Patent ID: 7762787

Claim:
An engine driven type of working machine which has a pump driven by an internal combustion engine and a discharge device for discharging liquid ejected from the pump, the engine driven type of working machine comprising: a starter-motor generator which is coupled to the internal combustion engine, the starter-motor generator acting as a starter motor driven by an electricity supplied with a battery during startup of the internal combustion engine, the starter-motor generator acting as a generator for charging the battery during operation of the internal combustion engine; a switch configured to be actuated by an operator which generates an operation standby state and an operation state of the discharge device; a unit which detects the operation standby state and the operation state of the discharge device; and a control unit provided with a microcomputer which stops the internal combustion engine from operating while in the standby state in which said liquid is not discharged, and starts up the internal combustion engine while in the operation state to drive the pump to eject said discharging liquid therefrom, wherein the switch is a standby switch which is configured to generate the operation standby state when the standby switch is at a position corresponding to a predetermined holding position, and to generate the operation state when the standby switch is at a position moved off the predetermined holding position, and wherein the starter-motor generator acts as the starter motor to start up the internal combustion engine responsive to the position of the standby switch.