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Farmall & IHC Tractors Discussion Forum
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BN CARB.blues

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farmerjohninpa

01-30-2006 20:22:35




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i have the motor running nice,idles nice,accelerates and runs nice at high speed ! the problem is the choke has to be 3/4 of the way on to do this. history; when i bought the tractor the carb was laying apart on the bench with a few other carbs, the others being different series and they were whole. i have worked and rebuilt carbs of this sort for 30 some years so its not something i`ve missed. the motor has 85 psi per cylinder compression, leak down test on valves performed and is good, manifold removed and plated and tested for leaks and passed,new gaskets placed on before reinstallation. my question is this could the 2 brass orifices in this carb,or one, be the wrong size seeing as they are replaceable ???? does anyone know what size the holes should be in these orifices. one in the bowl and the other larger one in the top half of carb.?? only thing i can come up with at this point is these are not the original ones.does anyone know someone i could call who would know these sizes or is anyone reading this know what size they are. appreciate any help, this old man only has a few hairs left on the top and this carb. has me stumped. p.s. timing is on and all new plugs, wires, points and condenser.

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rustytractors

01-31-2006 08:53:57




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 Re: BN CARB.blues in reply to farmerjohninpa, 01-30-2006 20:22:35  
Did you ever figure out your carb problem. I have a H that is doing the same thing to me. I have been working on these things all my life and haven't figured out this one yet. I think I am going to have to replace the screws in the carb pretty soon as they are going to be wore out from taking it apart so many times!! Thanks



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farmerjohninpa

01-31-2006 19:20:55




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 Re: BN CARB.blues in reply to rustytractors, 01-31-2006 08:53:57  
rusty, i`ll let ya know in a day or 2, gonna go with the gut and ream out the orifices. all venturies holes are clear everythhing else checks out , so i`m a gonna start to ream until it runs with out a choke on . keep ya posted



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rusty tractors

01-31-2006 19:49:38




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 Re: BN CARB.blues in reply to farmerjohninpa, 01-31-2006 19:20:55  
Thanks, I will watch for the progress



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Bob

01-31-2006 03:01:07




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 Re: BN CARB.blues in reply to farmerjohninpa, 01-30-2006 20:22:35  
Some of those little carbs have a diagonal passage deep down inside that is not readily apparent, and does not clean up well, unless you figure it out, and how to run a wire through it to clean it.



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farmerjohninpa

01-30-2006 21:07:35




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 Re: BN CARB.blues in reply to farmerjohninpa, 01-30-2006 20:22:35  
p.s. the carb is a marvel shebler tsx-157 -69401-d which should be the right one.



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Farmer Bob

01-30-2006 21:25:09




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 Re: BN CARB.blues in reply to farmerjohninpa, 01-30-2006 21:07:35  
Did you check the internal passages of the intake portion of the manifold for mud dauber nests, etc.?



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