A single lever control for combined control of the throttle in a marine engine and of a reversing gear includes a rocking lever mounted onto a supporting arm, which is connected to an actuator causing a reversing gear to transmit engine motion to a shaft driving a propeller or the like either in the same direction of rotation as the drive shaft or opposite thereto. The supporting arm is also dynamically connected to position sensors sensing the angular position of the lever and generating a signal uniquely related thereto. The signal is transmitted to a controller of a motorized actuator of the engine throttle. The angular displacement of the lever is transmitted to a transducer converting rotary motion into an electric signal uniquely related thereto via a gear drive having an input gear controlled by the supporting arm and an output gear connected to a transducer control shaft.