How to prevent cast iron carburetor flash rust/internal

Posted by Mnethercutt on December 11, 2023 at 08:41:58 from (57.140.108.46):

All,

I've recently acquired 3 new (to me) tractors that have all sat for a considerable amount of time. As part of the repairs I plan on going through the carbs and soaking them, along with the carb for the tractor I've owned for a while. The way I do this is to spray down any stuck parts w/ PB blaster, disassemble the carb, and then I use an ultrasonic cleaner to clean the parts. The concoction I have in the cleaner is a mix of white vinegar (to get after rust), ATF, and acetone. It works GREAT at cleaning the parts. The issue I'm running into is after removing the parts, rinsing them off, drying, and starting reassembly, the parts start to flash rust within a few minutes. While I plan to paint the exterior of the carburetor, my concern is that rust forming on the inside will plug up jets and prevent the needle from seating properly. I can try and coat the inside and passages with oil but its difficult to ensure that it gets everywhere and I'm unsure how long it will realistically last. So far the flash rusting has happened on two carbs I've attempted to clean in this manner.

So, what can I do to stop the flash rust or what am I doing incorrectly to cause it? I've seen where you can "season" cast iron pans and such but I'm not sure if that's advisable, let alone possible with a carburetor.

Anybody have any experience or wisdom in this area?

Thanks!

Also, if it matters, the tractors are a 1948 JD A, 1949 JD B, 1950 Farmall H, and a 1962 JD 1010. Might be a year or two off on some but that's ball park.

Replies:

• Re: How to prevent cast iron carburetor flash rust/internal Dave G9N 12:02:03 12/12/23 (0)
• Re: How to prevent cast iron carburetor flash rust/internal caterpillar guy 01:51:23 12/12/23 (0)
• Re: How to prevent cast iron carburetor flash rust/internal timcasbolt 15:54:52 12/11/23 (0)
• Re: How to prevent cast iron carburetor flash rust/internal dr sportster 13:41:34 12/11/23 (0)
• Re: How to prevent cast iron carburetor flash rust/internal old 12:45:17 12/11/23 (1)
  • Re: How to prevent cast iron carburetor flash rust/internal dhermesc 05:36:44 12/12/23 (0)
• Re: How to prevent cast iron carburetor flash rust/internal Mike(NEOhio) 12:44:56 12/11/23 (0)
• Re: How to prevent cast iron carburetor flash rust/internal rustred 12:35:33 12/11/23 (0)
• Re: How to prevent cast iron carburetor flash rust/internal Geo-TH,In 11:10:27 12/11/23 (0)
• Re: How to prevent cast iron carburetor flash rust/internal redtom 10:25:10 12/11/23 (0)
• Re: How to prevent cast iron carburetor flash rust/internal Janicholson 10:15:48 12/11/23 (0)
• Re: How to prevent cast iron carburetor flash rust/internal Eric in IL 08:59:59 12/11/23 (0)

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