Honda Vertical Shaft 41112-ZW5-020 - Overview. The Honda Vertical Shaft 41112-ZW5-020 is a critical part of the Honda marine engine system, specifically designed to support the propulsion system by transmitting rotational power from the engine to the propeller assembly. This component plays a pivotal role in ensuring the mechanical motion within the outboard motor stays reliable and efficient, thus keeping your marine engine operating smoothly.. Key Features. The Vertical Shaft 41112-ZW5-020 is