Abstract: A pressure washer structured to output a pressurized fluid including an engine having a throttle plate structured to move between a closed position and a wide-open position, a pump driven by the engine and having an inlet and an outlet that discharges fluid, a spray gun having a spray gun inlet fluidly coupled to the outlet of the pump and a nozzle structured to discharge the fluid and having selectable nozzle orifices, and an electronic governor system structured to control a speed of the engine. The electronic governor system includes a carburetor, a motor coupled to the throttle plate to move the throttle plate between the closed and wide-open position, and a controller coupled to the motor to control the motor to control the speed of the engine in response to a selection of at least one of the one or more selectable nozzle orifices.