Hi all, I just bought a 1981 6216 with a 16hp briggs. The carb was filled with some kind of white dried stuff. I soaked everything in vinegar cleaned with scrub brushes and passed wire ties through all the ports. Finished with sprays of carb cleaner to verify everything clear. I tested the float and it is functional and not leaking. I replaced the needle and seat and adjusted the float to level. I have fuel leaking into my crankcase still. I keep reading that the problem has to be the float, needle, or seat. I attempted to pull the old seat with the 1/4 tap and bolt method and failed. I ended up carefully drilling the old seat out. I know I hit some aluminum but not much, the new seat fit very snugly. So snugly that I slightly damaged the upper rim (didn't have the right tool either). I believe this is not the sealing part of the seat and a very slight ream on top edge now allows the needle to slide freely in the seat. I'm guessing I messed up and will need a new carb but can't find the part number. Let me know if you guys think I can save it. Also another potential problem, I suppose I ordered the wrong carb kit, everything fit and lined up perfectly except the fuel pump valve springs were too small. I ordered another fuel pump kit and replaced those. Is it possible the seat and needle are wrong but still fit? I still don't see how so much fuel could be getting by so quickly. Thanks guys