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'10 YZ250F CARB PROBLEM - DRAIN SCREW

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I have weird problem where my drain screw for the carb bowl is constant leaking. Not the 17mm nut but the little fuel screw, that hose is

constantly dripping fuel with my screw turned in all the way. I looked inside and the threads dont look stripped but as soon as I turn the fuel petcock on that hose from the drain plug keeps leaking. I ordered a new screw but cant figure out why it would leak if the screw is turned in.

I also took the float off and cleaned the needle valve thinking that was the problem. Any ideas thanks.

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Float is set too high. Try lowering it and see if that solves the problem. Float bowl overflow shares the same tube as the drain. Another way to see if it is the float is turn the gas off at the tank. If it is the float it will drain off just the amount of fuel that was in the transfer line. If it is the actual screw then it will leak until all of the fuel in the bowl is gone.

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