The Murray 7079193YP Lawn Mower Solenoid Starter controls the flow of electrical current from the battery to the starter motor during engine startup. This component mounts within the electrical system and connects to the ignition circuit. It works by acting as a switch that engages when the key is turned, allowing current to reach the starter motor and crank the engine. Once started, it disengages the circuit. Replacing a faulty solenoid restores reliable starting operation.