41100-ZVT-010ZB Gear Nh565 Case - Overview. The 41100-ZVT-010ZB Gear Nh565 Case is a critical component within Honda marine engine systems. This gear case houses vital gears that support efficient mechanical motion and power transmission for marine propulsion. Engineered to meet or exceed factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM Honda marine engine gear case designed for the NH565 serie