40100-ZVD-000ZA Eng *NHB14M* Case - Overview. The 40100-ZVD-000ZA Eng *NHB14M* Case is a crucial lower engine case component supporting Honda marine engine systems. This genuine OEM part functions as the protective housing that encases the lower engine components, preserving the system's integrity and ensuring reliable performance in watercraft applications. Designed specifically for the NHB14M series, it plays a vital role in shielding mechanical parts from external elements while maintaining s