Hello Hntrsr. As I've posted above, on these newer models, the float level cannot be adjusted by bending a tang like in the old days. The setup is plastic and 'set' as it is. I have figured out that the float evidently is not the problem as I originally thought. It is working as it should. I finally decided to take the airfilter off, look down the carb throat and make sure all was well. I then tried successfully to start the engine, and it ran normally, as it should; but with the new airfilter removed. I put the airfilter cover back on and mowed my lawn without problems. Even though I know it is certainly not the best thing to do, I'm going to run it like that from now on for the rest of the summer and then see if I can get it worked out this fall.I would make certain the float is closing the needle valve. Make sure the float is horizontal. It is alright if it is a little higher than horizontal but if it is lower than horizontal the needle valve will not seat. Bend the tab under the needle valve to adjust.
We need the model and type number as well, look around the valve cover, it should be etched or stamped into the metal.
Try installing the air filter, but just lightly tighten the screw. Running with no filter will greatly shorten the life of your engine.