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willysmjeeps.com :: View topic - M38A1 carb rebuild question
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M38A1 carb rebuild question

 
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swampy
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Joined: Sep 28, 2010
Posts: 38

PostPosted: Fri Dec 01, 2017 3:11 pm    Post subject: M38A1 carb rebuild question Reply with quote

Hallo all, finished rebuilding my carbburetor, and find an extra " Checkvalve laying about......oldtimers has got me pretty bad obviously....reckon where it goes? screw in type......~ Swampy~
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Scott
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wesk
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Posts: 13031
Location: Wisconsin

PostPosted: Fri Dec 01, 2017 3:48 pm    Post subject: Reply with quote

Can you ID it from the parts list drawing? If you can which index number is it?




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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
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swampy
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PostPosted: Sat Dec 02, 2017 7:08 am    Post subject: m38A1 carb Reply with quote

It looks like AK? not really sure, as its hard to make out in the picture.
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4x4M38
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PostPosted: Sat Dec 02, 2017 7:27 am    Post subject: Reply with quote

Scott,
Do you have the Ord 9 downloaded on your computer?

Sometimes enlarging pages there helps, sometimes not.
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Brian
1950 M38
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4x4M38
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PostPosted: Sat Dec 02, 2017 7:39 am    Post subject: Reply with quote

Take a look at the 6th page down:

http://www.willysmjeeps.com/downloads/YScarb.pdf

Intake check valve?
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Brian
1950 M38
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wesk
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PostPosted: Sat Dec 02, 2017 11:06 am    Post subject: Reply with quote

The photo I posted was the middle size one from my album.

My album is the 2nd photo album in "Members Albums" and I have close to a thousand technical photos indexed by make / model and or topic / system.

By going to my album, http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php and finding the photo I posted you can then open and/or download the largest version of it. I don't post the largest version in board replies because it eats up way to much bandwidth and makes the viewing of the Board's post much more difficult. In this case the largest version of my posted photo is:
http://willysmjeeps.com/v2/modules/gallery/albums/album115/IPL_Pg_62.jpg



The intake check valve is the slotted & threaded jet with a ball inside of it.
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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
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swampy
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PostPosted: Sat Dec 02, 2017 1:49 pm    Post subject: M38A1 carbburetor Reply with quote

the check valve turned out to be the old one.....however, still have to pull out the choke a ways to keep it running.....checked, and double checked everything again, but see nothing incorrect.....i have built a few over all these years on 4or 5 A1's withought any problems......this one just does not want to participate....lol ~ Swampy~
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4x4M38
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PostPosted: Sat Dec 02, 2017 3:09 pm    Post subject: Reply with quote

Cold or warmed up?
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Brian
1950 M38
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4x4M38
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PostPosted: Sat Dec 02, 2017 3:10 pm    Post subject: Reply with quote

Sounds like extra air getting in there from somewhere.
Or not enough fuel.
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Brian
1950 M38
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wesk
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PostPosted: Sat Dec 02, 2017 6:01 pm    Post subject: Reply with quote

Can we assume you have checked fuel pump pressure and flow rate?

Can we assume you have done a propane vacuum leak check?
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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
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