Had a Marvel that sat untouched outside for 35+ documented years.
For all intentional purposes it should have gone on the scrap pile. (actually it was on a scrap pile when I got it)
Could not even get 1 screw to turn, broke 2 trying.
Put it in a big pot outside on a hotplate and cooked at a slow boil for an hour in a water and rad cleaning solution (oxalic acid)
Pulled it out and rinsed it in a baking soda and water bath to neutralize the acid then rinsed in clean water.
It cleaned up great, all the screws came out like they were put in yesterday.
The two I broke the heads off of unscrewed with a pair of pliers and no effort.
I was dealing with brass, steel and aluminum and contrary to what others say there was no problem with the solution eating anything away, granted this carb was built well to begin with.
Proceed at your own risk, just sharing what worked for me.
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Today's Featured Article - Uncle Cecil's Super A Lives Again - by Mike Purcell. A week or so out of most of my childhood summers was often spent with my Uncle Cecil and Aunt Sissie in the small East Texas town of Maydelle on their 80 acre farm. Some of my fondest memories of these visits are those of learning to drive a tractor at the helm of Uncle Cecil’s 1948 Farmall Super A. Uncle Cecil was the second owner of this wonderful little tractor, but it was almost as though he had adopted an infant. The original owner was a man from Minnesota who bought her from a local dea
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