If you are facing difficulties starting your chainsaw, there are quite a number of things that could be wrong. Firstly, check to see if your air filter is clogged. If that is the case, clean it. Replace the air filter if it is worn out. If you use a gas chainsaw and you have not operated it for a while, chances are that the fuel’s gone bad. Take out the old fuel, and replace it with a fresh mixture. If the fuel is fresh, and your chainsaw still won’t start, check the fuel line for leaks and cracks.