Basic Operation. Basic parts of the Starting System.Battery - Supplies the energySwitch - Activates CircuitSolenoid - Engages starter motor to flywheel.Starting motor - Drives the flywheel to crank the engine.. Basic Operation. When the starter switch is activated a small amount of current flows from the battery to the solenoid.The solenoid performs two functions.Engage the pinion gear with the flywheel.Close the contacts between the battery and the starter motor. .