41100-ZW6-000ZA Gear NH246 Case - Overview. The 41100-ZW6-000ZA Gear NH246 Case is a crucial component in the Honda marine engine systems, specifically designed to house and protect the internal gears of the lower unit. Its primary function is to ensure the durability and efficient operation of the marine gear system by maintaining proper alignment and protection against environmental elements. Built to strict OEM standards, it ensures seamless integration with existing parts, maintaining optima