What is the role of the starter in an engine?

The starter's primary role in an engine is to initiate the engine's operation. When the ignition key is turned or the start button is pressed, the starter motor engages with the flywheel of the engine. This engagement causes the flywheel to turn, which in turn rotates the engine's crankshaft. As the crankshaft turns, the engine begins to go through its compression stroke, allowing fuel and air to enter the combustion chamber. This process is essential for igniting the air-fuel mixture, ultimately leading to the engine starting and running on its own.

The other functions listed, such as keeping the battery charged, circulating oil, or cooling the engine, are done by other components such as the alternator, oil pump, and cooling system, respectively. These components play crucial roles in ensuring the engine runs efficiently and is maintained but do not directly involve the starting process managed by the starter.