50201-ZVT-000ZB Swivel *NH565* Case - Overview. The 50201-ZVT-000ZB Swivel *NH565* Case is a specialized component crafted for Honda marine engine systems, playing a vital role within the rigging and accessory assemblies. This swivel case acts as a protective and functional housing that supports smooth rotational movement essential to the steering and mounting systems of various Honda marine engines. Engineered to precise specifications, it ensures seamless integration with existing parts, maint