41100-ZVP-603ZA Gear Nh565 Case - Overview. The 41100-ZVP-603ZA Gear Nh565 Case is a vital component designed to support the gear system within Honda marine engine systems. It functions as the protective housing for internal gears, ensuring mechanical motion is maintained seamlessly and reliably for marine propulsion applications. Manufactured to meet exact OEM specifications, it guarantees smooth integration and long-lasting operation in demanding marine environments.. Key Features. Genuine OEM