641 carburetor

greyphase

New User
I want to get a rebuild kit for my 1957 641's carburetor but can't figure out which Marvel or Marvel-Schebler carburetor is on it. Yesterday's Tractor shop shows different kits for different carburetor's. Is there somewhere on the carburetor that shows me which carburetor it has?
 
My naa which I think is the same carb was giving me fits starting it. still 6 volt. I was going to rebuild it but the complete kits were 30 and up I bought a new carb from ebay for 60 bucks shipped. works great. starts right up in 20 degree weather. my carb didn't look as though it had ever been worked on . there were no tag. just marvel casting on the carb. I did the same thing on my 960 about 8 years ago. bought a zenith for it. t it starts right up at 10 degrees. just my thought.
 
You have two carburetors laying on the bench doing nothing?? How much do you want for them? Email should be open.
 
"Is there somewhere on the carburetor that shows me which carburetor it has?"

Yes, look for a tag like this one on the exterior side of the carb.
This one is a Jubilee carb, which is different from yours, but the tag should
be in the same place. Sometimes, unfortunately, they are missing.
In this case, TSX-428 is the model number. 3 53 month and year.

12700.jpg


Other Marvel Schebler carbs had the tag located here too.
Just in case someone has gone way off base with yours.

12703.jpg
 
(quoted from post at 17:48:17 03/12/18) "Is there somewhere on the carburetor that shows me which carburetor it has?"

Yes, look for a tag like this one on the exterior side of the carb.
This one is a Jubilee carb, which is different from yours, but the tag should
be in the same place. Sometimes, unfortunately, they are missing.
In this case, TSX-428 is the model number. 3 53 month and year.

12700.jpg


Hey Royse...what kind of paint do you put on those rebuilds?

Other Marvel Schebler carbs had the tag located here too.
Just in case someone has gone way off base with yours.

12703.jpg
 

I saved a chart from The Carburetor Shop a few years ago when I was shopping for a carb kit. According to them, a 1957 641 should have a TSX 580.

Here's the TSX 706 from my 860; a tag in that position could easily get lost during a rebuild.

mvphoto12712.jpg
 
(quoted from post at 19:00:52 03/12/18) It sometimes varies based on color selection Mike.
Usually high temp ceramic.

Oh ok Thanks...love the depth and glossiness of the red. So it's like header paint?
 
"Here's the TSX 706 from my 860; a tag in that position could easily get lost during a rebuild."

A tag like the one pictured I call a "toe tag". Typical on aftermarket carbs.
 
(quoted from post at 22:04:15 03/12/18)
(quoted from post at 19:00:52 03/12/18) It sometimes varies based on color selection Mike.
Usually high temp ceramic.

Oh ok Thanks...love the depth and glossiness of the red. So it's like header paint?
Yes sir. Exactly that if I can find it in the requested color.
 
(quoted from post at 19:08:11 03/12/18)
(quoted from post at 22:04:15 03/12/18)
(quoted from post at 19:00:52 03/12/18) It sometimes varies based on color selection Mike.
Usually high temp ceramic.

Oh ok Thanks...love the depth and glossiness of the red. So it's like header paint?
Yes sir. Exactly that if I can find it in the requested color.

I'm wondering the model number of my 640 carb... any idea?

12715.jpg
12716.jpg
 
(quoted from post at 22:28:02 03/12/18)
(quoted from post at 19:08:11 03/12/18)
(quoted from post at 22:04:15 03/12/18)
(quoted from post at 19:00:52 03/12/18) It sometimes varies based on color selection Mike.
Usually high temp ceramic.

Oh ok Thanks...love the depth and glossiness of the red. So it's like header paint?
Yes sir. Exactly that if I can find it in the requested color.

I'm wondering the model number of my 640 carb... any idea?
Without the tag or casting numbers I can't be sure but it does
have the sediment bowl mounted to the rear, so not a 428.
Top half has Marvel Schebler cast in, so I'd peg that as original.
Bottom half may be original too or may have been replaced.
Best guess from the pictures, I'd say a 580.
I can dig out my books if you really want to ID it for certain.
 

Royse, you're definitely a carburetor guru -- do you think that 706 carb is a reproduction? It has "marvel schebler" cast into the top . . .

I replaced the original TSX 593 because someone had put a pipe plug in the drain and cracked the casting. I figured it wasn't fixable and I couldn't locate a bottom casting. Maybe I was wrong?

mvphoto12841.jpg
 
(quoted from post at 19:15:30 03/13/18)
Royse, you're definitely a carburetor guru -- do you think that 706 carb is a reproduction? It has "marvel schebler" cast into the top . . .

