50215-ZW9-000 Swivel Case Collar - Overview. The 50215-ZW9-000 Swivel Case Collar is an integral component of Honda marine engine systems. This part supports the steering and swivel mechanism, crucial for the smooth articulation and maneuverability of your outboard motor. Manufactured to meet factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Designed as a collar for the swivel case in Honda marine engines,