40101-ZW2-425ZB Eng Nhb14m Case - Overview. The 40101-ZW2-425ZB Eng Nhb14m Case is a vital component of Honda marine engine systems. This OEM lower engine case provides essential protection and structural support to internal engine components, ensuring the engine remains securely housed and operates efficiently. Crafted to meet Honda's strict factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. OEM Genuine Hon