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Tractor Talk Discussion Forum

Cleaning/Rebuild Carburetor

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Sam MI

12-10-2003 05:45:26




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Marvel Scherbler carburetor. I have soaked it in NAPA carburetor cleaner overnite. It did lossen all the crud build up but: The fuel bowl has much rust in the bottom. Thought I might add a little acid to attack the rust but there is some brass fittings near the bottom so dismissed that idea. Looking for suggestions from the experts. Thanks,




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Slofr8

12-11-2003 04:47:42




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 Re: Cleaning/Rebuild Carburetor in reply to Sam MI, 12-10-2003 05:45:26  
Hi Sam,
I'm not an expert here, only did one, but I did the same as Steve. Removed fittings and plugs and carefully blasted, than soaked in carb cleaner. Than I went through all the ports with a torch tip cleaner. It would be better to use the correct size drill bits available for this but my carb works great.
Good Luck. Dan.



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Alberta Mike

12-10-2003 10:57:28




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 Re: Cleaning/Rebuild Carburetor in reply to Sam MI, 12-10-2003 05:45:26  
I've used CLR (do you have that down there) for carbs but not for any long-term soaking. It works pretty quickly and should clear that rust right up. I've never seen any problems with the brass stuff. Fifteen or 20 minutes whould do a decent job. There is an excellent article in the "articles" section in the left nand margin on rebuilding a Schebler cast iron carb, good photos and everything. Once caution though, the article talks about removing the brass like it will just come out no problem. Of course, most of us have learned the hard way after twisting off a jet or a fuel nozzle that it doesn't. Don't try it without applying gentle (propane) heat first and a proper removal device (screwdriver, wrench, etc) that fits EXACTLY right with no slack, otherwise you'll be in trouble.

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rustyfarmall

12-10-2003 09:18:09




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 Re: Cleaning/Rebuild Carburetor in reply to Sam MI, 12-10-2003 05:45:26  
You might want to try the electrolysis method. It is a rather slow process, but very effective. Do a search of the archives on how to do this. It is too lengthy for me to go into it here.



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old

12-10-2003 06:42:53




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 Re: Cleaning/Rebuild Carburetor in reply to Sam MI, 12-10-2003 05:45:26  
I'm not an expert but you might try soaking it in turpentine and see what that might do. The next carb I clean I plan to try it and see if it helps. Rust in the bottom of old carbs has seen a lot of them go to the junk pile. Seems like the rust slows the flow of gas and makes a carb junk, I would love to find something that will work so I can fix a couple carbs I have that won't clean up enough to run the tractors that they where on.

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Slowpoke

12-18-2003 00:30:55




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 Re: Re: Cleaning/Rebuild Carburetor in reply to old, 12-10-2003 06:42:53  
Remove all the brass (carefully) then use small wire brushes. small wire wheels, steel wool, sharp pointed instruments. You will sooner or later scrape all the rust out, then clean with carb cleaner and air pressure to get all the loose stuff out.



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steve

12-10-2003 07:33:39




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 Re: Re: Cleaning/Rebuild Carburetor in reply to old, 12-10-2003 06:42:53  
I media blasted (like sand but wont damage anything) the inside and outside of my carb and it worked great. Be carefull and plug all the holes. I just blasted the bottom inside and entire outside of carb. Cleaned with air and carb cleaner. Looks and runs like a new one.



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