Originally Posted by dutch1
Ed, the quality dip type carb cleaner disappeared off the shelf, my best guess, 15 to 20 years ago. I don't even remember the name now, but as I recall it was a very alkaline(lye) solution. It cleaned up varnish and crud in short order but you didn't want to leave a carb with plastic parts in it for an extended period of time. More than likely, EPA regs caused it demise. Have tried a gallon of Berryman's and NAPA's stuff--not impressed. Since then, it's air and the cheapest brake cleaner I can find. Some of the old heads will recall the good stuff.
Hell yeah, the old stuff would take the finish off and diisolve a carb if you left it in too long. only brass floats survived. Rough on your hands too. too many numbnutz dumping down the drain helped eliminate it. Nothing as good since. Even Gumout spray doesn't seem to have the same zip.