50211-881-000 Swivel Case Liner - Overview. The 50211-881-000 Swivel Case Liner is a vital component within Honda marine engine systems, specifically supporting the swivel case assembly responsible for front suspension and steering functions. This liner plays an essential role in protecting internal parts and ensuring the smooth operation of the swivel case, contributing to the overall reliability and performance of the marine engine system. Designed to OEM specifications, it ensures seamless in