Air vent on YS 637 carb

Mjfire1949 · Posted: Tue May 13, 2014 5:24 pm Post subject: Air vent on YS 637 carb

I am looking for a picture showing the plumbing for the air vent on a YS637 carburator on my M38. I want to replace the WO that is currently installed. I know it goes to the breather, but I'm not sure where.

OKCM38CDN · Posted: Tue May 13, 2014 5:38 pm Post subject:

If I remember correctly, the vent line goes from the Y637 vent at the top of the carb to the port on the cross over tube. The line is 13 inches long and can be made of 3/16" steel or copper tubing with inverted flare nuts on both ends...

Hope this helps...
_________________
Hal, KB1ZQ
TSGT, USAF (Ret)
1952 M-38 CDN CAR 52-31313
1952 M-100 Strick #104
1951 Willys Wagon (For Sale)
1954 Willys M38A1 201001205
Tornado Alley
Del City, OK

Mjfire1949 · Posted: Tue May 13, 2014 9:26 pm Post subject:

Thanks OKC.

wesk · Posted: Tue May 13, 2014 10:02 pm Post subject:

There are many illustrations showing the vent tube's routing. Quite a few in your basic 4 volume manual set for the M38. TM 9-8012, TM 9-1804A, TM 9-1804B and ORD 9 SNL G-740. All of these manuals are available free to you on our downloads page.

My photo album (first one in our album site offers several hundred technical photos that will answer 90% of the questions that are posted here.
http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php

This is Fig 4 from TM 9-1804B page9.

The tube is shown in all the following tech references as well.

TM 9-1804B Fig's 3 (Pg Cool

, Fig 2 (Pg 6). TM 9-1804A Fig 1 (Pg 4), Fig 7 (Pg 1 Cool

, Fig 15 (Pg 23), Fig 29 (Pg 36). TM 9-8012 Fig 21 (Pg 79), Fig 22 (Pg 80), Fig 23 (Pg 107), Fig 24 (Pg 108), Fig 28 (Pg 115), Fig 29 (Pg 116), Fig 34 (Pg 127), Fig 44 (Pg 152), Fig 45 (Pg 153). Finally in the Parts Manual ORD 9 SNL G-740 fig 01-1 Page 11.
_________________
Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php

Mjfire1949 · Posted: Wed May 14, 2014 8:36 am Post subject:

Many thanks Wesk. I was just approved to view the downloads yesterday. I am starting to feel my way around the site. Again, thanks. I have located the port on the crossover tube. It was blocked off, but is still useable.


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