I have a Stihl FS 76 and it's worked great over the years however this year I began having problems with the carb. The priming bulb wasn't picking up fuel so I installed a new carb kit and it seems to have helped. The problem now is that I can get the engine running and it runs well even at full throttle while it's sitting on the ground. It's not until I pick it up off the ground that it begins to sputter, almost like it's starved for fuel. I checked the fuel filter in the tank and that isn't the problem. Anyone have any ideas why the engine would only starve for fuel when I pick it up? I'm at a bit of a loss.