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Ultrasonic carb cleaning problems #5353956 02/18/20 09:05 PM
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atikovi Online Content OP
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This has happened on the last two carbs I've done. The pot metal has gotten a black coating of something, all over it. I can rub it off with a finger, but I assume it's also on the internal passages. This is a Nikki generator carburetor and I'm using Meguiars Super Degreaser for the fluid.

[Linked Image from fototime.com]

[Linked Image from fototime.com]

For reference, a carb I did a few years ago came out great.

[Linked Image from fototime.com]

What's going on and how to prevent it?

Re: Ultrasonic carb cleaning problems [Re: atikovi] #5353977 02/18/20 09:30 PM
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Trav Offline
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Try simple green 25% in water. 10 min cycles and do not leave it in overnight.


ASE L1, Master. Deutsch Meisterbrief.
Re: Ultrasonic carb cleaning problems [Re: atikovi] #5354003 02/18/20 10:03 PM
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P10crew Offline
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I use Krud cutter in mine.

Last edited by P10crew; 02/18/20 10:15 PM.
Re: Ultrasonic carb cleaning problems [Re: atikovi] #5354006 02/18/20 10:04 PM
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atikovi Online Content OP
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Ok, will get some. Trying a cycle with plain water first right now.

Re: Ultrasonic carb cleaning problems [Re: atikovi] #5354013 02/18/20 10:12 PM
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Trav Offline
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A couple of drops of dish soap will help, don't go overboard and make a bubble bath.


ASE L1, Master. Deutsch Meisterbrief.
Re: Ultrasonic carb cleaning problems [Re: Trav] #5354018 02/18/20 10:16 PM
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bunnspecial Offline
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Originally Posted by Trav
A couple of drops of dish soap will help, don't go overboard and make a bubble bath.


Further to that, I was taught to always use a small amount of some sort of surfactant(soap is easiest as long as it won't cause problems) to maximize the efficiency of a US.

Most of the time when I use US, I'm using a beaker or some other secondary container(often with solvent in it) but still follow this rule for the water bath surrounding my secondary container. A drop or two of Dawn does the trick most of the time as well as anything else.


2010 Lincoln MKZ-Mobil 1 5W-30
1970 MG MGB Roadster-Valvoline VR-1 20W-50
1974 Austin Marina GT VR-1 20W-50
Re: Ultrasonic carb cleaning problems [Re: atikovi] #5354021 02/18/20 10:21 PM
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P10crew Offline
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Go with Trav’s recommendations because I have not done any carb parts. Mostly rocker arms and bolts.

Re: Ultrasonic carb cleaning problems [Re: atikovi] #5354022 02/18/20 10:23 PM
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P10crew Offline
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double post

Last edited by P10crew; 02/18/20 10:24 PM.
Re: Ultrasonic carb cleaning problems [Re: atikovi] #5354126 02/19/20 03:12 AM
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Spktyr Offline
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I would suggest using the new Simple Green product that's aluminum safe - regular Simple Green is corrosive to aluminum if left on too long (which is why the FAA banned it as an aircraft fuselage wash in the US). If you use regular Simple Green on the unprotected aluminum carb body, SG has this to say about it: "Unfinished, uncoated or unpainted aluminum cleaned with Simple Green products should receive some sort of protectant after cleaning to prevent oxidation."

https://simplegreen.com/faqs/

Last edited by Spktyr; 02/19/20 03:27 AM.
Re: Ultrasonic carb cleaning problems [Re: atikovi] #5354135 02/19/20 04:04 AM
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Re: Ultrasonic carb cleaning problems [Re: atikovi] #5354157 02/19/20 06:37 AM
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Olas Online Content
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chemdip


Cable ties should hold it
Re: Ultrasonic carb cleaning problems [Re: Spktyr] #5354176 02/19/20 07:10 AM
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Trav Offline
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Originally Posted by Spktyr
I would suggest using the new Simple Green product that's aluminum safe - regular Simple Green is corrosive to aluminum if left on too long (which is why the FAA banned it as an aircraft fuselage wash in the US). If you use regular Simple Green on the unprotected aluminum carb body, SG has this to say about it: "Unfinished, uncoated or unpainted aluminum cleaned with Simple Green products should receive some sort of protectant after cleaning to prevent oxidation."

https://simplegreen.com/faqs/


You can use the original on aluminum for a short cycle then rinse with water thoroughly, you mix it 25% in water further reducing the possibility of corrosion.
If you change the fluid in the tank often like you should then the aviation stuff is more than double the price and it is not as effective on varnish in the brass parts inside.
I do a lot of large body aluminum injectors found in marine application that have corrosion inside from sea water, after using the regular simple green as described I don't see any repeat corrosion if the part is not subjected to sea water again.


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Re: Ultrasonic carb cleaning problems [Re: Olas] #5354289 02/19/20 10:02 AM
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Trav Offline
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Originally Posted by Olas
chemdip

+1 for small carbs like that its probably the best option, leave it overnight.


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Re: Ultrasonic carb cleaning problems [Re: atikovi] #5354294 02/19/20 10:04 AM
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Berryman B12 is a pretty good carb cleaner w/o the US .


Wyr
God bless
Re: Ultrasonic carb cleaning problems [Re: atikovi] #5354315 02/19/20 10:36 AM
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ad244 Offline
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Pine Sol

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