JW - it is a short question, with a VERY long answer!
It all depends on the metal of the carburetor. Example, hot caustic lye does a great job on cast iron, but if you put a piece of aluminum in the tank, it will melt. But you won't see it, as you will be lying face down on the floor.
I am going to make NO suggestions other than READ THE LABEL!!!!!
Jon.
