41100-ZVT-602ZC Gear *NHB14M* Case - Overview. The 41100-ZVT-602ZC Gear *NHB14M* Case is a crucial component of Honda marine engine systems. This gear case supports the lower unit system by housing and transmitting power from the internal gears, ensuring the marine engine operates reliably and efficiently. Designed to meet factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Durable gear case designed specific