41100-ZY9-H52ZA Gear *NHB14M* Case - Overview. The 41100-ZY9-H52ZA Gear *NHB14M* Case is a vital component within Honda marine engine systems. It serves as the housing for essential gears that drive the marine propulsion mechanism. By securely enclosing and protecting the gears, it ensures smooth mechanical motion and reliable performance under demanding marine conditions. Engineered to match factory specifications, this gear case integrates seamlessly with existing hardware, contributing to opt