UFlex - Power A Mark II Single Engine Control Head with Trim - 42010R. The easy to install Power A Mark II control system provides fingertip operation of throttle and shift levers. Using reliable and precise digital data transmission, this single or dual function control system is specifically designed to work on mechanically controlled as well as electronic and electro-hydraulic gas and diesel inboards, sterndrives and outboards. The Power A Mark II comes with many features including Dock Assis