Metal treatment for carburetor rebuild?

pmarkel · Sep 2, 2016

I am currently rebuilding the carburetor on my 1948 John Deere B. After removing all pieces and plugs from the carb I soaked it in a bucket of gasoline for a day and blew it out with a compressor. Now I have it in a bucket of carb cleaning solution to soak for a day or two. I noticed during dis-assembly that the carb had some minor rust inside. After cleaning with the carb solution, is there any additional metal treatment that I should apply in order to prevent future rust or is a little rust unavoidable? Thank you for your time.

Sincerely,

Peter Markel

greenmech · Sep 3, 2016

I would think if you drill cleaned all the passages it would be fine. Ron Mn

David G · Sep 3, 2016

I just soaked a rusty carburetor in vinegar, rinsed, dried and soaked in caustic cleaner, looks really good.

fixerupper · Sep 3, 2016

About the only way to avoid rust inside the carb is to avoid getting moisture in the carb as much as you can. In most areas of the US keeping condensation out is darned near impossible but we do have ways to keep it to a minimum. Keeping some sort of water emulsifier in the gasoline helps keep the water from pooling in the bottom of the tank or sediment bowl or carburetor. Ethanol (gasp) works as an emulsifier in most parts of the country or if you don't like ethanol, Heet will work too. When the tractor is stored, shut the gas off and open the carb drain and leave it open so condensed moisture inside the carb can drain out as it condenses. Keeping the gas tank full solves the gas tank condensation problems but if you do that you will have a tank full of old rotten gasoline to deal with when you put it back into service. If you are using the tractor all the time keeping the tank full is a good thing.

Mike(NEOhio) · Sep 3, 2016

Evapo-Rust would take care of that. Slow but works very well. It doesn't penetrate frozen parts but takes rust off the surface. Water soluble, non-toxic, non-acid. Doesn't harm paint of plastic.

CP1 · Sep 3, 2016

(quoted from post at 03:04:09 09/03/16) I am currently rebuilding the carburetor on my 1948 John Deere B. After removing all pieces and plugs from the carb I soaked it in a bucket of gasoline for a day and blew it out with a compressor. Now I have it in a bucket of carb cleaning solution to soak for a day or two. I noticed during dis-assembly that the carb had some minor rust inside. After cleaning with the carb solution, is there any additional metal treatment that I should apply in order to prevent future rust or is a little rust unavoidable? Thank you for your time.

Sincerely,

Peter Markel

I just rebuilt a B carb for the local high school Ag class. It was rusty and dirty and after getting the years of grime off I still wanted to get the rust gone. I used Muratic Acid and it turned out almost like new... But ifyou use that be extremely Careful!!! There are fumes and even the fumes can rust other metal close by. Don't leave on very long and scrub with a toothbrush. Rinse with baking soda water and dry. It will rust quick again if you don't dry and spray with something oily. Just be sure to clean outside with gloves if you use Muratic Acid

Lon in NE · Sep 3, 2016

Anybody ever boil a carb in phosphoric acid? I guess it"s supposed to make a coating like the bluing on a rifle.

Metal treatment for carburetor rebuild?

pmarkel

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greenmech

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David G

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fixerupper

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Mike(NEOhio)

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CP1

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Lon in NE

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