Handheld engine-driven working machine

An engine-driven working machine comprising:

• an engine including an electronically controlled carburetor;
• and
• a controller connected to the electronically controlled carburetor;
• wherein the electronically controlled carburetor includes a solenoid valve for adjusting an amount of fuel supplied to the electronically controlled carburetor,
• wherein the controller is configured to determine whether or not the working machine is in a load state;
• wherein the controller is configured to vary a control value of the solenoid valve so as to increase an opening degree of the solenoid valve when a rotating speed of the engine is within a predetermined high rotating speed range, the working machine is not in the load state, and the rotating speed of the engine is higher than a target rotating speed,
• wherein the controller is configured to vary the control value of the solenoid valve so as to decrease the opening degree of the solenoid valve when the rotating speed of the engine is within the predetermined high rotating speed range, the working machine is not in the load state, and the rotating speed of the engine is lower than the target rotating speed, and
• wherein the controller is not configured to vary the control value of the solenoid valve when the rotating speed of the engine is within the predetermined high rotating speed range, the working machine is in the load state, and the rotating speed of the engine is lower than the target rotating speed.