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With the flywheel spinning at about 1,000 RPM at idle, the starter, if engaged with the flywheel, would be forced to spin between 15,000 and 20,000 RPM. Once the engine has turned over and is running, the overrun clutch will release the starter from the flywheel and prevent the gears from re-meshing (as in an accidental turning of the ignition key) while the engine is running

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10y ago
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12y ago

When starting an engine the starter motor turns the crank shaft via the fly wheel at a set speed. Once the engine is running the speed of the flywheel increases above the speed of the starter motor. To stop the starter motor from being damaged once the engine is running a clutch mechanism is used to stop the flywheel turning/ spinning the starter motor mechanism too fast or 'Overrunning'.

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Q: What is the purpose of the overrunning clutch in a starter?
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