50211-ZVA-000 Swivel Case Liner - Overview. The 50211-ZVA-000 Swivel Case Liner is a critical OEM component that supports the swivel case system of Honda marine engine systems. This part serves as a protective liner that cushions and houses moving components inside the swivel case assembly, ensuring smooth mechanical operation and preventing premature wear. Designed specifically for compatibility with various Honda marine engines, it ensures seamless integration with existing parts, maintaining