Hey guys, I've got an Echo CS600P. I let my wifes cousin borrow it, & it came back to me with a broken chain adjuster (he tried to tighten the chain without loosening the lock nuts) & it's running like crap. I've tried adjusting the carb & the idle control but I just don't know enough about carbs to get it right. What is a good starting point for me ? Should I run the low & high screws all the way in & then back them out 1 full turn & go from there ? Where should I set the idle screw at ? My buddy tuned my saw for me when it was new, he trimmed the limiter tabs off the adjuster screws & set it up so that it ran flawlessly. But my wifes idiot cousin told me he was turning the screws because he couldn't get it to start up (idiot ran out of gas & didn't realize it). So now I have no idea where to begin with the high, low & idle screw settings. Can somebody please point me in the right direction. My buddy that set it up the first time has since moved to different state.