The Starter Motor (part number: 4983774) is an essential component of a truck’s engine, responsible for starting the combustion process. It is an electric motor that converts electrical energy into mechanical energy to turn the engine’s crankshaft and start the vehicle. When the ignition key is turned, the starter motor engages with a gear on the flywheel and rotates it to initiate engine operation. The starter motor draws power from the battery and requires high current to operate, but only for a short period. Once the engine starts running, a solenoid disengages the starter motor from the flywheel to prevent damage to both components. A malfunctioning starter motor can result in slow or no cranking of the engine, which may indicate issues with other parts such as battery or alternator.