41100-ZVL-030ZC Gear *NHB14M* Case - Overview. The 41100-ZVL-030ZC Gear *NHB14M* Case is a vital component within Honda marine engine systems. It houses and protects the gears responsible for power transmission in the marine propulsion setup. Designed to maintain your engine's mechanical integrity, this gear case ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. This OEM gear case is designed specifically for the NHB14M system, ensur