41005-ZW6-C11ZA Gear *NH246* Case - Overview. The 41005-ZW6-C11ZA Gear *NH246* Case is a vital component within Honda marine engine systems, specifically designed to support the lower unit gear assembly of outboard motors. This gear case securely houses and protects the gears that transmit power from the engine to the propeller, ensuring reliable mechanical motion and smooth operation on the water. Engineered to meet factory specifications, it guarantees seamless integration with existing parts,