OK I needed to use the saw so I cleaned everything up, put some threadlock on the H and L needles being careful not to get any inside the carb. Started it up set the needles and let it sit overnight for three threadlock to cure. Tried screws in the morning, can move them but they are much tighter. Did some final adjustments then added some epoxy on the screw heads and inside the little cover that goes over the screws, let that set up. Saw now runs better than it has in 10 years.
I do have a cheap China carb for husky 272 on the way to try with some modifications of course.
Sent from my SM-T330NU using Tapatalk