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Farmall & IHC Tractors Discussion Forum
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Soaking a carb?

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Kelly C

12-16-2004 08:13:36




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Ok, so far I have rebuilt 2 tractor carbs and a Ford truck carb. None has worked right after I was done. So being the knott head that I am. I am going to try another.
These things are not all that complicated. I understand how they work. For some reason they never run any better when I am done.
I have come to think the problem is in the prep of the carb before rebuilding it.
So I plan on soaking this 300 carb for atleast a week before I put in the new parts.
Whats a good thing to soak it in and where do I find it?

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SproutW

12-19-2004 16:48:51




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 Re: Soaking a carb? in reply to Kelly C, 12-16-2004 08:13:36  
Ok, what do you do when the carb is full of rust. I"ve found the carb cleaner doesn"t dissolve rust so what will that won"t hurt the carb?



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ChadS

12-17-2004 05:55:15




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 Re: Soaking a carb? in reply to Kelly C, 12-16-2004 08:13:36  
Mineral spirits works the best for the dollar. Couple of days in a coffee can, and loosens up all the gunk inside the carb casting. Make sure you get the little plug out of the throttle body, and blow it out with air for a while. Good way to know if all the passages are clear, is to blow air in each hole, and find where it exits, if you find a hole that dont have air, or alot of air, then there is where you problem location is in the carb. M-450 carbs are simple to rebuild, unless it is the later version, and has the idle screw up on the carb flange, then it is a different circuit style, where the "curb idle" lol sets the idle system for operation. ChadS

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gusc

12-16-2004 18:52:15




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 Re: Soaking a carb? in reply to Kelly C, 12-16-2004 08:13:36  
I agree with all the others who use Berryman Chem-Dip all purpose carb and parts cleaner. I've used it for years on my carbs and it has never failed to do the job. I've never found anything better nor more reasonably priced.

I don't leave anything in the dip very long though, don't have the nerve to leave anything in over an hour and usually about 15 min.

My advice is to go by the instructions.

Don't see how anything costing $250 could possibly be any better.

I think I have had my present gallon for 5-8 years, you just don't lose much if you let it drain a while before removing it. There is a tray in the gallon can you can use as a drain.

The odor is another thing, it is hard to get out of your clothes. I have to leave mine on the back porch couple of days before my wife will wash them.

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RustyFarmall

12-16-2004 16:47:04




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 Re: Soaking a carb? in reply to Kelly C, 12-16-2004 08:13:36  
Kelly, you are on the right track getting the Mac's from NAPA. When you take the parts out of the cleaner, immediately rinse in steaming hot water, then blow dry with compressed air. Make absolutely certain that air blows through ALL of the ports and passages. With the exception of the screw holes, any hole that you blow air into, the air should exit somewhere else. If it doesn't, either the carb is not yet clean, or the disassembly wasn't complete.

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Steve from MO - dangit!

12-16-2004 13:51:15




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 Cleanliness! in reply to Kelly C, 12-16-2004 08:13:36  
I usually have good luck but I am not into the long soaking habit. I use either carb or brake cleaner depending on which is handy, but I make sure to take all the lines off and needle valves out before I use the cleaner to blow out the passages. A long-dead gunked up carb might require a brass wire up the narrower passages to get the cleanout started.



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Allan in NE

12-16-2004 11:13:43




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 Re: Soaking a carb? in reply to Kelly C, 12-16-2004 08:13:36  
Kelly,

It probably wouldn't work too well on a 1-gallon can of the cleaner, but what I used to do with the larger 5 gallon size was to make a line/valve affair out of a ¼” brake line and brazed on a fitting to fit my air hose.

I would stick this line down into the bottom of the cleaner bucket and crack that valve just enough to make the carb cleaner "boil".

It really gave the stuff a nice agitating action and made it ‘move’ in and around the carb parts. Kind of a ‘carburetor washing machine’.

Allan

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Tim...OK

12-16-2004 12:18:38




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 Re: Soaking a carb? in reply to Allan in NE, 12-16-2004 11:13:43  
A buddy of mine made a carb washer out of an old electric ice cream freezer..takes 5 gallon bucket of solvent,sit machine on top of bucket,with a basket hanging down in solvent,attached to motor..put parts in basket and leave it overnight,came out sparkling clean..not sure what kind of solvent he was using though..

Tim



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Guy

12-16-2004 10:01:44




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 Re: Soaking a carb? in reply to Kelly C, 12-16-2004 08:13:36  
I"ve used the Macs and been happy with it. Saw something a few weeks ago on another forum where they recommended using guitar strings for cleaning the passage ways.



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Allan in NE

12-16-2004 09:38:46




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 Re: Soaking a carb? in reply to Kelly C, 12-16-2004 08:13:36  
Hi Kelly,

The best carb cleaner you can buy is the "Tyme" brand. A 5 gallon bucket with the tray will probably run well over $250; closer to $300.

But, this is the real stuff and not one of those watered down "home-user" types. I wouldn't leave a carb in it much longer than about 30 minutes.

A lot of carbs nowadays are nothing more than pot metal with a thin 'sealing' coat of another metal. This cleaner will make a sieve out of 'em if they were left soaking for a week.

Allan

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JT

12-16-2004 09:51:38




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 Re: Soaking a carb? in reply to Allan in NE, 12-16-2004 09:38:46  
Allan, Where can you still buy Tyme? I have not seen it for a long time, though the EPA had said it was too dangerous and caustic to have on the market. I would love to find a 5 of that stuff again.
Jim



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Allan in NE

12-16-2004 10:11:52




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 Re: Soaking a carb? in reply to JT, 12-16-2004 09:51:38  
Hi JT,

Yeah, it is some nasty stuff and I do remember them fighting with the EPA. I used to go thru 5 gallons in about 6 weeks back when I was doing a lot of carbs.

