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Farmall & IHC Tractors Discussion Forum
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Super H Carb

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Stevex

07-13-2007 08:03:55




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I need a new carberator for my Super H. Here is the problem. I have no idea what the parts number is.

If I look at the rebuilt kit for the Super H, none of the gaskets would line up with the carb I have.

If I look at the kit for the H the gaskets would work. The picture of the rebuilt carb in the H section looks just like mine.

The only two things I know for sure is I definitely need a new carb and I definitely have a Super H, not a H.

Was it possible, would it fit, someone put a H carb on a Super H?

If I buy the Super H carb listed here should it fit my Super H or where there different configurations.

Steve

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RustyFarmall

07-13-2007 09:42:34




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 Re: Super H Carb in reply to Stevex, 07-13-2007 08:03:55  
The carb for the H, and the carb for the super H are two very different carburetors. The super H carb is basically the same dimensions as an M carb., and an M carb can be substituted on a Super H, in fact, an M carb can be fitted to an H, but it is not a direct fit and does require drilling out the holes in the manifold so I really do not recommend doing that.

Are you absolutely certain that you have a Super H, and not just an H with super H decals?

Another possibility is that your super H does not have the correct manifold, but instead has an H manifold. The two manifolds will directly interchange, but the H manifold has a smaller throat and will not allow maximum performance on a super H.

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Stevex

07-13-2007 09:58:50




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 Re: Super H Carb in reply to RustyFarmall, 07-13-2007 09:42:34  
The YT listing for the manifold shows the same part number and manifold for the H and SH.

"Manifold - Heavy duty intakeexhaust manifold comes with short straight pipe for vertical exhaust that bolts to manifold. For 300, 350, H, Super H, Super W4, W4; all GAS engines"



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D Slater

07-13-2007 11:47:10




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 Re: Super H Carb in reply to Stevex, 07-13-2007 09:58:50  
Original IH manifolds for H and SH used a different bolt spread for carburetor. Most aftermarket have sloted holes so one manifold fits all. If you have a IH tube there will be a # on it. Post # and all letters for identifacation. Look on side of engine block above oil filter to see if C 164 is cast on block in raised letter and # to see if you have a SH engine. If tractor does what you want, consider fixing carburetor on it. In most cases a H tube used with a SH size carb will bind the verticle rod in governor.

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Stevex

07-13-2007 14:43:49




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 Re: Super H Carb in reply to D Slater, 07-13-2007 11:47:10  
I checked and it appear to be an H rather than a SH. Thanks for everybodies help.



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stevex

07-13-2007 12:03:22




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 Re: Super H Carb in reply to D Slater, 07-13-2007 11:47:10  
Thanks. I will check and make sure I have a super H and a SH engine.

There is a small round brass tag riveted on the upper body of the carb right above where the reg. tube bolts on. It says "50981 DC". Does that tell you anything. The one might just be a line seperating the numbers from the letters.



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RustyFarmall

07-13-2007 12:44:47




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 Re: Super H Carb in reply to stevex, 07-13-2007 12:03:22  
The 50981DC is an H carburetor, not a super H.



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Stevex

07-13-2007 09:53:02




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 Re: Super H Carb in reply to RustyFarmall, 07-13-2007 09:42:34  
I thought about that, but I am pretty sure the ID tag said super H. I will check when I get home. Its been a while since I actually looked at it. The throat on the manifold is fairly small so that could be an issue as to why the H carb was on it.

So if I do in fact really have a super H then I am looking at a new manifld, new carb, and new Gov. tube and shaft.

How much HP do you think I would be loosing with the H vs the SH.

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RustyFarmall

07-13-2007 10:50:06




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 Re: Super H Carb in reply to Stevex, 07-13-2007 09:53:02  
I could only guess as to the loss in horsepower, but I'm sure you are loosing some. Depending on how the tractor is being used, the loss may or may not be an issue.



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Stevex

07-13-2007 09:20:12




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 Re: Super H Carb in reply to Stevex, 07-13-2007 08:03:55  
So if the super H bolted differently to the Reg tube, does that mean they changed the reg tube as well, or do all the changes even go past that.

Will the H carb work if I get another one. It was propane and I am switching it back so I dont know if it worked prior.



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Janicholson

07-13-2007 09:38:01




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 Re: Super H Carb in reply to Stevex, 07-13-2007 09:20:12  
I believe there is no other changes to the gov. The only item is the tube and possibly the shaft from the gov to the carb. They were shorter on the SH. The SH carb is a better unit (opinion) and looks better on the engine. JimN



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RustyFarmall

07-13-2007 11:04:22




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 Re: Super H Carb in reply to Janicholson, 07-13-2007 09:38:01  
The governor tube on my M measures approximately 7", the tube on my H is about 6", and the tube on my super H measures 5 3/4". Measurements for the carbs, from the center of the mounting holes, to the point where the governor tube attaches, is just about 1/4" greater on the super H/M carburetor than on the H carb, which explains why the gov tube on the super H measures about 1/4" less than the same tube on an H. I think the tubes are the same, one is pushed further into the governor than the other.

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Stevex

07-13-2007 09:47:11




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 Re: Super H Carb in reply to Janicholson, 07-13-2007 09:38:01  
OK, thanks. I did some searching in the archives and found basically what you just said plus a lot of other interesting stuff that caught my eye.

Where can I get a tub and shaft? I dont see one on here.

Also, the tube on it now seems to be short, maybe between a quarter and half inch, as it can be pushed back toward the governor housing, sort of like its spring loaded. It did help get the carb on and off. Is that normal or is it possible the tune is actually the stock tube and they just replaced the shaft.

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Janicholson

07-13-2007 10:06:53




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 Re: Super H Carb in reply to Stevex, 07-13-2007 09:47:11  
IT is possible that the tube on it is SH, with the correct shaft in it. Worry if it is too short on the SH Carb. Be very careful when installing the carb to get the throttle shaft tab into the gov shaft drive tabs, it is trickie, and very important as the engine will/can run away if not correct. I do not know of a source for the tube, but it may be a moot point. Good luck, JimN



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Janicholson

07-13-2007 08:56:27




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 Re: Super H Carb in reply to Stevex, 07-13-2007 08:03:55  
The SH carbs are very different (bigger venturi and flow) different design. Someone replaced yours at some time in the past. There are differences in the tube connecting the governor to the throttle (search the archives for Governos the same) to find data on the issue. I would do it. JimN



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