41100-ZX2-C21ZA Gear Nhb14m Case - Overview. The 41100-ZX2-C21ZA Gear Nhb14m Case is a critical component of Honda marine engine systems. This gear case supports the lower unit system and plays a vital role in housing the gears that transfer power from the engine to the propeller. Engineered to exact factory specifications, this part ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. This gear case is a genuine OEM component designed