51 ford 8n carb

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I have a 51 ford 8n with a tsx 361a carb. It only starts when the throttle is wide open and the choke is on. Once it starts it runs fine. I've read that the 8n uses a tsx 33 or tsx 241 carb. Could having the wrong carb cause this problem?

 

[old]

I have a 51 ford 8n with a tsx 361a carb. It only starts when the throttle is wide open and the choke is on. Once it starts it runs fine. I've read that the 8n uses a tsx 33 or tsx 241 carb. Could having the wrong carb cause this problem?

Yes if the carb is one that was used on a smaller engine it could be your problem and it lacks the fuel flow to run it correctly

 

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Thanks

 

[deanostoybox]

I have a 51 ford 8n with a tsx 361a carb. It only starts when the throttle is wide open and the choke is on. Once it starts it runs fine. I've read that the 8n uses a tsx 33 or tsx 241 carb. Could having the wrong carb cause this problem?

tsx 361a was used on a TO 20. The jets are a different sizes than the carburetors used on the 8N. Otherwise as far as I know basically the same "small bowl TSX". You can rebuild it to TSX 241b specifications using the kit from Tisco:

Ford 8N Carburetor Kit, Complete - C546V

Ford 8N Carburetor Kit, Complete for sale, C546V. For tractor models from 1939 to 1952, carburetor part #: Marvel-Schebler TSX241A, TSX241B, and TSX241C, Ford 8N9510C. Kit contains parts necessary for major carburetor overhaul, including a Viton float valve. For 8N, 9N, 2N. Does Not include...

www.yesterdaystractors.com

And it should preform just like the carb that cam on it from the factory.
That said, however, I don't know if the starting problem you describe is necessarily caused by the carburetor.

 

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I will try that first. Thank you

 

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I will try that first. Thank you

I have not rebuilt the carburetor yet but was wondering if there could be another reason why my 8n starts only when full throttle with choke on? I sometimes get an idea in my head and don't read the whole text. I totally missed the part of the thread where Denostoybox said that the carb may not be the problem.

 

[old]

I have not rebuilt the carburetor yet but was wondering if there could be another reason why my 8n starts only when full throttle with choke on? I sometimes get an idea in my head and don't read the whole text. I totally missed the part of the thread where Denostoybox said that the carb may not be the problem.

Weal spark can be masked by a carb set/working on a rich mixture. You need to check your spark and make sure you have a good blue/white spark that jumps a 1/4 inch gap or more at ALL the plug wires

 

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Thank you for the advise. Sounds like that would be a good place to start before tackling the carb.

 

[Indiana Ken]

I have a 51 ford 8n with a tsx 361a carb. It only starts when the throttle is wide open and the choke is on. Once it starts it runs fine. I've read that the 8n uses a tsx 33 or tsx 241 carb. Could having the wrong carb cause this problem?

My 8N likes to start with an open throttle. For starting; I turn on the key switch, open the throttle to 1/2 - 3/4 open, push the starter switch, pull the choke full on while the engine is cranking. It typically it starts when the choke is pulled on. Note, when the engine is not running the governor will open the throttle to full on with a part throttle sitting of the throttle lever.

To me if an engine likes to start without the choke it is a possible indication of over rich fuel condition.

 

[Eman85]

We make guesses on a 70yo old piece of equipment, they have all worn differently and been modified too. Compression has a lot to do with how it starts along with spark and fuel mixture.

 

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Thanks for the info. Decided to check spark today so I put the throttle in idle position knowing it wouldn't start. Pushed the starter button and it fired right up. Checked all four plug wires and it started each time with the throttle in the idle position. Spark was a good blue between the 1/4" gap. First time in the 2 years I have had the 8n that this happened. So I scheduled an appointment with my therapist. Lol. Will keep you posted.

 

[HFJ]

Thanks for the info. Decided to check spark today so I put the throttle in idle position knowing it wouldn't start. Pushed the starter button and it fired right up. Checked all four plug wires and it started each time with the throttle in the idle position. Spark was a good blue between the 1/4" gap. First time in the 2 years I have had the 8n that this happened. So I scheduled an appointment with my therapist. Lol. Will keep you posted.

for what little it's worth, i start mine at about 1/3rd throttle. i turn on the key, push the starter button for 2 or 3 revs, and then pull out the choke for a second or two.

it wouldn't surprise me if there were MANY ways to do it, some of which will only work on certain ones.