She was running lean due to the cracked boot from the carb to the intake port. She started to feel 'tight' when running full throttle on the large Ash removal mentioned earlier. I stopped using it, gave her a real good cleaning and tuning, but she wouldn't run at idle. Exhausting my knowledge I took it to the dealer, it would run, and they said she's a parts saw, due to scored piston and cylinder. The saw is not that old, bought spring 2004. I already bought the replacement, can't work without one, and I thought if it was worth it I might have a pro put it back together with a bit more attitude.