Starter system for engine

A starter system comprising:

• a starter motor configured to start an engine rotationally;
• an electronic control unit configured to control the engine;
• a battery that supplies a current to the starter motor;
• a starter switch capable of supplying the current of the battery to the starter motor in response to an operation by a user;
• a first circuit that supplies a starter signal indicating that the starter switch is operated to the electronic control unit;
• a second circuit that supplies a current necessary for driving to the electronic control unit, wherein the electronic control unit starts a control operation of the engine when there are both of the starter signal input from the first circuit and the current input from the second circuit, wherein the start of the control operation of the engine includes an operation of outputting a current supply command for supplying a current from the battery to the electronic control unit, wherein the first circuit includes a signal supply portion that supplies the current of the battery as the starter signal to the electronic control unit in response to the operation of the starter switch, the second circuit includes:
• a startup time current supply portion that supplies the current of the battery as a drive current necessary for driving the electronic control unit in response to the operation of the starter switch;
• a post-startup current supply portion that supplies the current of the battery as the drive current necessary for driving the electronic control unit after the starter switch is operated;
• and a switching element that is interposed in the post-startup current supply portion, the switching element being controllable to switch the post-startup current supply portion between a conductive state and a disconnected state, and the electronic control unit outputs a command for controlling the switching element to be in a connection state as a current supply command when there are both of the starter signal from the first circuit and the current input from the second circuit.