M38 Cdn Carb Help

[Peter Phillips]

Originally Posted by rob love

A common problem I run into on the Jeep carbs is that, with todays ethanol poisoned fuel, those two little diaphragms on the front and rear of the carb will crack or puncture and you will not get a good running engine. Usually though, that is more of a flooding situation. I have had better luck with the ethanol resistant kits from places like midwest military, but even better is to stay away from the ethanol fuel as much as possible.

Note there are also conflicting illustrations in the manual on which side the little spring goes on one of those diaphragms. I also go 5/16 on the float level by using a long shanked bolt.

There is some good carb info here: http://www.willysmjeeps.com/v2/modul...wtopic&t=11341

Hi Rob,
I thought about the ethanol attacking old components but figured in the short term this thing should go for the summer at least until I get a newer one ordered....could be wrong here, lol. I'm thinking a newer kit is in the making and I'll definitely try the new float height at 5/16".
I'll look into the WillysM Jeep link, thanks!

As an added conundrum, I took another YS carb and gave it a thorough cleaning and adjusted the float and the jeep runs the same way which I found ironic. Could a fuel pump ever be able to overpressure past a needle and seat?
BTW, great to bump into you again at the Calgary Gun Show