Hi folks, I’ve got a 110cc kids quad for my son, had issues with the carburettor overflowing, got a replacement and it’s still overflowing, the float is operational.
In neutral it starts and then revs high and stays high, I’ve fiddeled with the air and fuel settings which seemed to bring the revs down but make the carb overflow more! Also the spark plug looked a little sooty and a bit of black smoke (probably down to incorrect settings but thought I’d mention it anyway)
I’ve tried turning the throttle to the max and to the minimum on the adjustment screw on the thumb throttle.
any help would be much appreciated, I’m not very good with engines and this is our first quad, my sons pretty disappointed not to be riding it on half term, thought I’d try for advice on here first before sending it off to a specialist
many thanks
sam

thanks for the reply! Could you tell me how to adjust the height of the float? I’m able to do a test, I just need to find some clear tube! Many thanks

also how do I check/ adjust the valve clearance?

You Tube

thanks, I’ll check the levels and let you know!

just fuel out of the pump at the garage mate, same as the lawnmower

I’m managed to stop it from overflowing, struggling to get it to start now but when it does it revs really high without any throttle, turning the fuel down on the side of the carb does nothing to help it, the throttle lever feels like there’s not much resistance! Think I’ll have to send it to a mechanic