Carbs my carbs are leaking petrol out the overflow pipes some times she will just drip slowly then some times ill put a litre in it will of gone in a less than a minute it is a pain in the A*s

Contact a qualified heating engineer,obviously leaking probably a split expansion tank,get it checked properly before it causes a n electrical fault.

Take bowl off carb,free float if stuck and check fuel inlet needle to see if it closing fuel when bowl full.blow into fuel inlet on carb opening and closing the float at the same time if it stops you blowing then it is working if not then you have found the problem.it will be one or the other. www.thepitstopcardiff.co.uk 50cc lifan aero on the road 999 pounds inclusive 3year warranty

Hi,the way it works is.....petrol gose from tank into filler pipe into carb it fills the bowl at the bottom of carb float rises and shuts off the petrol by means of a inlet valve when float pushes it shut,
so if there is petrol coming out of the over flow pipe from the carb bowl it is iver the valve is worn(can be replaced)or the float is not at the right level(to high) or float has a hole so sinks(get a small container put petrol in it and put float in if it floats its ok)the other thing is the gasket that gose between the bowl and and top part of bowl make shore its not broken,
hope this helped all the best.

Either the float is set to high, you have trash in the lines, or the more likely scenario is the atmospheric vent line is pinched or plugged.

personaly id flush the carb by removing the carb including the needle[rev cable]use an old basin,take out your lowest screw releasing petrol tip the carb rotating it ending up in an upside down position petrol will come out of every in n out let,place to its original position using a bicycle pump afix firstly to your petrol inlet slowly pump air down the pump don;t pull the pump to refil remove the pump put in a blow mode an repeat 3 2 4 times,then repeat on your petrol fill pipe an repeat proseadure ,this workted 4 me goodluck

Usually when fuel is leaking from the over flow tube on the bottom of the carb this means that the float is sticking. Or the float is set to high and needs to be re adjusted. If you are going to take on this job get a service manual.

I’m happy to help further over the phone at https://www.6ya.com/expert/al_e83b1941f9c0f302

had an sv, the pipe running in the tank corroded, and let water in the tank, lots of it., also throttle bodies are injected not carbs

Make sure that the flexible pipe is securely connected to the drainpan, it can come adrift and cause leaking. The way to check this is to make sure everything is dried out completely. Then open the front grill and carefully pour water so that it goes only into the drip pan. Pour slowly so that you do not overflow the pan. If water is coming out on the outside and you have no leaks on the inside, then you can rule out the perished or disconnected drainpipe theory. In this case your unit may be short of refrigerant causing excessive run time and a freeze up of the evaporator.

You have a stuck float in the carb.