91051-ZY3-003 Bearing (50x90x21.5) - Overview. The 91051-ZY3-003 Bearing (50x90x21.5) is a high-quality tapered bearing designed for Honda marine engine systems. It plays a crucial role in supporting mechanical motion by reducing friction between rotating parts, which helps maintain the engine's efficiency and longevity. Engineered to strict factory specifications, the bearing ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Precisi