An internal-combustion engine in case of very large engines or other device used for rotating an internal-combustion engine so as to initiate the engine's operation under its own power. The starter motor is used for this purpose and is not required once the system starts running.
A starter (also self starter, self, or starter motor) is an electric motor, pneumatic motor, hydraulic motor, an internal-combustion engine in case of very large engines or other device used for rotating an internal-combustion engine so as to initiate the engine's operation under its own power. The starter motor is used for this purpose and is not required once the system starts running. There is a complete system relating to the starter. It starts with the battery, which a lead runs down to the starter solenoid, then there is a lead from the solenoid that goes to ground. You have a starter relay, which has a wire to the ignition switch, a wire to the solenoid, a wire to the nuetral start switch of the transmission. When the solenoid is energized, it moves a fork inside the casing that engages a gear on the starter motor, the gear moves to the rear to engage the flywheel of the engine, which makes it turn the crankshaft and start the ignition system of the engine, thus starting the car. An idle starter solenoid can receive a large electric current from the car battery and a small electric current from the ignition switch. When the ignition switch is turned on, a small electric current is sent through the starter solenoid. This causes the starter solenoid to close a pair of heavy contacts, thus relaying a large electric current through the starter motor, which in turn sets the engine in motion. When low-current power from the starting battery is applied to the starter solenoid, usually through a key-operated switch, the solenoid closes high-current contacts for the starter motor and it starts to run. A starter solenoid (or starter relay) is the part of an automobile which switches a large electric current to the starter motor, in response to a small control current, and which in turn sets the engine in motion. When low-current power from the starting battery is applied to the starter solenoid, usually through a key-operated switch, the solenoid closes high-current contacts for the starter motor and it starts to run. The solenoid is also responsible for closing out high-current contacts for the starter motor and it then starts to run. Once the engine starts, a key-operated switch is activated and a spring in the solenoid assembly pulls the pinion gear away from the ring gear which then causes the starter motor to stop.  A starter is an electric motor that turns over or cranks the engine to start it. It consists of a powerful DC (Direct Current) electric motor and the starter solenoid that is attached to the motor (see the picture). The starter motor is powered by the car battery. To turn over the engine the starter motor requires a very high electric current, which means the battery has to have sufficient power. Starting system problems are common and not all problems are caused by a faulty starter motor. The electric starter motor or starting motor is the most common type used on gasoline engines and small diesel engines. The modern starter motor is either a permanent-magnet or a series-parallel wound direct current electric motor with a starter solenoid (similar to a relay) mounted on it. The starter motor is used for this purpose and is not required once the system starts running. Hyponyms (each of the following is a kind of starter motor): kick start; kick starter (a starter (as on a motorcycle) that is activated with the foot and the weight of the body). self-starter (an electric starting motor that automatically starts an internal-combustion engine).  A variant on the electric starter motor is the inertia starter (not to be confused with the Bendix-type starter described above). Here the starter motor does not turn the engine directly. Instead, when energized, the motor turns a heavy flywheel built into its casing (not the main flywheel of the engine). The starter motor is used for this purpose and is not required once the system starts running. A starter is an electrical motor that is connected to the battery. The job of a starter is to set the engine (pistons, crankshaft, etc.) in motion when you turn the ignition switch on. Once the engine starts and is in motion, the job of starter is done. 
https://en.wikipedia.org/wiki/Starter_(engine) https://uk.answers.yahoo.com/question/index?qid=20060607034216AABFf5u https://en.wikipedia.org/wiki/Starter_solenoid https://en.wikipedia.org/wiki/Starter_solenoid http://www.carparts.com/starter http://www.samarins.com/glossary/starter.html https://en.wikipedia.org/wiki/Starter_(engine) http://www.audioenglish.org/dictionary/starter_motor.htm https://en.wikipedia.org/wiki/Starter_(engine) https://www.yourmechanic.com/services/starter-replacement
what does a starter motor do