TJG wrote:thanks guys. there was a large piece of rust in the gas tank fuel outlet.
You came so close to solving the problem yourself. You mentioned before the carb rebuild it was leaking so it needed a rebuilt anyway.
If your gas tank has rust crust bouncing around in it, you may want to consider sticking a magnet on the bottom outside of the tank to attract and collect the rust.
I've always considered dropping a magnet that I could later retrieve inside the tank but never have found one I could get a grip on to remove later if it got coated with rust or didn't work out