A hand throttle can be added to PTO applications requiring a variable speed PTO. This can be accomplished by removing the potentiometer in the PTO harness and replacing it with a hand throttle. DirectDrive stocks hand throttles along with a custom wiring harness. Hand throttles are available in either a clockwise or counterclockwise direction for advancing the engine speed. DirectDrive can help you select a hand throttle and provide guidance on how to wire it into the PTO system.