I recently acquired a 1972 Attex Crazy Colt it had been sitting around 4 a while, I drained the gas and wired it up. A couple of days ago it would run 4 about 10 minutes get hot and shut off. Today I go to run it and it started and ran 4 about 10 seconds and died. Its almost like starting it and running it with the choke on and it floods but the choke is not on. I need some advice in what direction I should go to track down the problem.