Question about Farmall IH Tractor Gas Fuel Sediment Bowl 61782C91

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I have a IH 656 gas tractor. it wont run unless the choke is pulled out more than halfway. when it is warmed up and you try to close the choke the engine starts going fast then slow, fast then slow, and if you close the choke all the way it dies. I have replaced the air filter, cleaned the sediment bowl. drained the gas from the carb bowl, and finally today I removed the carb, dismantled it, and soaked it in carb cleaner for a couple of hours, blew it all out with air pressure but all this did not help.

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  • swoopchime
    swoopchime Aug 01, 2012

    u have to remove the bowl so try not spill the fuel so u can see the level then u need to remove the float an plunger,now u will see a part that go almost to the bottom of bowl, there should be a jet inside unscrew it now u can blow both of them out, now one more to go there should be a shorter one , do the same to it, then put your finger inside the carb, u should feel the air are hear it no more than 90 psi of air

  • Anonymous Mar 19, 2014

    Have replaced Cdi box carb and fuel pump .starts fine runs good until full throttle then it starts to lose power and starts to mis .ir I pull choke all the way out it runs great

  • Anonymous Mar 19, 2014

    This tractor was running fine. Then one day it began to lose power and backfire when accelerated. Now it will only start on full choke and will only idle on full choke. If you try to rev it up it dies.there is no black smoke from the exhaust as you would normall expect. The carb is getting fuel a sees clean inside. Unhooking the air filter has no effect on how it runs.????

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  • Master
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Please check your sediment bulb or fue filter going to it..blow the line backward the may be rust in your tank

Posted on Jul 31, 2009

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Many times with a gas mix, after sitting for a while, the mix separates and gums up the carb. Taking the carb off and soaking it overnight in a parts or carb cleaner and running carb cleaner through the tank and gas lines will cure this.

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Look at this forum for tractors.
I hope it helps you!

http://www.tractorforum.com/f192/ih-674-78bhp-running-under-load-issues-17715/

Another thing that can cause this is the carb. It may be getting too much fuel once it's warmed up. An engine needs more fuel when it's cold than it does when it's warm. Cold engines run inefficiently so they need more raw fuel to fire-up, and stay running. This is all a choke does. A choke plate closes-off the air going into the carb which makes the fuel mixture really rich so it can run. Less air = more fuel. You'll also notice that cars with chokes also idle real high until they warm-up. This fast idle and the over rich mixture (due to lack of air), allows the engine to fire up and stay running. As the engine warms-up and starts burning fuel more efficiently, the choke plate begins to open, which slowly lets more air in and leans-out the air/fuel mixture. Once the engine is warmed-up, the choke plate will be wide open allowing the carb to run as it is supposed to with the correct metering of fuel and air.

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I suspect your warm start procedure is the fault, the manual is not correct IMO. Any choke on a warm engine causes flooding, try this, if no better post back or return it for warranty replacement.

Start Procedure
Cold:
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  2. Set compression release – optional step even if saw is equipped with a compression release.
  3. Pull (close) choke, set fast idle (done when choke closed on some saws); pull starter and listen for an attempt to start. once heard (usually two pulls; no more than 4).
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  5. Push (open) choke pull starter until it starts. (usually first pull).
Warm:
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  2. Set compression release – optional step even if saw is equipped with a compression release.
  3. Pull (close) choke, set fast idle (done when choke closed on some saws) – Do not pull with choke closed.
  4. Push (open) choke, pull starter until it starts. (usually first pull).
If you have more questions or need additional help please reply below and I will get back to you. Thank you for using FixYa and Good Luck. HTH
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check the carb out clean it and the lines also just to be sure check the sparkplugs

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Sounds like a restriction in your carb, not getting enough gas. I would clean out the carb again.

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