41112-ZY1-C20 Vertical Shaft - Overview. The 41112-ZY1-C20 Vertical Shaft is a critical component in Honda marine engine systems. It is designed specifically for use within the drivetrain system, facilitating the vertical transmission of mechanical power from the engine to the propeller assembly. By doing so, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Vertical shaft that transmits rotational power within the drivetrain.. An