41100-ZVL-903ZC Gear NHB14M Case - Overview. The 41100-ZVL-903ZC Gear NHB14M Case is a crucial component in Honda marine engine systems. This gear case assembly houses and protects the gears within the marine propulsion system, ensuring smooth mechanical operation and safeguarding internal parts from external elements. Designed to fit precisely within the engine system, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM