Gas is flowing out of the hose from the carb after using the throttle.
I have drained the bowl a couple of times which helps stop the flow at idle, but pin the throttle and it flows.
Any suggestions?
Thanks

 

It sounds like the float bowl is overfilling and the fuel is flowing out of the overflow line. Possible culprits; the float is out of adjustment or there is some debris caught in the float seat which is not allowing it to seal properly causing the overflow condition.

 

Thank you for your analysis. Is there anything I can do (with limited experience) or should I take it to the shop?
Thanks.

 

It depends on how comfortable you are with pulling the carb off and working on it. It's pretty simple and not too complicated, but you can get in deep if your not careful. If the quad had been running fine without leaking and then just suddenly started under normal riding conditions, I'd suspect debris in the float seal. It's also possible that the float could be cracked and it's full of fuel and won't float which will cause the same condition. If you decide to work on it yourself, pick up a manual if you dont' already have one.