Hello, all. looks like a great site. I have a tecumseh hm80 on a snowblower, I completely rebuilt the carb, but it still wont run, I dont know how to describe it. The primer bulb gets rock hard, I mean it wont pump anything, almost like the carb is vapor locked, I can tap the carb it will let me get a half push in to prime and it will run for a second then dies with bulb getting rock hard again, The carb is clean, new needle, seat, float, orings, gaskets. PLease help me!