Posted: Mon Dec 26, 2022 7:18 pm Post subject: M38 Carter YS 637S Carb question
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?
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.
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