My 088 has not been used for a few months. Was working fine. Today it has no spark. I changed the plug to another that was working in another saw. Still no spark. I looked at the magneto and it looked ok, that is no loose wires or burn marks. What can I look at next? I have not been cutting wood this summer so today I started all my saws up and gave them a run and new fuel and bar oil. But this one was not going to play.