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Ford Tractors Discussion Forum
Show Parts for Model:

Rebuild or replace Ford 3000 carburetor

Author 
Ford 3000

10-20-2007 17:36:55
207.255.163.74



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This is my first post at the Form board, although not my first visit to the Form board. I just purchased my first tractor and much of my research was done reading through all the old posts. Actually I am the new owner of the "red" Ford 3000 from Ebay. I have many questions, but I'll post one at a time. So, back to the carb...I choke the tractor to start and then I have to run with the choke 1/2 way in (1/2 way out) or she coughs and sputters. Former owner claimed this is the case with all old Fords, but it just doesn't seem right to me. When I read through old posts it appeared many owners have switched to a Zenith. Do I need a Zenith too, or will a rebuild kit for my Holley do the trick and keep a lot more money in my pocket?

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soundguy

10-20-2007 21:14:11
71.49.9.155



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 Re: Rebuild or replace Ford 3000 carburetor in reply to Ford 3000, 10-20-2007 17:36:55  
The seller is ignorant or.. well.. ignorant.

All fords don't need aprtial choke to run.. if they did.. ford would have built them that way.

Adding choke does the following:

enriches the fuel /air mix

upps manifold vacume felt at the carb jets

needing choke to run indicates:

weak spark ( enriched mix fires on a weaker spark )

fuel obstruction ( extra manifold vacume can pull fuell thru a clogged port a little easier ..too lean of a mainjet setting can show up like this )

vacume leak ( the leak leans out the mix... adding choke enriches it.. getting it closer to normal.. )

Find the problem.. fix it. if it is the carb, and if the carb can't be fixed.. then repalce it.

soundguy

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3000OH

10-20-2007 20:03:57
75.93.186.191



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 Re: Rebuild or replace Ford 3000 carburetor in reply to Ford 3000, 10-20-2007 17:36:55  
Success seems to be about 50-50 on rebuilding those infernal Holleys. Count us in the failed department - and I"ve got a lot of successful rebuilds in my past and am only too familiar with finding carbs that are sensitive to 1/64" or even 1/128" float changes.

As I"ve written in other posts, we made the (expensive) switch to Zenith. Easier starting, better/smoother throttle response, and the choke is used only fort starting now. What pushed me over the edge was reading this post from Zane, a much-respected Ford wrench on this and the N board.
http://www.ytmag.com/cgi-bin/viewit.cgi?bd=ford&th=317519
(if the link doesn"t work, type in Zane Holley into the search window)

BTW, there are two types of Zeniths, one for "65-"68 and another for post-"68.

Good luck.

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CENTAUR

10-20-2007 19:51:54
75.17.141.82



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 Re: Rebuild or replace Ford 3000 carburetor in reply to Ford 3000, 10-20-2007 17:36:55  
What MAKE and MODEL CARBURETOR have you? CENTAUR



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Dean

10-20-2007 17:58:48
68.46.209.10



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 Re: Rebuild or replace Ford 3000 carburetor in reply to Ford 3000, 10-20-2007 17:36:55  
Ford:

It is not true that all/most old Fords must be run with the choke partially on in order to run properly once warmed up.

I see no reason for you to change to a Zenith carb, at least not yet. There are many things that can cause your engine to run poorly unless it is choked.

I would look for the obvious problems first, e.g., vacuum leak between the carburetor and intake manifold or between the intake manifold and cylinder head, clogged fuel filter, bad fuel pump, poor/weak ignition, bad spark plugs, etc.

If you eliminate these problems and it still will not run correctly you can rebuild the carb at that time. If you do so, do yourself a favor and buy your kit at CNH. Take your tractor and carburetor serial number with you when you order it and be prepared to spend around $80. Get a copy of the carburetor overhaul pages from the proper CNH service manual and follow the procedure precisely. The Holley carburetors are sensitive to float adjustments due to the vacuum operated accelerator pump.

Good luck with it.

Dean

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Ford 3000

10-20-2007 18:39:49
207.255.163.74



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 Re: Rebuild or replace Ford 3000 carburetor in reply to Dean, 10-20-2007 17:58:48  
Dean, thanks for the quick and thorough response. One item I did not think to mention until I read your last line "The Holley carburetors are sensitive to float adjustments due to the vacuum operated accelerator pump" is that some one had installed an electric fuel pump. Would this have any effect or just evidence of a previous problem?

Thanks



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