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willysmjeeps.com :: View topic - M38a1 carb leaking fuel from top screws
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M38a1 carb leaking fuel from top screws
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RichJohnson
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Joined: Apr 15, 2005
Posts: 162
Location: San Diego CA

PostPosted: Tue Feb 22, 2022 9:33 am    Post subject: Reply with quote

Wow very noticeable how much taller the MM kit needle plunger is compared to the RF kit.
Also the diaphragm springs as well. Very different.

Well from my recent saga its quite clear the needle and plunger in the MM kit are just too tall to allow fuel into the bowl even after flattening the float tab all the way. Thus I returned to the needle and plunger I had existing and adjusted a higher tab than manual spec to achieve proper operation.

Do you have an opinion as to which kit is better for any reason?

I have used the MM kits (which I also understand is the DeBella Army Jeep Parts as well) since they came out and the old blue box china junk before that.
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"Those who enjoy freedom must endeavor to preserve it"

KI6EZA
1954 M38A1 (first civilain owner)
1965 M37B1 Commo shelter truck
MBT
GRC-122 TTY rig
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wesk
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Site Administrator


Joined: Apr 04, 2005
Posts: 16250
Location: Wisconsin

PostPosted: Tue Feb 22, 2022 12:40 pm    Post subject: Reply with quote

Ron F has not been able to re-stock for the YS637S & YS950S carb kits. It appears there are still several kits out there for the YS950S. AJP, Kaiser Willys and of course MWM. I haven't found any kits that are perfect yet. Odd spring sizes and improper gaskets are just a few of the issues.
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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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RichJohnson
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Joined: Apr 15, 2005
Posts: 162
Location: San Diego CA

PostPosted: Wed Feb 23, 2022 12:46 am    Post subject: Reply with quote

Thanks so much for the help.

In the past I have been lucky using the newer kits with my spring and needle pin and a manual spec float setting. But part variance has caught up to me this time.
_________________
"Those who enjoy freedom must endeavor to preserve it"

KI6EZA
1954 M38A1 (first civilain owner)
1965 M37B1 Commo shelter truck
MBT
GRC-122 TTY rig
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View user's profile Send private message Visit poster's website MSN Messenger
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