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I have a tecumseh hs40 motor and its actually on a gocart. I just recently started to play with it after a good while and took carb all off and cleaned everything. I put new gas in and tried to start it. But after a few seconds gas started to shoot out a small "vent like" hole a little above the bowl.. Not sure how everything really works but it has never done that before... Any help is appreciated..
 

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Sounds like the float or needle is not functioning properly. If it is a brass float there might be a pin hole in it causing the float to fill up with gas and not raise to stop fuel flow as it is supposed to. If you remove the float, shake it to see if there is fuel in it. You can also tell if there is a hole by drying the float off and look for fuel to seep out of the possible hole.
 
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