This saw has ran fine for 11 years and now no spark. It started cutting out doing some limb trimming after a storm. Then I was cutting up some 6" limbs that was already down and it would just quit for no reason. Would get it to restart after those so called PULL-ons forever lol. This saw has always started on 2nd pull. Do you think it could be just a magneto problem? Not so good with the trouble shooting yet. Thanks.