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willysmjeeps.com :: View topic - Massive Carb flooding on M38 Carter
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Massive Carb flooding on M38 Carter
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joebuck
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Joined: Jul 16, 2013
Posts: 153
Location: oxford mississippi

PostPosted: Sun Nov 25, 2018 10:38 am    Post subject: Massive Carb flooding on M38 Carter Reply with quote

I have read several old threads about the topic and looking for your advice. My m 38 was running fine for years then started to run rough about month ago. It stays at hunting camp so I took it to shade tree and he cleaned the carb. It made it back to camp but wasn’t 100%. Now two weeks later. it runs rougher or won’t start and gas is half inch deep in the intake when I pulled carb off and looked down in the hole. That doesn’t seem right. Really floods out and will not crank. I am thinking something has happened when he cleaned it . All throttle and choke cable are proper tension So............I am no mechanic but quick study.......I took carb off and brought home. Any advice. Thanks
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wesk
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PostPosted: Sun Nov 25, 2018 12:15 pm    Post subject: Reply with quote

The float valve is not closing. It may be stuck open, it may have a sinking float that keeps it open or it may just not be sealing at it's seat.
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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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joebuck
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Location: oxford mississippi

PostPosted: Sun Nov 25, 2018 12:34 pm    Post subject: Reply with quote

Thanks Wesk. I will open her up tonigh and investigate . It flloods some kind of awlful. I paid the country mechanic 50 bucks and repossessed it yesterday.... I think he did something to some part the first time he cleaned the carb. I wonder if he put the needle back in?. Oh mercy. This will be fun learning about the carb. Something I should know a little bit about and my teenage sons
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wesk
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PostPosted: Sun Nov 25, 2018 1:06 pm    Post subject: Reply with quote

USE THE BOOK!!!

You have access to free manuals here and the ones you need are the IPL (Parts Manual) ORD 9 SNL G-740, Carter Carb OH Manual (Applicable exerpts from TM 9-1826A dated 52.), your M38 TM 9-8012 and TM 9-1804A. All of these are on our download page in PDF format.
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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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joebuck
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Location: oxford mississippi

PostPosted: Mon Nov 26, 2018 6:35 pm    Post subject: Reply with quote

Oh mercy. Got the downloads and took apart my first carb! I feel like a mechanic now Wesk!
First observations

1. I do not have a Discharge Ball or Discharge Ball Weight? How do I get one?

2. Metering rod spring is missing

I have ordered a rebuild kit from Kaiser
Can I find the discharge ball and weight or similar parts at my local NAPA or advice on making one

Thanks
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wesk
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PostPosted: Tue Nov 27, 2018 12:23 am    Post subject: Reply with quote

Don't waste your money on old military NOS carb kits. There are three kits on the market. If you have the original YS637S carb that the M38 came with.

A dual application kit for both YS637S (M38 & CJV35) and YS950S (M38A1 & M170). sold by Midwest Military & Army Jeep Parts.

A single M38 application sold by Ron Fitzpatrick

a single app Omix-Ada offshore kit

Old NOS Army kits.

Getting a good kit is not a problem but finding individual parts not sold in the kits is.

That small check ball is a very common; Oops it falls out on the floor and overlooked.

Visit my photo album (2nd one) or use the link and go to my M38 Fuel System sub-album and review the data I have there.


Midwest Military & AJP kit.


Ron Fitzpatrick's kit.


Omix-Ada Offshore Kit

Note neither of these kits includes the correct M38 carb base to intake gasket.



Also use care choosing which springs to use for the two vacuum diaphragms.


Accelerator pump diaphragm spring comparison YS637S to YS950S


YS637S vs YS950S metering rods & springs.


Comparison of YS637S metering rod to YS950S metering rod.


A corrected illustration for proper position of YS637S metering rod diaphragm spring.
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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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joebuck
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PostPosted: Tue Nov 27, 2018 9:59 am    Post subject: Reply with quote

Thats beautiful Wesk! Midwest Military is out of Kits so i'll wait on Kaiser and measure everything. Also thanks for info on difuser gasket. i ordered one.
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wesk
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PostPosted: Tue Nov 27, 2018 11:29 am    Post subject: Reply with quote

Did you try AJP? Note that the kit sold by Midwest Military & AJP has the weight & ball included!
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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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joebuck
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PostPosted: Tue Nov 27, 2018 11:39 am    Post subject: Reply with quote

i did not try AJP but Midwest said their 'usual" rebuild kit is back ordered for 8 months and what they stock is one like Kaiser. I had already ordered a Kaiser yesterday and called them this am and they said discharge ball and weight was included. gosh i hope so!
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wesk
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PostPosted: Tue Nov 27, 2018 1:38 pm    Post subject: Reply with quote

I didn't see one in their kit photo!


Kaiser-Willys kit

AJP: https://www.armyjeepparts.com/p-1110-carburetor-kit-master-m38-116882.aspx


AJP kit
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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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joebuck
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PostPosted: Tue Nov 27, 2018 1:52 pm    Post subject: Reply with quote

well i called back.............................and they dont have it.................................... I'll make one.. I got the specs.and will pillage the local hardware store for 1/8" ball bearing and 1/8' round brass billet and cut to lenght to fit 1/8" under top of carb
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Last edited by joebuck on Tue Nov 27, 2018 2:22 pm; edited 2 times in total
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wesk
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PostPosted: Tue Nov 27, 2018 2:18 pm    Post subject: Reply with quote

Which dealer did you call back?
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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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joebuck
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PostPosted: Tue Nov 27, 2018 2:21 pm    Post subject: Reply with quote

i called kaiser back and asked them to check again.....this time he said it was not in there. I then called Daytona Supply and they gave me the specs for the ball and weight. Kudos to Ron there ....very helpful
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wesk
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PostPosted: Tue Nov 27, 2018 2:55 pm    Post subject: Reply with quote

Well, this web site is about helping, sharing and learning so perhaps you & Ron can share the results of your spec's search for the ball & weight? Wink
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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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joebuck
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PostPosted: Tue Nov 27, 2018 3:06 pm    Post subject: Reply with quote

Ron at Daytona Parts Company ( Kaiser steered me to him for discharge ball) knew the Carter YS very well . He said that discharge ball is just a 1/8" ball bearing and the discharge weight needs to be square or round stock bar that cut to lenght will be 1/8" under top of carb. Said he has been in the business for 45 years . An important tip he gave me was that if any of my original brass fiitings or jets were in great shape, use them and not any from these kits that are made overseas.
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