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Farmall & IHC Tractors Discussion Forum
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Super a carb problem

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lacash

02-26-2008 16:44:40




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I'm trying to get my grandfather's 52 Super A back running again. It sat for 2 or 3 years, and it took me a couple of months to get the engine unstuck. My current problem is the carb however. When I try to crank it, it will hit a few times but never actually fire up and run. If I open the choke after trying to crank it, gas runs out. Any suggestions on what could be causing it? I seem to have about the same amount of suction at the carb as I do pressure at the exhaust.

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SteveNH

02-26-2008 19:50:23




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 Re: Super a carb problem in reply to lacash, 02-26-2008 16:44:40  
Welcome to my world... When you figure it out please let me know and I will do the same. I posted a few below.



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lacash

02-27-2008 17:32:17




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 Re: Super a carb problem in reply to SteveNH, 02-26-2008 19:50:23  
I know the gas has to be old. So it looks like I'll be rebuilding the carb and putting in fresh gas. By the way, the gas is coming out of the intake on the carb (I have the filter off at the moment.) But only after turning the engine over for several seconds. If rebuilding the carb doesn't work then I'll start looking at compression. Thanks for the suggestions guys.



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riverbend

02-27-2008 18:25:14




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 Re: Super a carb problem in reply to lacash, 02-27-2008 17:32:17  
You have to drain the gas any way, so start with that. Add a gallon of fresh gas and try it. If you can get it to run before you take the carb apart you might figure out the areas that need the most work.

GReg



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riverbend

02-26-2008 19:39:05




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 Re: Super a carb problem in reply to lacash, 02-26-2008 16:44:40  
Un-stabilized (or un-seafoamed) gas goes bad in just a few months, all the volatile stuff evaporates. Use fresh regular unleaded gas.

If the fuel was not shut off when it was parked, clean out the carb. Put in a set of plugs, and points. Re-set the timing.

Fuel dripping out of the bottom of the carb is normal if you crank it very long with the choke closed.

When you try to start it, leave the ignition off, close the choke and crank it two or three times. Open the choke, turn on the ignition, and open the throttle 6-7 clicks (~1/4 throttle), and then try the starter again.

Good luck.

Greg

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ScottyHOMEy

02-26-2008 17:44:52




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 Re: Super a carb problem in reply to lacash, 02-26-2008 16:44:40  
Good chance with it setting that long that you've got a lot of water from condensation in the gas tank.

If that's the case, you could turn off the fuel and a) remove the fuel line from the carb end and drain down a quart or two, or until you are sure you're getting good gas. A large coffee can works, but I like something in glass so I can see if any water settles out of the drained fuel. While you have it apart, remove the brass elbow into the carb and make sure that it's clean, then replace it.

b) before you hook the fuel line back to the carb, drop the bulb on the sediment bowl and clean it out. Have a look at the screen at the top of the bulb and clean it if necessary, especially if the fuel coming down the line earlier didn't seem to flow well. If it didn't flow well, you might as well unhook the fuel line at the top end and blow it out, too.

c) Replace the bulb and hook the fuel line back up, and give it another try.

One other thought relates to the carb. Might be that the float is stuck. Can't hurt to give a tap (not a wallop) to the side of the bowl on the carb.

If all this fails, think about cleaning/rebuilding the carb. Check the condition of the float needle. If it's stuck, it could be causing the whole problem.

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P and R Pete

02-26-2008 17:32:40




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 Re: Super a carb problem in reply to lacash, 02-26-2008 16:44:40  
lacash,
When I bought my super-a used, and I had gas running out, here's what I found in the inside...

Now I'm sorry, but I don't know how to get pics to work, but here are the urls. if you 'copy and paste' them up at the top of your computer, they shoud show. (Or maybe someone can tell me how to do it)

Link
Link

The second picture is a jury-rigged float, after the metal one broke, or whatever.

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Red Mist

02-26-2008 17:15:40




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 Re: Super a carb problem in reply to lacash, 02-26-2008 16:44:40  
You also may have dirt or rust in the gas tank, clogged fuel line, corroded points, weak coil, bad condensor - just to name a few of the "usual suspects" when a tractor has been sitting for years. But, I'd sure start with a carb rebuild.
mike



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Red Mist

02-26-2008 17:08:11




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 Re: Super a carb problem in reply to lacash, 02-26-2008 16:44:40  
Lacash: If it has been sitting for two or three years, there is virtually no way that tractor is going to run without a complete carburetor rebuild. If you are capable of doing the job, then find out which one of the following three brands of carbs is on the tractor: Marvel-Schebler, Carter or Zenith; then go to your Case-IH dealer, or perhaps a NAPA store and get a carb kit to rebuild your carb. In addition, you will need access to a vat of strong carb cleaner. Disassemble the carb and let it soak for 2-3 days. Then blow out with some strong air pressure and assemble to specs. Good luck.
mike

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