In the picture:

#2 is one end of the carb attachment bolt. This picture makes me think it's a draw-bar type, which means that on the opposite side, there is a little nut. make sure this guy is nice and tight, useing threadlocker is a good idea. Push down on the carb when tigtening it to make sure the gasket/o-ring is compressed.

#1 points to the o-ring where the carb mounts. The little black line there is the o-ring. If the fuel is coming from here, the carb is loose, tighten as in #2

#3 points to two places where fuel might come out if it was a problem with the front bearing.

I didn't highlite the fuel tubing and nipples, but you'll want to check those as well.