Well if I went on what I'd seen around here(my area), noone even knows what a file is
. But having been on here a while now, I've seen things folks around my parts are not accustomed to and have grinders most know nothing about(although I'm down a few from a couple yrs ago).
Air leak or a bad plug.
Well...
Your looking and my looking must be two different things, I could have one here next week if I needed one. Good thing all my saws of that series have tops on them though
.
Guess you better buy a newer saw
.
I retired from hauling drywall when I was 42, that ain't no old man's sport either.
Don't run it even if you can tune it out, fix it!