Zenith carb 13880 correct for 172ci

338ftw · Jan 12, 2020

I was going to order a carb kit for my tractor tonight. I found the part number 13880. Everything I find says it s for the 134ci engine. Since I have the 172ci does this mean it s not the correct carb? If so what is the correct carb for this engine?

Royse · Jan 12, 2020

Let me start by telling you I'm no expert on Zenith carb numbers.
What I know about the 172 engines though, is that some of the
early ones, like on the 800/900 used a smaller carb and manifold
than did the later ones like the 801/901/4000 four cylinder 172's.
The 134 carbs fit the early manifolds and work fine under most conditions.

Later, Ford got a small boost in horsepower by using a larger carb
and intake manifold. The larger ones obviously burn more fuel to
add that HP. The whole setup, with manifold, will interchange.

So if it works for you as is, use it. If it needs to be rebuilt, rebuild it.
If you're looking to get the "correct" one, it would have been a
Marvel Schebler, not a Zenith at all. Which MS would depend on
the tractor and intake. Disclaimer - Industrial engines may differ.

338ftw · Jan 13, 2020

(quoted from post at 21:47:31 01/12/20) Let me start by telling you I'm no expert on Zenith carb numbers.
What I know about the 172 engines though, is that some of the
early ones, like on the 800/900 used a smaller carb and manifold
than did the later ones like the 801/901/4000 four cylinder 172's.
The 134 carbs fit the early manifolds and work fine under most conditions.

Later, Ford got a small boost in horsepower by using a larger carb
and intake manifold. The larger ones obviously burn more fuel to
add that HP. The whole setup, with manifold, will interchange.

So if it works for you as is, use it. If it needs to be rebuilt, rebuild it.
If you're looking to get the "correct" one, it would have been a
Marvel Schebler, not a Zenith at all. Which MS would depend on
the tractor and intake. Disclaimer - Industrial engines may differ.

Thanks for the info. Gives me food for thought.

Tim PloughNman Daley RIP · Jan 15, 2020

All FORD Tractors starting with the N's and continuing with the Hundred Series used Marvel/Schebler TSX model carbs -never the Zenith or Holly models. The Thousand Series may have used them - I'm not sure -but Ultradog would know that answer. The FORD TRACTOR 134 CID OHV engine used the M/S TSX 428, 580, 692, 765 carb models. 172 CID OHV engines, all used the M/S TSX 593, 706, 771, 662, 769, and 813 (4000 too) on various models. Finding anyone of these OEMs is not easy and not cheap when they are found. I can't say if your Zenith p/n is correct or not but Zenith carbs were used as aftermarket substitutes on all Ford models. I have a Zenith cross reference list somewhere but will have to look for it.

Tim *PloughNman* Daley(MI)

Sean in PA · Jan 15, 2020

The pre-1965 2000/4000 series still used the Marvel Scheibler carbs, and the 1965+ thousand series used Holley carbs, but at some point Ford spec'd Zenith carbs as replacement carbs for the 1965+ tractors. I think they struck some kind of deal with Zenith for the earlier tractors at some point as well, or else Zenith just started making replacements for the M-S carbs on their own.

Zenith carb 13880 correct for 172ci

338ftw

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Royse

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338ftw

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Tim PloughNman Daley RIP

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Sean in PA

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