17932-ZVT-600 Throttle Arm Shaft - Overview. The 17932-ZVT-600 Throttle Arm Shaft is a critical component within Honda marine engine systems. It plays a vital role in delivering precise throttle control by transmitting the movement of the throttle control lever to the engine's carburetor or fuel injection system. This function is essential in regulating engine speed, enabling smooth acceleration and effective power management. Built to OEM standards, it ensures seamless integration with existing