41100-ZVL-040ZB Case Assembly - NH565 - Overview. The 41100-ZVL-040ZB Case Assembly in NH565 is an essential component of Honda marine engine systems. It functions as a crucial gear case assembly that provides structural integrity and protection to the engine's internal gear mechanism. Designed specifically to support the marine gear system, this assembly ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM Honda marine gear