Cleaned the carb and something strange is still happening!
Well, I just got this small 1.75 kw generator from 1979 from my neighbour.
It had decades old gas in it and it gummed up the whole fuel system.
The varnish seemed to prevent it all from rusting out as bad as it looked before cleaning.
Other than that everything inside and out looks great for a unit that old.
The stench was unreal and solvent, carb cleaner, or break cleaner would not pull the stench off that thing!
I saw something on line (YEAH, I KNOW) about white vinegar taking the "Old Gas into Varnish and sludge" smell out as well as cleaning the aluminum.
Well, I dump 1/2 gallon of vinegar into an old plastic milk jug with the top cut open, drop all the carb parts in to it and head off to bed.
8 hours later it was bubbling, not like boiling water, but actively bubbling and fizzy.
I pour it out and run water over it, scrubbing with dish soap and warm water.
There was this gray powdery residue caked on it and it is a pain to get off so I scrub it first with comet cleanser, then used baking soda to scrub it with a tooth brush.
Some places I need to use a razor blade and wire brush to get it off.
It also smudges off on my hands as I clean and scrub it, so have to re-scrub to get my hands clean.
Well, here is the issue.
It was shiny aluminum on all the spots I worked on earlier today but tonight when I go back to keep working on it, that gray powdery coating is coming back and it is once again that dull gray color all over.
Is the full strength vinegar still reacting with the aluminum even after washing it with water, soap, comet, and then baking soda?
If so, how do I stop it before it melts away?