Tune up cj2a

From behind where the screwdruver us pointing

If its happening after you turn the engine off, rather than while its running it could be your metering rod is out of adjustment. A book I got calls it boil over, basically if the metering rod doesn't seat after you shut it off, gas will get into that high speed circuit and percolate from the engine heat. Then it drips on the throttle shaft it runs out around the throttle shaft. Had it happen a few times, nothing like opening the hood and seeing dripping gas vaporizing on a hot manifold.      

Edited by 48willys - 05 Apr. 2017 at 7:29pm

Your carb is most likely affected by one or more of the usual suspects:

A) incorrect metering rod adjustment
B) incorrect float level
C) needle & seat
D) clogged passageways/worn jet orifices
E) worn throttle shaft

A proper rebuild will reveal the culprit(s).


Edited by danover321 - 06 Apr. 2017 at 1:49am

FYI, you will need a metering rod setting tool and a machinists 64ths ruler to properly complete the rebuild. HF has 64ths rulers for about a buck (if still available).

Also, here is a good resource if you haven't already found it:

http://mightymo.org/Proj_Carter_WO_Rebuild.html




Edited by danover321 - 06 Apr. 2017 at 2:40am

Walcks has them. I'm sure others do too. I bought one, promptly lost it, then decided to send my carb off to Rick at Old Jeep carbs for a rebuild.


http://walcks4wd.shopgate.com/item/3135343634

Link to metering rod tool measurements if you want to try making one, http://www.thecj2apage.com/forums/setting-the-metering-rod-in-a-carter-wo-carb_topic21943_page1.html
Link to rick's video of how to set it, http://oldjeepcarbs.freeforums.net/thread/122/wo-metering-rod

If you got a 134 to 8500rpm and its still one assembly we need to talk. Thats about 3500 rpm over total destruction rpm. If that is what your tach reads I can assure you its not accurate lol.

Removed carb and soaking in mineral spirits after a few runs with seafoam in gas.