MotorCraft 2100 carb

[Rusted]

I am getting tired of my Carter carb, so I picked up a junk yard MC2100, and last Saturday rebuilt it. The rebuild seemed pretty straight forward, no real tricks that I can think of, and ran into no problem. I feel like it was rebuilt very well.

I installed it today, and the Jeep would not run. After awhile of messing around I was able to get to stay running but it was running EXTREAMLY rich. I am going to have to send the city a bill for the mosquito abatement that I did for them. I turned the mixture screws in all of the way, still is SUPER rich. One item I noticed was that if I fill the float full of gas, it will drain on its own. Is that normal? Isn't the float bowl supposed to hold gas?? It was just draining down through the jets. This is my only clue, I wonder if the jets are just allowing fuel to dump into the carb.

After hours of fussing with it I put on my buddies MC2100 that he pulled and has not rebuilt yet. The Jeep started right up, needs some adjustments, but I can tell that his carb is going to work just fine.

Where to I start to get this carb to lean out? The side is stamped with a 1.08 for the venturi size, is it possible that someone put the wrong venturi in? What ideas do you have?

 

[Hickey]

I have one I will sell ya for $20 bucks.

 

[Rusted]

I have one I will sell ya for $20 bucks.

Put my name on that one. Hopefully I can get this one going, if not that would be great to get another one to try out. Is yours the 1.08 venturi? Is it running good or does it need a rebuild too?

 

[Hickey]

I never tried it. I bought it to use on a 88 YJ I had, then I sold the Jeep.

 

[Rusted]

I never tried it. I bought it to use on a 88 YJ I had, then I sold the Jeep.

Well set it aside for me. Besides I want to see your beadlock jig and some of those beadlock rims in person.

 

[Rusted]

I just pulled the jets and they are stamped with either a 49E or a A9E, I am not sure because the bottom of the letters is cut off. I assume it is a 49 and that means it has #49 jets. Does that jive? Any feedback on what size of jets I should be running for SLC altitude? I am seeing #45 and #47 jets are comming, but with how rich this is I don't think this is only a jet issue.

 

[Milner]

Check the needle/seat. You may need to bend the tab on the float so the the needle closes sooner....I usually seat my float pretty low. I haven't gotten any for a few years, but Ford did stock the jets and they were pretty cheap. Just a little trial and error to get it right....

 

[Hickey]

Maybe your float is cracked/sunk.

 

[Tacoma]

I've got a couple 2150's you can have, if you can use them. That's the carb off the fullsize Cherokee/Wagoneers. Not sure if that'll work for you, but they ran when I scrapped the Jeeps.

Fullsize Jeeps run a lot better without the Ford crap.

 

[Rusted]

Maybe your float is cracked/sunk.

Actually when getting the float set right the first time I was pushing on both the float and the tab side of the carb. Thinking that I may have messed it up by bending both sides I purchases a new float. I will to back to the float and mess with the float levels to see if a less than spec float level will help.