hello I am having trouble with the slow speed needle, when I screw the needle into the carburator it moves around in the hole when turned all the way, I got the high speed needle to seat nice, but having trouble with the slow speed, I am looking on the diagram, that came with the carb kit, niumber 3/4 say I need to put packing washer and valve packing washers. maybe I put the packing washers in wrong???