Stihl FS-61 / won't run at high speed
I have a Stihl FS61 trimmer. I have replaced the carb with a Walbro WT-38-1. The original carb had the choke lever on the air cleaner cover. This carb has the choke lever included on the carb - the little tube on the side. I have been trying to adjust the high speed jet to no avail. I have replaced the flange gasket also. When the trimmer starts at idle, the trimmer "chokes" and dies when increasing the speed. . I leave the original choke lever - the one on the air cleaner - open and use only the choke on the new carb when attempting to start. It dosen't seem to matter how the high speed jet is set. Appreciate how the high speed should be adjusted starting from the beginning. Idle jet closest to the engine, high speed jet closest to the air filter. Is this correct? I removed the fuel filter from the tank so fuel flow should not be a problem. Replaced the fuel line. The on/off fuel lever was broken so I re-drilled the fuel opening in the on;off lever and made sure it is completely open when being re-installed. Ideas would be appreciated. Could it be that the flange gasket is not installed correctly?