Which component is responsible for starting the engine?

The starter motor is the component responsible for starting the engine. When the ignition key is turned to the "start" position, the starter motor engages with the engine's flywheel, initiating the crankshaft's rotation. This action creates the necessary conditions for the engine to begin its combustion cycle, allowing it to run.

The starter motor receives electrical power from the vehicle's battery and uses this power to drive the engine's flywheel, which in turn helps start the engine. It operates for only a short period while the engine is being cranked and is designed to withstand the brief high-current demands required to start the engine.

In contrast, while the alternator generates electricity to power the vehicle's electrical systems and recharge the battery, it does not initiate the engine start. The ignition coil is responsible for generating the high voltage required to create a spark in the spark plugs, facilitating fuel combustion, but it does not start the engine. Lastly, the fuel pump delivers fuel to the engine but is not involved in the actual starting process.