Gasoline additive for carb messed up from sitting?

X2 on the Seafoam. Works every time.

Well, I like it and use it a lot including for winterizing the (ahem) GM 4.3 in the boat. Unfortunately it didn't work for my snow thrower this time. Could only get it to run when choked. Had to take the carb off and clean it out in December. What a pisser. Even after running the fuel out completely at storage seems I ended up with some rust around the bowl over several years.