50211-ZZ5-000 Swivel Case Liner - Overview. The 50211-ZZ5-000 Swivel Case Liner is an essential component designed to support Honda marine engine systems. This part acts as an internal protective layer within the swivel case, a key element in the marine drive unit. By safeguarding the assembly against wear and corrosion, it ensures the system operates reliably and smoothly. Manufactured to OEM-level standards, it ensures seamless integration with existing parts, maintaining optimal performance a