I started a thread a week or so ago about modding my cheapo weed eater, the mtd. Well I went to pull the muff and looks like I with will have to take the whole plastic cover off or cut some of the fins to reach through them with a screw driver or socket to unbolt it, the muffler that is. That's not the big deal, the problem is that I have to have a special carb tool that has about 1/3 of the circle removed. Cause I don't have this I put it off till I can find one. Now to the echo. This is my bigger stronger trimmer. The Carb diaphragm or something g busted end of last season so I had to rebuild it this summer before it would even crank or run. Did it and now runs. It has always been cold natured. Like have to feathers the throttle till its warm or else it will stall. Once warm it will idle and grab it to wot and back to idle, and will stat ideling. I wanted to try and adjust the Carb to see if I could fix this cold natured issue. But there no adjustments on it, other than an idle stop. Is this normal?