Ive gotta 310 (stihl) about 10 yo with light use til I got my stove 3 or 4 seasons ago. Its still 'light' used compared to most of you all, about two cords a year from tree to stack. Chain/bar oiler is not functioning and I wonder if anybody has anything on this. I ran a torch tip cleaner up in all the holes I could find and blew it all out, just from the removed bar area. But I think maybe I need to go farther in. Any ideas before I have to hire it out ?