VCCA Home Forums TECHNICAL - 1945 AND EARLIER 1933-1936 Another W1 carburetor question

The throttle cable on my 36 Master was cut off when I got it, and I'm now reattaching. I found the clamp for the throttle cable that attaches at the base above the manifold in a box of spare parts. Problem is that the throttle shaft and lever assembly is in the way of the clamp. It appears that someone installed a later version of the W1, since it has an angled lever, not straight like the ones on 36s that I've seen. I found a "parts" grade W1 carburetor with the correct straight shaft/lever assembly. Is this easy to replace? Can I just tap it out, or do I need to disassemble the carburetor?

Hey Joxeppi,

You need to remove the carb to change the shaft. Take it off the car, remove the link to the top of the carb. Turn the carb over and remove the two screws holding the throttle plate and remove the plate. Then the shaft will come right out.

Next question, do you have the right carb to start with? You want a 36, I can't remember the number right now, or a 569S which is a good replacement.

If your present carb. has a one piece choke valve and a little tube running at an angle in the top - center of the throat it is a 1941-48 carb. which is a 569S. The throttle shaft and throttle plate and lever from a 1936 carb. will not work as the 569S 0r 1941 and up carb. has a larger throttle bore (and plate).
I would guess you could use just the 1936 shaft and refit the larger throttle plate to the shaft.

The correct carburetors for 1936 are the Model 319-S, or the Model 334-S. For the economy models a Carter 335-S was used.

And, after removing the throttle connector rod as Brucie suggested, don't forget to remove the throttle shaft arm as well. Then the throttle shaft can be removed from the carburetor body.

My current carb does not have a tag any longer, but based on Gene's description and the number of holes in the bowl cover, it's probably a 569S. I bought a kit a while back and replaced what I could, but it does leak a bit from the rivets in the bottom. So now I have a decision to make:

I just got the parts carb today and it is definitely a 319 (part # on tag is 837894). It looks to be rebuildable, so that's an option, but I've read that these are not the most reliable, and the 569S has several improvements.

I also have a professionally rebuilt carb in storage that is a 420 (1939), so it should have the same throttle bore and plate as the 319, and I could used the 36 throttle shaft/lever on the 420, correct?

So which one would you go with.

If it h does not have the straight lever it is not a 569S but assuming it is a 1941-48 carb it would be the same as a 569.
You could use a 1936 throtle shaft and lever on the 1939 carb.
You could also remove just the 1936 lever and attach it to the shaft of any of the later carbs.

I guess that would make it a 574S. Any advice on how to remove just the lever? It appears to be pressed on to the end of the shaft.

The lever is not removable and it should not be removed. You need to change the complete shaft with the lever.

Update on the carburetor throttle arm....

As Gene said, I can't use the shaft and lever from the 36 carb on the carb that is currently on my car (>1941). The latter throttle bore is just slightly larger. I decided that the best approach at this point was to simply re-tool the angled lever. I straightened it, then cut off the excess, rounded it off and drilled a hold for the arm. Temporary fix til I get the correct carb on the car, but it works. In the process, however, the press fitting where the arm connects to the shaft came loose, and pressing it again simply pressed the shaft through. I had to weld this back on. It works though.

That's why the throttle arm should never be removed from the throttle shaft.