41100-ZW5-040ZA Gear Nh282MU Case - Overview. The 41100-ZW5-040ZA Gear Nh282MU Case is a critical component of Honda marine engine systems. It serves as the housing for the gear assembly within the lower unit, ensuring durability and precision in power transmission. Designed to maintain smooth mechanical motion and optimal water flow, this gear case supports the system's reliable performance. Engineered to match factory specifications and tolerances, it ensures seamless integration with existing