My carb was warped beyond repair. The middle section developed a crack at the Tps and was warped. So I got a reman from National Carb. It was somewhat dialed in, so would start and run, but all these engines are slightly different so any of them will require a little further tinkering possible. But, it came with a brand spanking new fuel filter already installed.
My point being, you may or may not have a new filter, don't see why you wouldn't from Nat. Carb, so any and all of that junk/dirt could possibly be leftover in the lines. Which means without a good flush of the feed And return lines, as clean as your tank started out, there's a possibility it's now got a bunch of junk in it. Depending upon whether the return line is a culprit or not.
My point being, you may or may not have a new filter, don't see why you wouldn't from Nat. Carb, so any and all of that junk/dirt could possibly be leftover in the lines. Which means without a good flush of the feed And return lines, as clean as your tank started out, there's a possibility it's now got a bunch of junk in it. Depending upon whether the return line is a culprit or not.