41100-ZVT-701ZB Gear *NH565* Case - Overview. The 41100-ZVT-701ZB Gear *NH565* Case is a vital component in Honda marine engine systems. This gear case assembly supports the propulsion system by housing and protecting the internal gears that transmit power efficiently. Engineered to meet factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Precisely designed OEM gear case assembly for Honda marine engines.. Pr