56120-ZY3-023 Piston Rod - Overview. The 56120-ZY3-023 Piston Rod is a critical component designed specifically for Honda marine engine systems. This piston rod serves as an essential connection in the engine's power transmission, ensuring smooth mechanical motion and robust operation. As a genuine Honda OEM part, it meets strict factory specifications and tolerances to provide dependable performance and durability for your marine engine. Manufactured to integrate seamlessly with existing engine