The fuel cock is a small but important part of your SYM 125 Jet Power scooter. It controls the fuel flow from the tank to the carburetor, ensuring smooth engine performance. Over time, this part can wear out or start leaking, which leads to fuel delivery problems. In this guide, we’ll show you step-by-step how to diagnose the symptoms of a bad fuel cock and replace it with a new one.
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| Fuel cock replacement. |
Symptoms of a Faulty Fuel Cock
Before jumping into replacement, here are some signs that your fuel cock might need attention:
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| Fuel is leaking underneath the scooter. |
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Engine stalling or hesitation due to restricted fuel flow.
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Hard starting, especially after the scooter has been parked for a while.
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Strong smell of petrol near the scooter.
If you experience these issues, it’s a good idea to check and replace the fuel cock.
Removing the Fuel Tank
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Remove the flange bolt securing the fuel tank.
Remove 2 flange bolts. Disconnect the fuel unit connector.
Disconnect the fuel unit connector. Detach the fuel tube and vacuum tube from the fuel cock.
Remove fuel and vacuum tubes.
Removing the Fuel Cock and Strainer
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Use an adjustable plier to remove the old fuel cock.
Remove the fuel cock. Use long-nose pliers to remove the strainer.
Remove the strainer.
Installing the New Fuel Cock
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Take the new fuel cock and strainer set included in the box.
Install the strainer and secure the new fuel cock in place. Reinstall the fuel tank in reverse order of removal:
Reconnect the fuel and vacuum tubes. 
Reattach the fuel unit connector, position the tank back, and tighten the flange bolt
Testing the Repair
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| Start the engine to confirm smooth fuel flow. |
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| Check for any fuel leaks. |
If everything is working fine, the job is done!
Conclusion
Replacing the fuel cock on a SYM 125 Jet Power scooter is a quick and straightforward repair that helps prevent fuel leaks and keeps your scooter running smoothly. With just a few tools and careful steps, you can complete the job yourself.
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