Fuel flow

In addition to what Jerry said, my TO had an aftermarket fuel bowl that had a screen on the end of the fuel inlet in the fuel tank. That screen in the gas tank was partially clogged. I had to remove the fuel bowl from the fuel tank to clean that screen. If you have something similar, you may have to do the same. I am not familiar with the TEA's, but if your fuel tank has a vented cap, the vent may be clogged. WHile draining fuel from your carb, remove the tank cap to see if it drains faster.

George

I'm not familiar with the TEA's but the TO's had a screen in the inlet elbow to the carb and some had a screen at the inlet to the tankvalve/sediment bowl. I don't know if yours has these also. Make sure the vent hole int the fuel cap is clear and that there are no kinks in the fuel line itself. Finally, there the float setting and float valve . Sometimes fine sediments fill the fuel bowl and harden up . they don't allow the float to drop all the way. Sometimes the floats hangup because of float pin wear and rubs on the sides of the fuel bowl and restricts the fuel. A sharp rap on the carb with a block of wood will temporarily free them.
These old machines sat in a pile of blackberries in the north 40 for twenty years and their fuel supply systems are full of crap, corruption, and rust. Some of that ends up in the screens and the fine stuff makes it to the carburetor.