just got a can of Gunk's latest carb dip yesterday, It don't smell mike their "old stuff" but it don't seem to do much either. I wasn't thinking Wal Mart for the Berryman's, forgot about them. The farm store that I got the Gunk from used to sell the Berrymans; the last can of "that" stuff I got from Useless Zone a couple years ago, seems they charged me ~$25.
Gonna have to go see my old buddy at Napa and see if they still got the 2-ish gallon bucket of their old "Mac's" brand That stuff USED to be the best.... Gunk Hydro Seal used to be pretty close too/ this can I got yesterday says on its side, to get that for "bigger" jobs, but I do not see it sold anywhere any more.
last summer there was a post herre about "car-b-que"/ that is boiling them out with lemon juice. I have done a few that way since seeing that post, with mixed results. DO NOT do this in the house on the kitchen stove, it puts off a nasty stench when it starts to boil.
I picked up a brand new propane powered camp stove at a garage sale a year ago (Chinese brand, Ozark Trail if I remember right) that I paid a whole $3 for. It takes the throw a way screw on bottles, one lasts for quite a few carbs.
The 1st one I did, I did on one of my old Coleman stoves, but if you let it boil over it gets a thick heavy black crusty coating on everything. So I don't feel bad sacrificing that $3 China made stove for the purpose.
I have done 4-5 in the current batch of lemon juice, (not at once, LOL) you can use anywhere from 50-50 mix with water, to straight lemon juice, depending on How "bad" your carb is. I use a 3 lb coffee can to soak them in. Usually I top off with water as it boils off but this last time, I poured in a whole fresh quart of juice, I had 2 nasty ones in there at that time, one from an 8HP Kohler (unsure of number) and the #30; the 8HP one was the worst of the 2; after roughly 40 mins in the boiling juice, it made a pretty good dent in the varnish on the carb/ but barely touched the inside of that bowl which I put in there separately; I soaked that 8HP one in the fresh vat of Gunk mentioned above/ as the 1st carb done in that new can of solvent, and it finished the cleanup on the carb quite nicely, but didn't touch the 1/16" thick layer in the bottom of the bowl or on the float. deposits. I've done ~10 or 12 this way so far, since seeing that post.
I usually get 4-5 carbs out of 1 jar of lemon juice. It's cheap and sure don't seem to "hurt" anything....
I have "just" that bowl in the Gunk right now after I scraped as much as I could out of it with a flat screw driver. Will look in on it tomorrow after I drop the Durango off at the glass shop for its new windshield.