carburetion problems

[ranchhopper]

I got my 3A running this week it has a carter YF carburetor the jeep starts good I dont even need to choke it but anything past 1/3 throttle it starts to stumble. The jeep runs like when the vacuum line comes off a newer vacuum advance distributor the way it stumbles and wont accelerate past that point. I have never had an older jeep so Im at a stand still until I can figure out what the problem is I know it has the wrong intake manifold on it from a later model jeep one other strange thing when it runs there is a lot of condensation on the riser under the carb it just drips water off of it after running a few minutes any help or suggestions would be appreciated.

[garage gnome]

Sounds like the high speed jet is plugged up on it. You'll have to get a carb kit and rebuild it or send it out someplace if you don't feel comfortable doing it yourself. A member here, scoutpilot, rebuilds WOs. I don't know if he does YFs. These carbs are very easy to rebuild (I think).

BTW, why is the there a hit and miss engine primer cup on your intake? (the brass thing on the right)

[ranchhopper]

I will have someone rebuild it for me thanks for the help I have no idea why thats on there it was there when I bought it.

[garage gnome]

The primer cup appears to be open. Have you tried closing it? You said it sounded like a vacuum leak and that could cause it!  

[ranchhopper]

I will try it but its full of dirt it doesnt look like it could let anything through.