41112-ZW1-003 Vertical Shaft - Overview. The 41112-ZW1-003 Vertical Shaft is a vital component within Honda marine engine systems, specifically designed for use in Honda outboard motors. This shaft is crucial in transmitting rotational power from the engine to other parts of the drivetrain, ensuring smooth and reliable operation of your marine propulsion system. Crafted with precision to meet Honda's stringent factory specifications, it ensures seamless integration with existing parts, maintaini