91551-Zv4-810 Distance Collar - Overview. The 91551-ZV4-810 Distance Collar is an essential component within Honda marine engine systems. This distance collar acts as a precise spacer that ensures proper alignment and spacing of mechanical assemblies, contributing to the reliable operation and longevity of the engine. Manufactured to match exact OEM specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM Dist