Nate, You done a great job on that 5200. I'm certainly no expert on these, so just grasping for something that might be amiss. Assuming it doesn't have an air leak. Sounds like it might need to be richend slightly. The 1 turn out on the needles is just a starting point, not necessarily where they end up. ? Maybe where you had it set was good, but clutch springs might be weak, letting it slip. ? Does yours still have the governed carb? That possibly could be acting up I suppose. If it does, you can block them off. Or do like I did on one of mine. Just put a carb from a 4200 on mine. They don't have a gov. Same carb though.
I think I would put the saw in some good size wood and run it some. Get it warmed up and try setting the needles.
Gregg,