Recently went to start a Sachs 117 that has been sitting for 4 years because of a medical condition. Saw won't start. Little fuel down carb and she fired right off. Idled and ran without any problem. Thought about removing it and shooting it with some carb cleaner and decided to go for it. Reinstalled carb and now no start no matter what I do. I know from many past failures I caused the problem but what did I do wrong? All I did was remove the top and bottom covers and spray away.