41101-ZY3-C00ZD Gear *NH565* Case - Overview. The 41101-ZY3-C00ZD Gear *NH565* Case is a crucial component of Honda marine engine systems. It supports the gear assembly by housing and protecting the gears that transfer power from the engine to the propeller, enabling smooth propulsion. Designed with precision to match factory specifications, this gear case ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM Honda gear case