Designed to control the throttle lever of marine main engines, this device offers significant advantages over traditional pneumatic speed control mechanisms. It eliminates the need for complex pneumatic piping layouts, reducing concerns over air-tightness and pressure maintenance, thereby enhancing installation efficiency. Equipped with a servo motor as the primary power source, this device provides smooth and reliable speed control with precise adjustments compared to diaphragm control valves. The servo motor is fitted with an absolute encoder, effectively addressing engine speed fluctuations during manual-to-automatic mode transitions.