50211-ZV5-003 Swivel Case Liner - Overview. The 50211-ZV5-003 Swivel Case Liner is a critical component within Honda marine engine systems. It functions as a protective sleeve or liner for the swivel case assembly, playing a vital role in supporting smooth and reliable swivel motion. By ensuring proper clearance and reducing wear between moving parts, it helps maintain the integrity and operational longevity of the marine engine's lower unit system. Designed specifically for Honda marine applica