I use the Sta-bil Marine in the blue bottle.
I had to replace the carb in my Echo hedge trimmer a couple years back. It was actually cheaper to buy a whole new carburator than to rebuild it.
This was a machine I used two days a year and then set it on the shelf in the barn. I pulled it out a year later and could not get it to run. I had left the fuel in it for the year. After that I now run all my 2 stroke machines dry when I put them away.