Hello, recently I went to repair an old Solo trimmer, it has been sitting for some time and wasnt fully drained of gas. When started it only runs on choke, you can rev it up. I have cleaned the carburetor and tried messing with the mixture screws. I have noticed that the gasket that connects the small block after the carburetor to the engine is a bit torn, could this be the source of my problem? and what are the other causes?[br]