41101-ZZ5-000ZB Gear *NHB14M* Case - Overview. The 41101-ZZ5-000ZB Gear *NHB14M* Case is a critical component of Honda marine engine systems. This gear case supports the lower unit assembly, playing a central role in housing and protecting the gear mechanisms that transfer power from the engine to the propeller. By ensuring robust protection and alignment within the gear system, it helps maintain smooth, reliable operation of your marine equipment. Designed to OEM specifications, it ensures seam