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Farmall & IHC Tractors Discussion Forum
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Model A only runs on 2 cylinders

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maparus

06-24-2006 16:03:32




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I bought my Farmall Model A about 6 years ago to keep a field mowed, haul firewood, and clear the snow. It always did smoke a little. I would just have to clean #1 and #4 plugs now and then. Last week while cutting to field all of a sudden lost power and started to miss. I figured it was time to clean a plug again. Made it back to the barn checked all the plugs. #1 was wet but no carbon. #2 ok. #3 ok. #4 wet but again no carbon. I changed the plugs stared it up but the same problem. Changed plug wires same problem. I started it up and started to remove plug wires one at a time. I found out by leaving off plug wire #1 and #4 the engine ran smooth when I put either wire back on the miss came back with both wires on it ran real rough. Take off #1 & #4 wire the engine smoothed out again. I ran a compression test all cylinders were 95 lbs.

thanks for any help

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old

06-24-2006 21:03:05




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 Re: Model A only runs on 2 cylinders in reply to maparus, 06-24-2006 16:03:32  
Maybe crossed wires as mag said or maybe its time to bite the bullet and buy new plugs. Once a plug gets fouled its toast and need to be replaced and if you haven't replaced them in say 2 years its time any how



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Dellbertt

06-24-2006 20:41:33




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 Re: Model A only runs on 2 cylinders in reply to maparus, 06-24-2006 16:03:32  
I did a similar thing on a Wisconsin 4.
Make sure you got the wires back on in the right order and make sure the rotor is turning in the direction you think it is.



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centaur

06-24-2006 17:12:33




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 Re: Model A only runs on 2 cylinders in reply to maparus, 06-24-2006 16:03:32  
ck inside distributor cap for a thin line indicating cross fireing.



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MAGMAN

06-24-2006 16:22:00




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 Re: Model A only runs on 2 cylinders in reply to maparus, 06-24-2006 16:03:32  
Have you tryed switching those wires on the termanells sounds like you may have crossed them. Otherwise maybe you can try a new cap maybe sparking between inside.



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