Lot of good info here and the bottom line is Seafoam is a good product, but really only works from the inside, ie adding it to the gas. My 11 year old Honda EU2000 was showing all the classic symptoms of needing the carb taken off and cleaned (common with all gas engines) as it would only idle smoothly with the choke slightly on. As a last resort, I gave her a double dose of Seafoam, ran the Honda for a while, let her sit overnight and she purrs like a kitten now. What ever was in the carb, Seafoam took care of it.
