Carter YF Carb Issue - 59 CJ5

Last summer I had the 134 rebuilt in my 59 CJ5. I worked most of the bugs out (not just with the engine, the Jeep had been sitting for 10 + years) over the winter and summer and just got the chance to test it off road last week. It basically ran fine on flat ground, but once I put it on a rough road, it developed a leak in the carb. It looked like it was leaking from the fuel bowl down the shaft the accelerator rod rides up and down in. I checked the float level and it was actually low. (Manual says 5/16" and I was about 1/2".)

When I took it apart, it looked like the gasket or seal that goes around the accelerator pump rod was worn. I had a carb kit with me so I replaced that seal, along with the rest of the parts that come in a carb kit. I also lowered the float just a little. This largely solved the problem. No drops of gas leaking out the bottom, but it did stay a bit damp below the pump rod.

I'm guessing that the seal does not do a complete job of sealing off the pump rod shaft and on a bumpy road the fuel in the fuel chamber splashes into the rod shaft. Sound right? Is there anything else I can do about it besides carrying a fire extinguisher?

 

Do a search here on the YF. The leak is likely due to the float needle seat aperture being twenty thousandths too large. All generic rebuild kits will have this larger seat. Look for The Carb Shop in the search posts; he has the correct kit, but it is pricey. I bought one and still didn't quite get it stopped, but I scored a Solex and used that.

Option 2 is a Solex replacement, but not the one from JC Whitney.

 

I have had the same problem with my YF. I got a rebuild kit a couple of years ago from NAPA had the rubber seal but it seemed to fit wrong or was to tight and moved with the rod. As I was putting it on I said to myself, self this doesn't look right or fit right but I used it anyways and still leaked a little. This year it is leaking really bad and am replacing mine with a Solex should be here today, I will take pics of the install so we can all see how things go together.

 

Sparky, the way I understood the Whitney/Solex issue was that the body was a little taller than either the YF or the "correct" Solex. That caused interference probs for the the oil bath air horn. No personal experience, just what I learned from somebody here, IIRC.

 

Nope, not sure, prolly just another bad memory chip in the headbone.

 

I got one of the JCW carbs. It was supposedly the right one for the 134 (not the L head). Problem with the one I got was the linkage you hook things up to. Mine was all wrong. Got one from Willys Works and that one worked fine.

Stan

 

I just recently rebuilt my YF and noticed the gasket was tight. I was thinking about a trick I heard of, A piece of loose cell sponge cut to the right shape should eliminate any sloshing.