Why can't I keep my scooter running?

by Carl
(Clarksville, Indiana USA)

I just bought a CHUANL 4 stroke 50cc scooter with 160 miles. When I start it, it won't idle and I have to keep moving the accelerator back and forth real fast to keep it running.

Any idea what I can do to remedy this situation?

Comments for Why can't I keep my scooter running?

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Mar 13, 2016
Idle mix screw NEW
by: JerryTheAnonymouse

Have you checked the idle mix screw? If you have a speedo this will be a lot easier, but i did it without one.

The screw, on the four stroke I have, is close to the bottom of the carb on the right side relative to where the intake is pointing. Turn that screw all the way in, counting how many turns it takes. Then turn the screw back a turn and start it. If it doesn't start, try another turn out again and again until it does start. If it doesnt idle for longer than 3-5 minutes, then turn it a half turn in and see if it does. If it doesn't idle then, try another half turn from the original turn that allowed it to idle, rinsing and repeating. You can look up tutorials for visual aid. Before messing with idle, try using Seafoam to clean it. Peace.

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