farmall c dies after a few seconds of running

farmallboy15 · Dec 27, 2013

Right now I"m in the process of "refurbishing" a farmall c. We had to take the manifold off to have the exhaust pipe repaired. When putting it back on I did not replace the gaskets as they were recent and looked good. It will start right up but it races a little and will run pretty steady and then die within about ten seconds. To me this sounds like a fuel problem. The owner would never turn the fuel off, I had turned it off while the manifold was off. I do have a set of gaskets for it but I don"t think its a vacuum leak. The only thing I can think of is I don"t have the fuel all the way back open.... Anyone else have ideas of things to check? Thanks for any help!

cole in mo. · Dec 27, 2013

If it races when started, it sounds more like leaking intake gaskets.

old · Dec 27, 2013

3 things to check.
#1 pull the carb drain plug and make sure you have a good steady flow of gas for a few minutes. Catch the gas to make sure it is not full of water or dirt.
#2 check for a good blue/white spark the moment it dies.
#3 with the air cleaner tube off when it starts to die put you hand over the air intake and see if you can keep it running and feel a good suction. It may in fact have a vacuum leak so as it heat up you loose air intake suction

GordoSD · Dec 27, 2013

Try this. Start it, let it run 7 seconds and then close the choke. I think it's flooding.

GordoSD · Dec 27, 2013

If the carb is full of fuel, and it must be, as it starts well then it would run for 45 seconds on just the bowl gas. So it is not a fuel delivery problem.
The engine is not going to heat anything up in ten seconds so forget about heat being a factor.
Does it die "slowly" or like you flipped the ignition off?

farmallboy15 · Dec 27, 2013

It dies slowly. It will kind of stumble as it dies. I tried playing with the choke which didn't seem to help. My thought is the sediment bowl isn't open all the way. The carb starts with a full bowl. Once it gets running the flow can't keep up with demand. This still doesn't explain the racing that happened today.

steve alderman · Dec 27, 2013

check the main jet in the carb I had a super A that would do the same thing they like to collect rust and can be a pain to get out if it don"t want to come put a little heat to it only brass wont hurt it

Tom Fleming · Dec 28, 2013

a simple check is to remove the sediment bowl base from the bottom of the gas tank and make sure the stand pipe part of it is not filled with rust and debris. Also, when this thing dies, immediately open the drain on the bowl the carb. Does gas come out or not?

Checks those, and go from there. Post what you find.

GordoSD · Dec 28, 2013

Have you had the carb off recently? You may not have the governor shaft correctly lined up.

teddy52food · Dec 28, 2013

C is different than an H or M. Linkage is out in the open. Pull the line off at the carb & open the valve. If flow checks out good there, take the fitting off the carb & clean that screen.

gene bender · Dec 29, 2013

If the engine runs a few seconds the bowwl is not full of gas as you can turn the gas off at the tank and it will run for more than a few seconds you arent getting gas thru the carb . First remove the carb with gas line still attached and then remove the line to soo how much flow you have. The reason for removing carb with gas line still attached it is easier to rethread the fitting back this will elinate cross threading when re attaching the line as you probably will need to remove the carb anyway.

farmall c dies after a few seconds of running

farmallboy15

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cole in mo.

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old

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GordoSD

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GordoSD

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farmallboy15

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steve alderman

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Tom Fleming

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GordoSD

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teddy52food

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gene bender

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