I replaced the original TSX 593 because someone had put a pipe plug in the drain and cracked the casting. I figured it wasn't fixable and I couldn't locate a bottom casting. Maybe I was wrong?

mvphoto12841.jpg

Just me but I would grind a vee over the crack and braze it
 

Yeah, if that's possible, maybe I can get the machine shop to try it. I guess I thought the plug would never seal because of the crack.
 
I would think the top half is original Josh. Bottom may be too.
Sometimes the tag gets lost or broken and rebuilders use a toe tag.

Usually when the drain hole gets cracked, the crack stays together
until the plug is tightened, then it spreads. On those, I have had
some luck brazing the crack shut. Yours looks to be open with the
plug out, so I don't know if that would work for yours.

I don't know if I have a 593 bowl out here either, but I'll look when
I'm out in the shop tomorrow after work.
 
Forgot to mention, I used thread sealer on them after brazing.
Gasoila or similar paste type sealer made for use with gas.
And I replaced the plug with a brass petcock to drain them.
 

Hi Royse -- that's interesting, thanks for the info! So you can buy carburetor "toe tags?" What a niche item.

I guess I should confess, I probably made that crack worse. When I first got the tractor the carb drain was leaking a little bit. I gave the plug a twist without thinking it might not be brass, and . . . well, you see what happened.

If you do happen to come across a 593 bowl (and are willing to part with it), I'd surely be interested. It'd be good to go back to the original carb. My local tractor shop tried to modify a non-593 bowl to work with the original top casting. It kept leaking so I finally tracked down the 706 and went with that. Here's the original 593 top with the modified bowl.

mvphoto12845.jpg
 
"So you can buy carburetor "toe tags?" "

I honestly don't know if they buy them or make them.
I don't use them myself.
Here are a few examples of them though.
RE- for replaces maybe? Those two are aftermarket.
The center picture is of an original MS TSXU-833. I don't know
for certain that the tag is original, but it is obviously different.
Rounded corners, stamped MS and made in USA, etc.

12846.jpg


12848.jpg


12849.jpg
 
I got a chance to look tonight Josh, I do not have one.
Where was your 593 leaking? Maybe we can fix that one.
 
(quoted from post at 19:08:11 03/12/18)
(quoted from post at 22:04:15 03/12/18)
(quoted from post at 19:00:52 03/12/18) It sometimes varies based on color selection Mike.
Usually high temp ceramic.

Oh ok Thanks...love the depth and glossiness of the red. So it's like header paint?
Yes sir. Exactly that if I can find it in the requested color.

Hey Royse..got a few carb pre painting questions...could you call me at home 541-747-7499 or just email me at [email protected]
 
(quoted from post at 19:55:05 03/14/18)
(quoted from post at 19:08:11 03/12/18)
(quoted from post at 22:04:15 03/12/18)
(quoted from post at 19:00:52 03/12/18) It sometimes varies based on color selection Mike.
Usually high temp ceramic.

Oh ok Thanks...love the depth and glossiness of the red. So it's like header paint?
Yes sir. Exactly that if I can find it in the requested color.

Hey Royse..got a few carb pre painting questions...could you call me at home 541-747-7499 or just email me at [email protected]

That email is [email protected]
 
(quoted from post at 22:55:05 03/14/18)
(quoted from post at 19:08:11 03/12/18)
(quoted from post at 22:04:15 03/12/18)
(quoted from post at 19:00:52 03/12/18) It sometimes varies based on color selection Mike.
Usually high temp ceramic.

Oh ok Thanks...love the depth and glossiness of the red. So it's like header paint?
Yes sir. Exactly that if I can find it in the requested color.

Hey Royse..got a few carb pre painting questions...could you call me at home 541-747-7499 or just email me at [email protected]
Email sent!
 

Hi Royse. Thanks for looking! My 593 bowl was leaking from the drain plug. It's that crack you can see in the earlier post. Otherwise it was fine. If you think it might be fixable, I could certainly send it to you. If you want to email me about it, you can write me at my name (first.last) @gmail.com (just use joshua instead of josh in the address). Thanks again!
 

Dunno if Greyphase is still following this thread, but CTPhil is right! I misread the Carburetor Shop list; the 580 kit is for a 1957 640; the 765 kit is for the 641. I forgot the early 641s were 1957 models too. Hope you get what you need!
 

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