000-ZVL-010ZA Block Assembly *NH8* - Overview. The 12000-ZVL-010ZA block assembly *NH8* is a critical component within Honda marine engine systems. It serves as the foundational structure housing the cylinders and core engine elements, supporting the engine's mechanical system to operate efficiently and reliably. Engineered to match Honda's exact specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM Honda