Engine generator

An engine generator comprising:

• a housing;
• an engine and a generator driven by the engine, the engine and the generator being disposed in the housing;
• a choke valve provided in an intake system of the engine;
• and an opening and closing mechanism for driving the choke valve,
• wherein the opening and closing mechanism comprises:
• a control shaft provided to a valve shaft of the choke valve to be rotatable relative to the valve shaft within a predetermined angular range;
• a first urging member that is provided between the valve shaft and the control shaft and urges the valve shaft relative to the control shaft in a direction in which an opening degree of the choke valve decreases;
• a restriction mechanism that sets a minimum opening degree of the choke valve by restricting a range of rotation of the control shaft;
• a choke operating portion that is disposed on an outer surface of the housing and is connected with the restriction mechanism via a connection member, such that, upon operation, the choke operating portion drives the restriction mechanism in a direction in which the minimum opening degree of the choke valve decreases;
• and
• a negative pressure mechanism that is driven by a negative pressure generated in the intake system or a crankcase of the engine during an operation of the engine to cause the control shaft to rotate in a direction in which the minimum opening degree increases within the range of rotation restricted by the restriction mechanism.