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Ford 9N, 2N & 8N Discussion Forum
Show Parts for Model:

MS Carb Differences

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Grand Valley Tractor

05-08-2009 12:35:51
12.168.206.38



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OK...this has driven me nuts a few times, so I decided to document it then share it with y'all.

There are 2 "complete rebuild" kits for the 9N, 2N, 8N MS carbs at Tisco...C545V and C546V. The former is for TSX33, the latter for TSX241A, B, C.

Inevitably, the tag is torn off or unreadable...so how do you know which is which?

Follow the dimensions in this pic...

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JMOR

05-09-2009 08:16:15
72.181.158.237



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 Re: MS Carb Differences in reply to JMOR, 05-08-2009 12:35:51  
Thank you Dell. That is what I thought, but Gaspump's mention of "metering holes in barrel", somewhat threw me, because I thought that these top two pair of holes only flowed air except for that brief moment of acceleration when fuel is emptied from the surrounding 'acceleration well'. The bottom pair providing idle circuit fuel. I think you have cleared that up (confirmed) for me. Thanks.



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JMOR

05-08-2009 17:25:51
72.181.158.237



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 Re: MS Carb Differences in reply to Dunk, 05-08-2009 12:35:51  

Gaspump said: (quoted from post at 19:55:06 05/08/09) The small metering holes in the barrel.


"....are the important thing ..."

Why are those the important thing?



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Dell (WA)

05-09-2009 07:34:21
172.190.102.251



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 Re: MS Carb Differences in reply to JMOR, 05-08-2009 17:25:51  
JMOR.........The 6-holes in the sides of the slanted tube help "emulsify" the mainjet fuel stream by creating "bubbles" and thus creates a more vaporized fuel source to be sucked into yer engine. .........Dell



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rmlarsen

05-08-2009 17:02:12
24.22.165.181



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 Re: MS Carb Differences in reply to Grand Valley Tractor, 05-08-2009 12:35:51  
So, who makes the perfect kit for rebuilding a TSX 33 to a 241B?



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Grand Valley Tractor

05-09-2009 04:53:09
12.168.206.38



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 Re: MS Carb Differences in reply to rmlarsen, 05-08-2009 17:02:12  
From the responses here, I'd say there may be no consensus. I wish I had the time (maybe with a dyno?) to establish the ideal.

I could then rework Tisco kits in our tool room.

Why would a tractor parts dealer have a tool room? We're a business unit of a larger company, ALPTEX, Inc. The tool room has been an excellent resource for developing "NewFerOld" tractor parts, coming to this dealer soon. ;=)

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JMOR

05-08-2009 15:57:28
72.181.158.237



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 Re: MS Carb Differences in reply to jon, 05-08-2009 12:35:51  

Gaspump said: (quoted from post at 18:49:36 05/08/09) First, the number and hole sizes holes in the main nozzle are the important thing and they do look somewhat similar.
This is incredible, almost everyone sells odd and mis-matched parts these days. First off there was no main nozzle change in the 9/2/8N tractor years, all were the same so why are TISCO kits providing different ones or is their QC that poor. The .076 E jet is way big but it would likely work as it's basically a vent anyway, I would never use it. Just TISCOS middle of the road " try these, they should work". All carbs should be rebuilt to the TSX-241B spec as it superceded all other N carbs. Now if only you could rely on your parts supplier.


What nozzle hole sizes do you mean? There is the hole at the tip (venturi end), hole in the base (threaded end) and the six small holes in the barrel.

THX

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Gaspump

05-08-2009 16:55:06
24.110.88.223



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 Re: MS Carb Differences in reply to JMOR, 05-08-2009 15:57:28  
The small metering holes in the barrel.



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Gaspump

05-08-2009 15:49:36
24.110.88.223



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 Re: MS Carb Differences in reply to Grand Valley Tractor, 05-08-2009 12:35:51  
First, the number and hole sizes holes in the main nozzle are the important thing and they do look somewhat similar. This is incredible, almost everyone sells odd and mis-matched parts these days. First off there was no main nozzle change in the 9/2/8N tractor years, all were the same so why are TISCO kits providing different ones or is their QC that poor. The .076 E jet is way big but it would likely work as it's basically a vent anyway, I would never use it. Just TISCOS middle of the road " try these, they should work". All carbs should be rebuilt to the TSX-241B spec as it superceded all other N carbs. Now if only you could rely on your parts supplier.

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JMOR

05-08-2009 14:44:51
72.181.158.237



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 Re: MS Carb Differences in reply to JMOR, 05-08-2009 12:35:51  

Dell (WA) said: (quoted from post at 16:32:32 05/08/09) GVT.......ol'weakeyes hadda blow-up yer picture to visualize yer jets differences. Woulda been nice iff'n you'd "labeled" the jets by function (main, idle, econ) ...or... part number. It is interesting that infact the jet sizes are different. Most casual carb rebuilder ain't gonnna have jet-gauges (drill-stems, eh?) but they can certainly determine which jet goes where by thread sizes. Thanks for posting yer experiences .......Dell


I suppose that after all these years and the absolute proliferation of jet sizes reported by the many, that one is to conclude that these old tractors will 'run' with anything anybody sticks in there. I've seen postings on these boards that posters swear by that cover a size range of 2 to 1. I find that incredible!

If error in my E,I,M identification, I trust someone will fix it.

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Dell (WA)

05-08-2009 13:32:32
172.190.149.181



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 Re: MS Carb Differences in reply to Grand Valley Tractor, 05-08-2009 12:35:51  
GVT.......ol'weakeyes hadda blow-up yer picture to visualize yer jets differences. Woulda been nice iff'n you'd "labeled" the jets by function (main, idle, econ) ...or... part number. It is interesting that infact the jet sizes are different. Most casual carb rebuilder ain't gonnna have jet-gauges (drill-stems, eh?) but they can certainly determine which jet goes where by thread sizes. Thanks for posting yer experiences .......Dell

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