41005-ZY1-050ZB Gear Nhb14m Case - Overview. The 41005-ZY1-050ZB Gear Nhb14m Case is a critical component of Honda marine engine systems, specifically designed to house and protect internal gears. This gear case supports the propulsion system by ensuring that mechanical motion is reliably transmitted with optimal protection and durability. Manufactured to precise factory specifications, it guarantees seamless integration with existing parts, maintaining optimal performance and durability for you