23170-ZY9-010ZA Mount *NH8* Case - Overview. The 23170-ZY9-010ZA Mount *NH8* Case is an essential component in Honda marine engine systems. This mount acts as a reliable bracket securing the engine's crankcase, ensuring stable attachment and supporting the engine's structural integrity. Designed specifically for marine environments, it prevents vibration and movement, which could lead to premature wear or damage. With its OEM precision, it ensures seamless integration with existing parts, mainta