I've had a little bad luck rebuilding the Walbro HD type carburetors lately. First one was on a Poulan 3400. Everything went ok until I installed the "O" shaped gasket on the inlet needle side. That was an HDB, if I remember correctly. Anyway, two of those gaskets were in the kit and I guessed the wrong one first and it ran terrible rich. The next one, today, was an HDC on a Homelite XL2. There were also two gaskets in the kit but neither looked like the one I took off. Well, it ran really rich with the one I chose. I got in my spares and found one that looked different than the others and am going to try it tomorrow. I hate it when they make the kits to fit multiple carb. applications.