M38 Carter YS 637S Carb question

JeepdaddyRC · Post by **JeepdaddyRC** » Mon Dec 26, 2022 7:18 pm

Rebuilding my first YS637S carb.
The drawing (chapter 9, fig 57, p. 110) shows the bottom orifice of the low-speed jet tube inside the bleeder tube (from the air horn) is open at the bottom. Is that correct?
Mine has no opening.
Is it plugged?
Or am I misinterpreting the drawing?

JeepdaddyRC · Post by **JeepdaddyRC** » Mon Dec 26, 2022 7:28 pm

Here is the drawing for reference

Post by **wesk** » Tue Dec 27, 2022 4:50 pm

Here's the illustration showing the hole in the end of the tube!

You can view the large size of this photo at: http://willysmjeeps.com/v2/modules/gall ... om_001.jpg

JeepdaddyRC · Post by **JeepdaddyRC** » Thu Dec 29, 2022 10:22 am

Thank you Wes.
I found a rebuild kit from MWM that included a new low speed jet tube.
Numerous issues found inside the carb including:
Low speed jet tube plugged.
No weight or check ball.
Metering rod pin missing and metering rod bent.