This was the exact replacement for the carburetor that had gone bad. All I had to do was, using the old carefully removed gaskets, was to bolt on the new one and connect the links and fuel hose. No adjustment was needed and after a couple of pulls on the starter rope, it fired up and ran flawlessly. I ordered from Jack's because they were the only ones that provided exact model, engine and part numbers to get the proper one. Excellent, product, and dealer service, I could not be happier!