I have a Tecumseh Power Sport OHH60 that I recently got out of the trash with a American Flyer chassis. The problem is the motor starts off strong in when you first start it up and idles strong for, about 30 seconds, then it gets to the point of ALMOST stalling, but comes back to a strong idle. After this goes on for about 5 minutes it finally levels itself out. But when you give it gas( press the gas pedal) it just stalls itself. I have replaced the fuel bowl and all its respective gaskets and still did not fix the problem ( that is why it was profusely leaking gas EVERYWHERE, but I got a new bowl and gasket and it fixed all of those problems). I am at a loss of what to do/ why the motor is doing what it is doing. Any help will be greatly appreciated!