Carb Help

Maybe you all can help. I have a '74 w/258 I6 and a single bbl carb (i think it is the original ). Jeep started and drove fine when i went to get gas. When i was done i started up and backed up so i could get around the car in front of me. When i started to drive forward she started sputtering and died just as i cleared the fuel pump overhang. Tried to restart but it would turn over and not catch. My first thought was vapor lock (even though i have not researched the topic). When i popped the hood, i noticed some seepage from the bottom of the carb and the top of the spacer. I popped the air cleaner and noticed that the barrel was half full with gas. After letting her sit a while, i was able to get her started for a second, but she would sputter and die. It seemed like it was flooding. I immediately saw the seepage from the bottom of the carb and the barrel was half full again. My buddy says i may have a stuck float. If anybody can give some things to check and help diagnose i would appreciate it. Right now i'm thinking rebuild, but maybe you all can give suggestions on that as well. Thanks

 

Sounds like a stuck needle/sunk float.

Pop the top off the carb and look for rust or dirt in the bowl and make sure that the inlet needle is free in its bore and not hanging open.

If you can get ahold of a new float, go ahead and throw that in as its cheap insurance. If the original is brass and you can hear gas sloshing in it, its toast. The plastic floats can absorb gas and be no good(sunk) but you can't tell readily.

 

are you running the Mech fuel pump or a aftermarket electric one?

 

I have a mechanical pump. I also discovered there is no fuel filter anywhere. not between the tank and the pump, or between the pump and the carb. At a minimum i'm lookin at a rebuild, something i have never done. Assuming i have the original carter single bbl, is this a difficult task? Are the kits readily available? would i be better off putting a new/different carb on. I realize i need to do some research on what type of carb I have, but i look forward to your responses. Thanks

 

Can you post pictures of your setup? (with the air cleaner off).

The stock Carter YF 1 BBL has served faithfully for 30+ years. Might as well rebuild it as parts are still available and CHEAP.

We really need to see what the previous owners have mickey moused for you , though.

 

well, it turns out i dont have the carter YF. I have a holly single barrel. Only info i have right now is a model that says 1940. There is no tag, but various casting #'s. I just got it off and took it to autozone. The guy there was no help. i am going to take some pics and post them and try and find it on the web. anybody know the most common holly's people would use? i appreciate all the help.

 

Yes, not the original carburetor. A common carburetor though.

http://www.google.com/#hl=en&source...GywSzzvH-CQAAAKoEBU_QWLB6&fp=d1f071870171591f

The IHC Scout used the AMC 258 engine for some years, and that engine was equipped with the Holley 1940.

Lots of info on the net. If you can find an old-time parts store with knowledgeable counter people, they might be able to help you. The Scout application might be a good place to start.

<edit> From the link above, I found this page - http://www.carburetor.ca/carbs/tech/Holley/1900-index.html - Google is your friend.

 

Have you driven this jeep much? Is this your first fill-up? Has it been sitting for a long time? History history history is always a big help. You may have to clean the tank, blow the lines out (disconnected from pump and carb) and I would install two filters. One before the pump and one after the pump. I suspect that spraying fuel in the tank has stirred up junk that lodged under the needle and seat causing carb overflow.

 

To elaborate on Walt's comments -

If it were mine, I'd buy a can of spray carburetor cleaner and carefully take the carb apart, clean everything and blast out the passages with compressed air, and put it back together with the old gaskets. I'd then add the fuel filters that Walt recommends.

If you don't feel up to taking the carburetor apart, you could instead take the bowl cover off, and spray out the bowl, needle and seat with the spray carb cleaner. Note that this carb may have a fuel filter that screws into the side of the carb somehow. If so, you can remove it and blast it with the carb cleaner too.

Looks like this carb has a detachable float bowl - if you take it off, it may leak if you put it back with the old gaskets. You pretty much have to take that chance if you don't have the carb kit. Be careful with disassembly and you may be able to save the gasket.

<edit> Note the 1904 - 1958 Ford manual in a link I posted above, should be pretty close to the 1940 carb. They are the same basic design according to that page.

 

thanks guys. To answer some questions: This is my commuter. I drive it about 15 miles (round trip) from home to work and back. I also do some driving around base with it. About 2 weeks ago i took it on the highway for the first time. Probably hit 55, but my speedo's not working right so i dont know. The day this happened, i had already driven it about 8 miles by the time i put in gas. It started right up afterwards and backed up just fine. When i started to go forward thats when she died. I replaced the fuel line from the tank to the fuel pump a few months ago, but i never replaced the line from the pump to the carb. I guess it didnt register that there needed to be a filter somewhere along the way. Since my previous post i have done some research and found info on the Holly 1940. You all responded so quick that i havent found the rebuild kit info yet. I have noticed that i am missing some parts off my carb according to the diagram i found. I will continue to search, but now i know that the 1940 was common on scouts as well as ford(from what i have found out so far). I appreciate all the help so far.

 

well, after some disassembly for cleaning, i discovered that the pump piston cup was ripped half off. Gotta make some phone calls and make sure that part comes with the rebuild kit. Not counting the expense of buying a new unit, would there be pros/cons to switching to another carb? Thanks for all the advice and info.