31148-ZY1-010 Plate B - Overview. The 31148-ZY1-010 Plate B is a genuine OEM component designed specifically for Honda marine engine systems. This integral plate supports the flywheel cover system, ensuring the engine's flywheel area remains protected and sealed. Crafted to meet Honda's strict factory specifications, it guarantees seamless integration with existing hardware and components, maintaining optimal performance and durability in marine environments.. Key Features. Genuine OEM Honda par