41100-ZVL-902ZC Gear *NHB14M* Case - Overview. The 41100-ZVL-902ZC Gear *NHB14M* Case is a critical part of Honda marine engine systems. It provides a durable housing for the gear assembly, ensuring reliable transfer of mechanical motion within the lower unit of the engine. This gear case supports drivetrain function, maintaining the proper alignment and smooth operation required for optimal boat performance. Engineered to exact factory specifications and OEM quality standards, it ensures seamle