41112-ZVP-601 Vertical Shaft - Overview. The 41112-ZVP-601 Vertical Shaft is a precision-engineered component essential for the reliable operation of Honda marine engine systems. Serving as a critical linkage, this vertical shaft transmits rotational power within the marine propulsion system, supporting the drivetrain's performance and responsiveness. Accurately manufactured to meet OEM standards, it ensures seamless integration with existing parts, maintaining optimal performance and durability