91055-ZY6-004 Bearing (50X90X20) - Overview. The 91055-ZY6-004 bearing (50X90X20) is a crucial component within Honda marine engine systems. This bearing supports smooth mechanical motion and optimal load distribution in key engine assemblies, helping to maintain operational reliability and extend the lifespan of your equipment. Engineered to match factory specifications precisely, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features.