Engine generator

An engine generator comprising:

• an engine;
• a generator driven by the engine to generate power;
• a supply unit configured to supply the power generated by the generator to an external load;
• a switch configured to connect or disconnect the generator and the supply unit;
• a control unit configured to control the engine in one of a plurality of control states including a power generation state in which the generator and the supply unit are connected by the switch, and an engine speed, an air fuel ratio, and an advance of an ignition timing are controlled in accordance with the external load, a first standby state in which the generator and the supply unit are connected by the switch, and power is not supplied to the external load, and a second standby state in which the generator and the supply unit are disconnected by the switch;
• an acceptance unit configured to accept a switching instruction between the first standby state and the second standby state,
• wherein when the acceptance unit accepts a switching instruction from the first standby state to the second standby state, the control unit controls the switch to disconnect the generator and the supply unit, and reduces the engine speed of the engine from an engine speed in the first standby state to an engine speed in the second standby state.