41100-ZY9-H02ZA Gear Nhb14m Case - Overview. The 41100-ZY9-H02ZA Gear Nhb14m Case is an essential component within Honda marine engine systems. Designed to house the gear assembly, it plays a crucial role in protecting and supporting the gear mechanism that drives the propulsion system. Built to exact factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM gear case designed precisely for Honda marine