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Carter W-1 Identification.
The Carter W-1 used a tag attached to the top of the carburetor. The carburetor number would be stamped on this tag and looks like xxxS. That is 3 numbers followed by a S. When the tag is missing watch the video below to identify the correct carburetor kit.


Carter W-1 Carburetor Kit

Watch a video about how to determine which is the correct kit for your W-1 carburetor.


Watch a video about the W-1 accelerator pump.


W-1 Vent
Some W-1 carburetors will have this part.

It is an "anti-percolator valve" according to Carter nomenclature, or simply a bowl vent valve to the rest of us. It is triggered to close (pop up) when the accelerator pump is activated and to open (pushed down) when the throttle position returns to idle.  Just be sure it moves up and down freely.
Carter Carb Parts

Carter W-1 Identification
342S - Oldsmobile 2 float bowl screws showing. Vacuum port on the Carter W-1 stamped side.CARBURETOR KIT
Carter W-1 CarburetorCarter W-1 CarburetorCarter W-1 CarburetorK4062
395S - Studebaker 2 float bowl screws showing. Large brass nut on the top of the inlet. Vacuum port on the Carter W-1 stamped side.
Carter W-1 CarburetorCarter W-1 CarburetorCarter W-1 CarburetorK4062
420S - Chevrolet 3 float bowl screws showing. No vacuum port on the Carter W-1 stamped side.
Carter Carburetor W-1Carter W-1 CarburetorCarter W-1 CarburetorK4062


Carter W-1 Carburetor Manual

Carter W-1 Climatic Control Carburetor Manual

 
Carburetor NumberApplicationFloat LevelMetering Rod
212S, 235S
1932 Chevrolet Confederate
3/8"
75-60 56-45
222S
1932 Confederate Truck
3/8"
75-54 66-62
222SA
1932 Confederate Truck
3/8"
75-66 65-62
259S
255S
266S
260S
282S3/8"75-107
284S
285S
282S
299S3/8"75-120
306S
280S
291S
290S
298S
295S
308S-336S
309S3/8"75-106
310SHudson 1935 HT, HU HHU3/8"75-107
311S
312SHudson 1935 GH3/8"75-141
314S
315S
319S
327S1/2"75-175
330SHudson 1936 64, 65, 66, 673/8"75-159
334S
319S
334S
316S
321S
321S
322S
324S
339S3/8"75-175
340S
330S
331S
331S-348S
348S
329S
309S
327S
335S
335S
333S
342S3/8"75-175
350S
351S3/8"75-194
346S
346S
352S
352S
222S
425S
259S
285S
291S
307S
435S
351S
385S3/8"75-194
464S
394S
395S
364S
359S
371S
360S
378S
388S3/8"75-262
391S
391S
437S
397S
437S
400S
401S
401S
398S
411S1938 Hudson 1123/8"75-336
417S1938 Hudson 1123/8"75-336
418S
420S
434S
438S
438S
400S
483S
492S
515S
570S
574S
569S
616S
523S
684S
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