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02-16-2016, 08:52 AM | #1 |
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Best way to clean out a carb?
My 94 has been on an engine that last ran in 1961. I completely dissasembled it and I am in the process of cleaning it up. In the bottom of the bowl is a heavy scale. I have had it dunked in carb cleaner for 24 hours and it is doing nothing to the scale. It is a very hard white substance, hard to scrap off even using a blade. What action should I take next?
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02-16-2016, 08:59 AM | #2 |
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Re: Best way to clean out a carb?
Soak it in acetone, when completely dry, bead blast it thoroughly. Blow out all passages with compressed air. Then hit all passages with some cheap aerosol carb cleaner. You do have to completely take the carburetor apart, including the check valves. Otherwise you run the risk of having some glass beads get lodged behind and blocking them.
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02-16-2016, 09:13 AM | #3 |
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Re: Best way to clean out a carb?
Bead blasting it will take away the protective oxidecoating so will caustic cleaning.
If its just the bowl area some blasting in there sounds like a plan. |
02-16-2016, 09:18 AM | #4 |
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Re: Best way to clean out a carb?
True, but I re-chromate them. I remember seeing some well-known carburetor-builder from the Seattle area who always had a booth at the Portland swap meet. All of his were blasted, from the texture they looked sand blasted and left raw. Given the limited environment and run times these cars see, I think even left unprotected, the owners would weather away before the carburetors would. Just my .02
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I dig coal, which provides motivation for EVs. Last edited by 1952henry; 02-16-2016 at 09:26 AM. |
02-16-2016, 11:44 AM | #5 |
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Re: Best way to clean out a carb?
Beautymus.
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02-16-2016, 06:57 PM | #6 |
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Re: Best way to clean out a carb?
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02-16-2016, 07:00 PM | #7 |
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Re: Best way to clean out a carb?
Another one under the acc pump nozzles.
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02-16-2016, 07:06 PM | #8 |
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Re: Best way to clean out a carb?
I cannot see that one, maybe too much crud blocking my view.
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02-16-2016, 07:10 PM | #9 |
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Re: Best way to clean out a carb?
Looks like a needle valve with the point down probably stuck you should be able to see the rounded back end of it.
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02-16-2016, 07:20 PM | #10 |
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Re: Best way to clean out a carb?
If either the ball or inverted needle are stuck, hold the body upside down and smack it on a hard wood surface. Make sure to hit it "square" so you don't tweak a side or corner. I've applied some concentrated light persuasion with a small hammer a time or two.
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02-16-2016, 07:34 PM | #11 |
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Re: Best way to clean out a carb?
Ok needle is out but I see no ball.
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02-16-2016, 07:39 PM | #12 |
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Re: Best way to clean out a carb?
After removing all the ball and needle valve glass bead the body, then use a guitar string B or small E go through the passages, blow the passages. Walt
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02-16-2016, 07:40 PM | #13 |
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Re: Best way to clean out a carb?
I would find a shop that has an ultrasonic cleaner. Many motorcycle shops have one. Parts come out absolutely pristine.
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02-16-2016, 07:41 PM | #14 |
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Re: Best way to clean out a carb?
Under the acc pump nozzle there should only be the needle so youre done there
Last edited by flatheadmurre; 02-16-2016 at 08:12 PM. Reason: A missing word put back where it was intended |
02-16-2016, 08:00 PM | #15 |
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Re: Best way to clean out a carb?
Wrong. Under the pump is a small steel ball, there is a wire ring holding it down, you have to take hook or stiff wire with a hook on it and pull the ring out then turn the body over and tap it on board to get the ball out. The brass needle is under the discharge squirters. Walt
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02-16-2016, 08:04 PM | #16 | |
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Re: Best way to clean out a carb?
Quote:
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02-16-2016, 08:22 PM | #17 |
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Re: Best way to clean out a carb?
For getting the ball under the acc pump out i use a drillbit ground to a U shape.
After taking the crud away over and on the side of the ball its easier to get it out. |
02-16-2016, 08:30 PM | #18 |
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Re: Best way to clean out a carb?
Great info guys, thanks a ton! I see the spring holding the ball down. I think I have got everything else covered. thanks for the guitar string idea!
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02-16-2016, 08:43 PM | #19 |
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Re: Best way to clean out a carb?
.many times the air horn is warped as is the bowl top and bottom ck them out.they can be carefully machined if needed.be careful not to overtighten them.also make sure the power valve gasket is correct or it will leak and run rich.if not sure ask for help.lots of smart guys on here.
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02-16-2016, 08:57 PM | #20 | |
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Re: Best way to clean out a carb?
Quote:
Go to u tube and build a soda blaster. I have done many items with great results. R |
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