ford 9n tractor

Discussion in 'Shop Talk' started by petefarms, Jan 29, 2005.

  1. petefarms

    petefarms Well-Known Member

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    my tractor starts fine, but after a few moments, shuts down, it has a 12v conversion kit, plenty of gas to carbuerator, electrical, wiring maybe.
     
  2. Farmer Brown

    Farmer Brown Well-Known Member

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    Have had the fail while hot. Coil might too. It'd swap them out. FB
     

  3. Beeman

    Beeman Well-Known Member

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    When it shuts down what does it take to get it to re start? You say it's been converted to 12v, what did you change or add to make this conversion? Did you install a resistor to drop the voltage to the points down?
    When it dies have you checked for electrical power to the coil?
     
  4. moopups

    moopups In Remembrance

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    Next time it shuts off, grab the coil - too hot to hold? Replacement is in order.

    Edited to add; while the coil is a possability there are other things that can cause the engine stopping after a few minutes of operations. One is an unvented fuel tank, if air cannot get in the fuel flow will stop. When it stops pull off the fuel cap and listen for a vacuum sound. Then there also could be a vapor lock in the fuel line, look for heat sources near the fuel line, a wet rag cures this one by takeing away the heat. Pull a spark plug and see if you have spark when the engine is turning over just after it stalls. Make sure there is not a big flake of rust or trash in the fuel tank that would cover the fuel port. Check the fuel shut off, located under the hood above the engine usually mid way of the block from the left side, it has two positions, one for run the other for reserve, see that it is in the correct position.
     
  5. John Hill

    John Hill Grand Master

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    Before you ditch the coil check that it is connected correctly. It is possible to have the primary (i.e. the low voltage) connections reversed and still have the motor run. Also make sure the body of the coil is grounded.
     
  6. agmantoo

    agmantoo agmantoo Supporter

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    Many of these tractors have a brass fitting where the fuel line attaches to the carb. Inside that fitting is a screen filter. Trash accumulates in this screen and only a small amount of gas can enter. When the engine is off, the small amount fills the carb bowl and when you start the tractor it will run fine until this small reservoir of fuel is consumed. Be careful as you remove the fuel line as the nut will "round" off. If the brass fitting is tight it needs to be removed with a box end as that will distort with an open end wrench.
     
  7. rambler

    rambler Well-Known Member Supporter

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    Does it start right up again, or does it need to sit about a 1/2 hour & then start?

    By 'a few moments' is it running about long enough to back out of the shed? Or long enough to get to operating temp?

    What's happened fairly often to me is the needle valve in the carb sticks, and even tho the float drops, the needle does not allow fuel to flow. The fuel __real slowly_ seeps around the needle, & it fires up & runs again in 1/2 hour. It will run about a minute or so.

    Sometimes a good sharp rap with a metal object on the carb will loosen it, & all will work fine again - for a while. Be careful not to break the carb, and you need to replace the needle valve to really fix it....

    If the tractor temp or it runs for longer periods or any such else affects it's running, than this would not be the cause.

    --->Paul
     
  8. herefordman

    herefordman Well-Known Member

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    there is also a strainer in the fitting that screws into the bottom of the tank, is there something loose floating around inside the tank ?
     
  9. petefarms

    petefarms Well-Known Member

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    thanks for all the help, been working overtive time this week and havent gotten to the tractor yet, but i also thought it was the coil, will have to check it out.