41100-ZY3-C03ZD Gear *NH565* Case - Overview. The 41100-ZY3-C03ZD Gear *NH565* Case is an essential component within Honda marine engine systems. This gear case supports the drivetrain system, housing and protecting the gears that drive your marine engine's mechanical operation. Designed specifically for Honda marine applications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine Honda OEM component designed to meet factor