41100-ZVT-701ZC Gear *NHB14M* Case - Overview. The 41100-ZVT-701ZC Gear *NHB14M* Case is a critical component within Honda marine engine systems. This gear case assembly supports the marine propulsion system by housing and protecting essential gearing parts. Engineered to meet factory specifications, it plays an important role in ensuring the mechanical motion and durability of the system, while maintaining seamless integration with existing components to provide reliable performance on the wate