Have a 1020 that idles good when you start it, and warm. But after making a long cut in big wood, at the end of the cut it barely idles or quits. I''ve tried richening the lo jet, and Leaning the lo jet. I also fiddled with the idle adjustment on the third screw. Where is the sweet spot for the idle adjustment, and how does that screw work. I know there's a hose hooked up to it underneath the air cleaner cover! Does it matter if there is a hose hooked to this. Or can it be left open? Please let me know if any of you have any experience with this saw! Thanks ahead of time!