After you have a carb apart, there are a couple of simple tests that can be done to verify the basic operation of the carb before reinstalling it. First test is to pressure test the inlet, if it will hold about 8psi you shouldn't have any flooding issue with it. To make sure the inlet valve and control diaphragm are working properly, keep pressure on the inlet port and then with the choke and the throttle held open, bring a shop vac nozzle up to the engine end of the carb, the shop vac will simulate engine intake vacuum and the inlet pressure should drop as the diaphragm responds to the vacuum and opens the inlet valve. CAUTION HERE: Only do this with a carb that doesn't contain fuel, if any fuel vapors get to the brushes in the vac motor things will get exciting.