56517-ZY1-871 Set Plate - Overview. The 56517-ZY1-871 Set Plate is an OEM component designed specifically for Honda marine engine systems, playing a crucial role in the power trim-tilt mechanism. This plate serves as a fundamental mounting or support component, ensuring the secure attachment of related hardware and contributing to the smooth operation of the engine's trim and tilt functions. By maintaining exact factory tolerances and measurements, it ensures seamless integration with existing p