ASAP Please! Which replacement Stock Carb?

[Ed74]

My stock 2100 recently stopped functioning properly on my daily driver. I currently do not have time to learn and rebuild my carb. I do not know which carb to purchase at Kragen (partsamerica). My two options are:

1. Holley II Remanufactured Carburetor; F-2 (Part #645340); 3 Month Limited warranty; WITHOUT Thermactor emissions; $159.99

2. Holley II Remanufactured Carburetor; F-2 (Part #645065); 3 Month Limited Warranty; With Thermactor emissions; $107.99

I do not have the Thermactor system on my 74 Bronco, but I do not want to purchase the carb without the Thermactor due to a $50.00 price difference. Is there a significant difference between the two? Can I install the carb with the Thermactor and still have it functioning properly? I am open to other options as well. This Saturday is my only day available to swap my carb out.

Thank you,
Ed

 

[broncnaz]

There is usually jetting differances between the carbs could even be some air bleed differances I'd go you the one your supposed to have it will run better with less hassel. But really rebuilding a carb( especailly a stock one) is real easy and will only take about a hour or so to do just get a carb kit and a couple cans of carb cleaner take it apart spray it down with cleaner and reassembly set everything according to the instructions, might need some minor adjustments once you have the engine warmed up but it should be good to go and probably for less than $35.
What happened to your carb they just dont stop working?

 

[Ed74]

Sorry for the delayed response. I think a deposit of some sort was dislodged from my gas tank and stopped up my carb. It is running extremely poorly, but does better at higher RPM's. Any additionally advice will be much appreciated.

Thanks,
Ed

 

[clarrance]

Take it apart and clean it then you will know how for future carb problems, they are really simple to do. And if for some reason you screw it up then go spend the money on a new one. You will be amazed at what you could learn. My moto is try to repair it first, then if you can't go get the experts help.

 

[Doyle]

The 2100 is one of the easiest carbs around to rebuild. Unless its extremely nasty inside and out you should finish in an hour or so. Maybe a little more if really diirty.

 

[grauerfam]

I think a deposit of some sort was dislodged from my gas tank and stopped up my carb.

Have you tried replacing the fuel filter?

 

[Ed74]

Thanks for all the responses! Yeah, I took a closer look at the carb and discovered that one of my jets is gushing fuel out of it. Definitely time for a rebuild. However, since I have never done it before and I need to get my daily driver back on the road ASAP, I will probably purchase the Kragen reman without the Thermactor emissions and be done with it. I will not turn my old one in for a core, so I can rebuild it at my own pace without being without a vehicle.

 

[broncnaz]

Sounds like simple dirt in the needle seats. There's really nothing to rebuilding a 2100 the float and needle seat is the only thing that will come out when the top is removed and thats only if you turn the carb upside down. The accelerator pump diaphram is bascially just a gasket replacement its the small square cover on the front of the carb with 4 screws and the power valve is hidden by the small square cover on the bottom of the car easy to remove old one put in new one and its done. It should take no more than 1 1/2 hours max even if you have never done it before.

 

[Ed74]

Thanks for your help Broncnaz. I actually just returned from a local and reputable Carb shop in San Diego and they performed an excellent job rebuilding my carb. Apparently, I had problems with clogged jets and deteriorated gaskets, which resulted in serious gas leakage and wasting. Wow, what a difference! I have significantly more power and throttle response now that the carb is rebuilt. Normally, I would have no problem researching how to rebuild the carb and then starting the project. However, due to time constraints and the bronco as my only vehicle, I could not afford for something to go wrong with either the rebuild or tuning. Thanks for everyone's input and advice!