Cub Lo-Boy 154 Carb on an F-Cub?

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Cub Lo-Boy 154 Carb on an F-Cub?

Postby Rudi » Wed Nov 07, 2012 10:47 am

I know that there are jet differences between the Numbered Series IH 3/4" Updraft carb and the regular IH carbs. Are there any issues with say using a 154 carb on an early -- '47, '48 or '49 Cub?
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Re: Cub Lo-Boy 154 Carb on an F-Cub?

Postby Landreo » Wed Nov 07, 2012 12:16 pm

Well I learned something today. I always thought they were the same basic carb. Eitherway, I would think a newer 154 carb would work on a older cub. The choke lever may need to be flipped to the other side.
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Re: Cub Lo-Boy 154 Carb on an F-Cub?

Postby Former Member » Wed Nov 07, 2012 12:22 pm

The butterfly being larger if not positioned perfectly will hit the intake manifold lip. Double the gasket for clearence and you will be fine.
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Re: Cub Lo-Boy 154 Carb on an F-Cub?

Postby Boss Hog » Wed Nov 07, 2012 12:22 pm

you will need to change the choke shaft
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Re: Cub Lo-Boy 154 Carb on an F-Cub?

Postby Bob McCarty » Wed Nov 07, 2012 12:56 pm

With the larger jet, it may run rich.

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Re: Cub Lo-Boy 154 Carb on an F-Cub?

Postby cub47 » Wed Nov 07, 2012 1:36 pm

did IH use a Zenith carburetor on the numbered series Loboys?
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Re: Cub Lo-Boy 154 Carb on an F-Cub?

Postby Jim Becker » Wed Nov 07, 2012 1:50 pm

cubguy47 wrote:did IH use a Zenith carburetor on the numbered series Loboys?

184 only.
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Re: Cub Lo-Boy 154 Carb on an F-Cub?

Postby Buzzard Wing » Wed Nov 07, 2012 7:56 pm

There are a bunch of different Zenith carbs. I have one that came on my Lo Boy and like it a lot. They do seem to be a little more finicky when the Cub is cold, but I still prefer it.

They were also standard on the long stripe Cubs, with a slightly different manifold (larger intake hole) and a choke cable vs a rod/lever.

Possibly looking at the parts manual will answer some questions??
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Re: Cub Lo-Boy 154 Carb on an F-Cub?

Postby Rudi » Wed Nov 07, 2012 8:11 pm

I am looking for a carb for a friend up here whose carb somehow mysteriously disappeared during the rebuild process.

Boss Hog wrote:you will need to change the choke shaft


That won't be a big deal as I already have the parts. Unfortunately I didn't get an answer from Roscoe early enough so I missed a good one. Thankee - you know who.
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Re: Cub Lo-Boy 154 Carb on an F-Cub?

Postby Eugene » Wed Nov 07, 2012 10:06 pm

I have a 154 Cub Low-boy with a Zenith carburetor. Pulled the 154 into the shop today to work on. Actually haven't done anything with or on the 154 since I purchased it this spring as a winter project.

Starts a bit hard but runs ok once warmed up. Needs a tune up.

Parts book, TC 131, shows a Zenith carburetor for the 184 and 185 Low-Boy tractors. Same parts book shows a 3/4" updraft IH carburetor for the 154 Lo-boy tractors.
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