41100-ZVL-803ZB Gear Nhb14m Case - Overview. The 41100-ZVL-803ZB Gear Nhb14m Case is a critical component in Honda marine engine systems. This gear case supports the power transmission system, housing the gears that transfer mechanical motion from the engine to the propeller. Engineered to meet factory specifications, this part ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. This gear case is an OEM, genuine Honda replacement part