is there any sort of list of what wackers have what engines, I just picked up 5 weed wackers from a friend and they are all different brands. one is a craftsman, that must be one of these poulan motors similar to ryobi but a little different. There is a homelite, and two that look similar a john deere and a busy beaver(looks just like the john deere) or something and a weed eater brand. the John deere seems like it might have the echo motor in it!