It sounds like a few of you are having some problem drawing fuel, and I hate to see you drilling into the backplate to install a pump that you may not need. Check to see that your tank level is inline with the Carb, and not high or low. The centerline running horizontally thru the tank, should be located about 1/4" - 3/8" below the spray bar.

Both of mine have been running beautifully for years, with none of the symptoms described above. I think that you might be having plumbing problems. And I never heard anything about a new Carb, nor does it need one.

Jim