NAPA carried it here, the last I knew. (Maybe they don't anymore, dunno)

Allan



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old

12-16-2004 09:21:39




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 Re: Soaking a carb? in reply to Kelly C, 12-16-2004 08:13:36  
I use Berryman chem-dip all purpose carb and parts cleaner on my carbs. I soak them for no more then 24 hours. Most of the time that does the job. I also spray it out with gumout etc. carb cleaner to rinse out the berrymans and also blow them out with compressed air. Also in places that I can I use wire/tip cleaner tools to clean out the small holes in them.



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lee

12-16-2004 10:54:03




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 Re: Soaking a carb? in reply to old, 12-16-2004 09:21:39  
I agree with old on Berrymans. It's pretty good stuff (better than bio-degradables or water based types) but prolly not as aggressive as Allen's recommendation. Stuff the inlet/outlet with rags and clean the outside of the carby good with degreaser, gasoline, diesel, whatever. This will help keep your soaker can clean. Disassemble entire carby. An overnite soak of all parts (no plastic) in the Berrymans and a wash/rinse with industrial soap and hot water, compressed air blow-out. Do it again if necessary. Don't get water in the berrymans. Should do it. I don't like wire reaming the drillings exceptr as a last resort.

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JT

12-16-2004 09:50:05




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 Re: Soaking a carb? in reply to old, 12-16-2004 09:21:39  
Be careful about soaking some of the lawnmower carbs over 1/2 hour-45 minutes, as Allan said, the use a porous aluminum, then coated and carb dip will strip that off and then you have a useless carb.



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JT

12-16-2004 09:50:03




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 Re: Soaking a carb? in reply to old, 12-16-2004 09:21:39  
Be careful about soaking some of the lawnmower carbs over 1/2 hour-45 minutes, as Allan said, the use a porous aluminum, then coated and carb dip will strip that off and then you have a useless carb.



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JT

12-16-2004 09:02:13




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 Re: Soaking a carb? in reply to Kelly C, 12-16-2004 08:13:36  
A week is a little excessive. I would go to the local auto parts store and see if they have Berrymans carb cleaner in a gallon can. Have one that seems to do a good job on. soak an hour or two, then rinse with HOT water, that gets all the cleaner off the carb, This usually solves the problem.



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Farmall Don

12-16-2004 09:41:56




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 Re: Soaking a carb? in reply to JT, 12-16-2004 09:02:13  
That what I do, but I let it soak over night. Its worked great for me.



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Red Dave

12-16-2004 08:20:28




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 Re: Soaking a carb? in reply to Kelly C, 12-16-2004 08:13:36  
Kelly, I buy a gallon paint can full of carb cleaner at the autoparts place. It has a basket in it and is all ready to put your carb in to soak.

I like to disassemble, clean the worst of it off, remove gaskets any rubber/plastic pieces, then let it soak for awhile. I've let some soak a week or more. It will take any paint off too.

When I take them out, I carefully clean all the little passages with a spray carb cleaner useing the little tip that comes with them.

When you put it back together keep everything clean, clean, clean.

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Kelly C

12-16-2004 09:19:04




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 Re: Soaking a carb? in reply to Red Dave, 12-16-2004 08:20:28  
Thanks for the tip.
Nice having internet in my truck!!!
Swung by NAPA and picked up MAC's Carb cleaner with the dipping basket. I will give that a try. Hope it works as it cost $47.89 for the gallon.
Still cheaper than the $170 I paid for a rebuilt carb for my 460. IF it works that is.



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lee

12-16-2004 11:01:24




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 Re: Soaking a carb? in reply to Kelly C, 12-16-2004 09:19:04  
That sounds like good stuff, I'll try it.
Berrymmans I think is around $15-$20.



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JT

12-16-2004 09:48:03




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 Re: Soaking a carb? in reply to Kelly C, 12-16-2004 09:19:04  
Mac's cleaner is also good, yes it is expensive, but it works good, I have tried the 10-12 dollar a gallon stuff, did not work real good. I guess I do not want any paint or anythign left on the carb when I am done, so I buy the best I can find. You WILL NOT regret buying the good stuff.



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Red Dave

12-16-2004 09:23:15




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 Re: Soaking a carb? in reply to Kelly C, 12-16-2004 09:19:04  
I don't know what you bought, but I paid $10-$12 bucks for what I used.

For $47.89 it oughta reassemble the carb for you and put a new needle valve too!



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Kelly C

12-16-2004 09:38:06




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 Re: Soaking a carb? in reply to Red Dave, 12-16-2004 09:23:15  
HAHA! Thats par for my course! MAybe internet in the truck is a bad thing. I get to react too fast.



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TP from Central PA

12-16-2004 08:35:41




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 Re: Soaking a carb? in reply to Red Dave, 12-16-2004 08:20:28  
We always soak them for awhile and then spray all the passages out with compressed air..... ..Then reassemble.

I have had marginal success, but my brother is like a wizz with them..... ..... He got a few working that I failed on(Smile).

I seem to have trouble with only ATV carbs..... ...



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supergrumpy

12-16-2004 10:30:41




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 Re: Soaking a carb? in reply to TP from Central PA, 12-16-2004 08:35:41  
What works for me:

taking carb apart carefully, looking for parts that prior rebuilder left out

soaking overnight in can of cleaner

rinse off with water

ESSENTIAL part is blowing out good with air

if no compressor, 12v tire pump with football needle on end works great

if you feel brave, punch out the soft plugs and gently run wires thru EVERY passage

works lot more often than not



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