Stihl ms251 ran great until just around a year ago went to use it one day, pulled the cord and cannot get the Cord to catch. I’m assuming something is messed up with the Pull cord assembly so the cord will not catch. Has a brand new bar and chain never used. Chainsaw ran solid has been sitting for right around a year. I have no use for it at the moment. Seems like a easy fix for someone that repairs these things