# Starter clutch

> The starter clutch is a one-way clutch that passes the starter motor's drive to the crankshaft and freewheels once the engine fires.

- **Also known as:** Marş kavraması, Tek yönlü rulman, Sprag clutch, Marş rulmanı
- **Turkish term:** Marş rublesi
- **Category:** [Starter Clutches](https://motorsikletparcasi.com/en/category/starter-clutches)
- **Page:** https://motorsikletparcasi.com/en/glossary/starter-clutch

The starter clutch usually sits behind the [flywheel](https://motorsikletparcasi.com/en/glossary/flywheel-magneto) and contains rollers or sprags that lock in one direction only. Once the engine runs, the crank spins faster than the starter gear and the clutch freewheels, protecting the [starter motor](https://motorsikletparcasi.com/en/glossary/starter-motor).

## Symptoms of a problem

- The starter spins freely (whirring) but the engine does not turn
- A metallic clatter or slipping noise when starting
- Rattling from the flywheel side while the engine is running

## Related terms

- [Starter motor](https://motorsikletparcasi.com/en/glossary/starter-motor): The starter motor is a small DC electric motor that turns the crankshaft using battery power to start the engine.
- [Flywheel magneto](https://motorsikletparcasi.com/en/glossary/flywheel-magneto): The flywheel is the heavy rotating disc on the crankshaft that carries magnets; with the stator it generates electricity and smooths engine rotation.

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- Source page: https://motorsikletparcasi.com/en/glossary/starter-clutch
- Last updated: 2026-10-09
- Türkçe sürüm: https://motorsikletparcasi.com/sozluk/mars-rublesi.md
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