41005-ZW9-040ZB Gear NHB14M Case - Overview. The 41005-ZW9-040ZB Gear NHB14M Case is an essential component in Honda marine engine systems. This gear case supports the lower unit propulsion system by housing the gears that transmit power efficiently, crucial for smooth operation and reliable boating experiences. Engineered to meet factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Precisely designed OEM gear