tune

I am wanting to buy a Echo cs-590 for general purpose. I purchased a small lot with a bunch of mulberry trees that need to be removed. I am in my small town small engine repair shop and the owner wants to sell me a 590 with 18" bar. I told him I want to buy one with a 20" bar. He said he'd sell...

My 192 was running rich and the screw was at the limit, so I removed the cap and kept screwing the H screw in until it stopped and it still only got to 12,800rpm. Why is it doing this? Something wrong with the carb? I was having issues with it on Friday; I think it was loading up on fuel and...