carb identification

[1986bronco2]

ok as some of you may remember a couple weeks ago i purchased a 79 f-250. well im happy to say that sofar no major issues as of yet and it runs and drives great. gotta love that big 6 under the hood but i do have a question regarding the carb on it. when i brought it home i looked it over again and noticed that the carb was all nasty and dirty looking. (no air cleaner present) so i started it up and let it run for a few and and it ran fine. so to clean the carb i decided to take a can of carb cleaner and spray the thing down(inside only) and noticed that some of the cleaner was leaking at about the middle of the carb. so i shut the truck down and let it evaporate and restarted it. i grabbed the throttle linkage and "goosed" the engine and i saw a little bit of gas leak out of the same area. so im currently looking into just replacing the whole carb instead of doing a rebuild. im not good with small parts lol. i know i have a carter single bbl yf carb on my truck but im clueless as to wether or not i have an electric choke or a hot air choke etc. i dont see any wires coming off of the carb and on the back of it there is what appears to be a steel line(brake line) that threads to into the carb but its only about 4" long and the rest is missing(rusted off by the look of it) the difference in the carbs is minimal except the choke operation and about a hundred bucks in the price so what should i look for so that i know what to tell the person at the parts store what i need when i purchase a new one. sorry about the length of this but i try to be as in depth as possible when it comes to cars so that everyone has the best description possible. thanks again for your help,bill

 

[Mark_88]

Howdy Bill,

Pics would help immensely in this case showing the carb with the breather off. Someone might know that this model only came with certain carbs and could identify it without seeing it, but most of us have never even seen under the hood of a truck of that vintage.

The other thing you will need is the tag on the carb itself. They usually have a small metal tag with numbers and letters stamped on them. The auto parts people need that number to even begin ordering rebuild or replacement carbs.

Now there is an on-line reference manual available to us that you can punch in the year, make, and model but you will also need the engine size. Probably only one version of 6 cylinder for that era (in-line straight 6) so that shouldn't be too hard to determine.

The on-line reference can be found on TRS here ... http://www.therangerstation.com/forums/showthread.php?t=319

Just follow the screens and you will probably find more information than you will ever want or need to know...


EDIT: Sorry, I just went looking under the 79 F250 and it appears there was only a 4.9 straight six option for that model, but two carbs...one was the Motorcraft 2150 and the other was the Holley 4180-C...since the Holley was listed as a 4 bbl, yours must be the Motorcraft...but I thought that was a 2 bbl...

Anyway, the tag is needed for sure...once you have that you can at least order parts if needed.

 

[superds]

I like this website to look up carbs: http://www.showmetheparts.com/autoline/

According to them the 79 F250 used a Carter C1-YFA carb, one barrel.

As far as electric vs. hot air chokes, I prefer the electric, to me it seems easier, just hook up switched power to it. No messing around with tubes. You would be able to put an electric choke on there even if it originally came with a hot air choke.

 

[Mark_88]

Wow, that was way better...only took a few seconds and they actually have pics!!!

Repped~thanks!

 

[superds]

Thanks for the rep!

I stumbled upon that website when I was looking for a new carb for my 84 BII for the duraspark conversion and trying to find the ideal 2150 to attempt to order. I wish more of these auto parts suppliers would just publish pdf of parts counter books online instead of making you search based on options. I want to see all the options at once for all models on one screen so I can use my eyes/brain to filter out what I want, not some search terms!

 

[Mark_88]

Yeah, I know what you mean...but that is probably one of the best sites I have ever seen for carbs...too bad more where not like that or, as you say, give you more options...

I found my own carb on there and saw something right away that I may be missing on mine...and may be affecting the performance of my truck...but now I have to go out and double check it just to see if that part fell off or I managed to leave it off during my rebuild...only a minor part like a spring that helps the secondary open...lol

And it also solved an age old mystery about what I thought was a missing part but is actually a non-existent part...probably for something that they never got around to implemtenting...but I always wondered what went on that part of the carb...now I know I'm not actually missing anything...

 

[kimcrwbr1]

That choke heater tube that is terminated is possibly a direct vacuum leak. If your going with an electric choke find a way to cap off that fitting to keep the choke assy from sucking air?

 

[1986bronco2]

as always i greatly appreciate the tips,advice,and overall know how that everyone here has i tried to create an acct on fte.com and had nothing but a headache every time i tried it kept sayin my user name was already in use so after more than 10 attempts i said forget it and just posted my question here and even though my truck is 34yrs old and nothing like a ranger or b2 the general knowlage you have here is excellent to to all of you, you have my highest remarks and up most respect and if anyone ever asks me if i know where to find info about their rangers,b2s,etc they will certainly be referred here. thanks again,bill

 

[85_Ranger4x4]

Can you post pics of what is leaking?

If it runs good and is just leaking you could just need a gasket. You might have to get a carb kit to get it but a carb kit is far cheaper than a new/rebuilt carb.

I know for carbureted tractors you can get just the gasket kit for about 5 bucks, carb kits run $20-$40 depending on what they are for.

IMO they are pretty fun to rebuild.

 

[tmcalavy]

Ah...the Motorcraft/Autolite 2150 and Carter YF/YFA one barrels...more fun that a cup of poo ready for tossin.' A 79 ford motor, 300 or 240 I-6, should have the electric choke unless someone dropped an older carb on there. The heat-sink carbs were the worst of three incarnations...manual/cable choke, heat sink, and electric. If you want years/decades of trouble-free operation...get a rebuild kit for about $18, can of carb cleaner, and a manual choke kit. Might take you a Saturday morning to rebuild/clean the carb and install the manual choke. If you don't like working with small parts, visit the old garages until you find a guy with more fingers than teeth...probably about my age and infinitely qualified to rebuild carbs. Good luck. Once it's done you should be able to get 15 mpg reliably in all circumstances with a healthy I-6...day-in, day-out...and maybe 18 down the road with a tail-wind, etc. Had six Fords with those engines before I caved and went to their midget cousin (Ranger) for gas savings.