41100-ZVT-000ZC Case Assy. Gear *NHB14M* - Overview. The 41100-ZVT-000ZC Case Assy. Gear *NHB14M* is an essential part of Honda marine engine systems. This genuine OEM gear case supports the gearbox system, protecting and containing critical gears that enable efficient marine propulsion. Precisely manufactured to meet factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM gear case designed for Honda