41100-ZY6-050ZB Gear Nhb14m Case - Overview. The 41100-ZY6-050ZB Gear Nhb14m Case is an essential component within Honda marine engine systems specifically designed to house and protect the gear assembly. This case plays a crucial role in maintaining the integrity and reliable operation of the marine powerhead's gear mechanism. Engineered for seamless integration, it matches factory specifications to ensure optimal performance and durability in marine environments.. Key Features. Genuine OEM gea