I'm currently using, an older, straight shaft echo that I dug out of the dump. I brought it home, checked for fire, put a new plug in. The compression felt good. Tried to start but, as I've found before, there was a mud-dobber nest in the exhaust. Cleaned it out, and it fired rite up. I've worked on others that was plugged with carbon.
I also have and keep other brands on hand for parts. It has saved alot senseless trips to town.