Setting H carb

Farmallb · Jul 17, 2017

I put the carb on and started it. It seems to do what it did before I had it rebuilt other than now I have low speed, idle. It will start then die. I can keep it running by pulling the choke out part ways, but that only works for awhile then it dies.
I sat the upper screw at 1 1/2 out and the bottom at 4 out. Any ideas??

rustred · Jul 17, 2017

depends what u mean by rebuilt, as the most important is to soak it in actual carb cleaner and adgitate it every few minutes if you dont have an air adgitator. soak and adgitate for one hr. then rinse with cool water. then blow out passages with air and you can see results. by even squirting wd40 in them and blow out with air and you can follow through them. people seam to think that the kit is the magic, but really its the cleaning.very seldom i buy a kit. and most times i find the upper mixture screw is set at less than one turn out , usually 3/4 turn. main lower jet starts at 2 1/2 and up.

banjoman09 · Jul 17, 2017

There are others more qualified than I on this subject - but- for what its worth; If you have to pull the choke to run carb usually is not getting enough gas. Obstruction in tank where bowl screws in ? sediment bowl clean? Full stream of gas going into carb from tank? If this is all ok- float level maybe...if not that - gas passage may still be plugged in carb. Look for screw settings....maybe start at 2 turns each....these guys will know on that. Just my thoughts...

old · Jul 17, 2017

On the IH gov/carb set up one has to adjust he gov to carb each and every time you pull it of to get them in sink. Plus as said a carb rebuild is not always a good carb rebuild. One need to soak a carb 24 or so hours in a good carb cleaner and then use carb cleaner spray and air and some sort of wire or as I do a torch tip cleaner tool to poke out the passage ways or the job is not done right

David G · Jul 18, 2017

First question, is the venturi installed and correctly mounted?

I do 1/5 turns on the idle mixture.

David G · Jul 18, 2017

1.5 turns

Farmallb · Jul 18, 2017

I called the person who rebuilt it. Told him what it was doing. He said that he had found rust in it, and if there was water in my gas that it would do what I had described to him it was doing. He suggested I drain the carb bowl to check for water. I drained it, and lit it. I dont know how I was supposed to determine if it had water in it, as the heat by what gas was in the can I burnt it in probably evaporated whatever water there might have been in it. its seting out in the sun now. Im going to pull it into a place of continual shade this evening and pull the bowl. I hate to do that, as I dont have a gasket to replace the one between the glass bowl and the holder, BUT if there is water in the gas, I guess ill have to do it. I put a 1/2 can of Sea Foam in the tank as I had only around 5 gal in it.

old · Jul 18, 2017

As for pulling the sediment bowl I do that a lot and almost NEVER have to replace the gasket but if I do have to I keep them on hand. O'Reilly's part number 398 fuel strainer gasket is what they call them. But if it has water in the gas the sediment bowl will also show you that just by looking because there will be two different looking fluids in the sediment bowl unless of course the bowl is so dirty you cannot see that which is should not be. Also if you drain the gas out of the carb and catch it in a glass jar and let ti sit a few minutes you can see if it has the same 2 layer of fluids. Gas floats on water by the way

Farmallb · Jul 18, 2017

Thanks. Ill try that. I knew that gas floats on water. Im getting to where, the things I KNEW, ive forgotten to a large part due to not using the knowledge often enough.

Janicholson · Jul 18, 2017

Are you using ethanol fuel. if so, the water issue is probably irrelevant as the fuel takes up the water. it will do so untill the alcohol is saturated then it begins to gell in the system (a mess). If the fuel looks cloudy, I would suspect water. Jim

rogstown · Jul 18, 2017

Hi David How should the venturi be adjusted? and if it wasn't adjusted correctly, how would that effect the performance?

rustred · Jul 18, 2017

i was under the impression that it only died at idle??? as thats the way your post suggests. seen this also... but under high speed they run good. is that your problem??? never get the whole story here without asking questions then its something totally different. maybe i am interpreting it wrong.

old · Jul 18, 2017

Oh so your gettign to be like me and back when I was in the Navy I could count in 3 number systems like binary octal and decimal. Back then I also remembers what E equaled MC squared was and a bunch of other stuff like that but I have not used that stuff for well over 2 or 3 decades

rogstown · Jul 19, 2017

(quoted from post at 12:23:48 07/18/17) First question, is the venturi installed and correctly mounted?

I do 1/5 turns on the idle mixture.

Is there a specific way your Venturi should be turned in the carb?

Setting H carb

Farmallb

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rustred

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banjoman09

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old

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David G

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David G

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old

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old

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