Is this a Carter YFA?
Thread Starter
|
Tuned
Joined: May 2009
Posts: 300
Likes: 5
From: Apex, NC
Is this a Carter YFA?
This came off of an '80 F150 300 w/ Duraspark II. It has stamping of 7287S and a casting to the right of the fuel inlet of 2433. What is the purpose of the linkage on opposite side of the choke? It moves with the throttle shaft and has some sort of dashpot on this side also. Can anyone ID this thing for me? What does this forked arm actuate?
Thread Starter
|
Tuned
Joined: May 2009
Posts: 300
Likes: 5
From: Apex, NC
Thanks, I know it's a Carter (see photo below), what I don't know is which one. All of the drawings and pics that I find on-line never show the forked arm on the opposite side of the throttle shaft. I'm trying to figure out what it does and when I go to look for a rebuild kit, making sure I have the new parts for this assembly. Again, the only rebuild kits I find don't specify for use on this model # 7287S
Elder User
Joined: Nov 2004
Posts: 666
Likes: 5
The carburetor pictured is a Carter YF. IIRC, the YFA is the feedback carb. It has been a while since I had my YF open, but I believe the forked linkage on the front opens the bowl vent (I don't recall if it opens it at idle, or opens it as you come off idle). The reason you don't see it in pictures and diagrams very often is that it was only used near the end of the YF production on emissions controlled applications. Most of the information I have found online is for the older YF carbs. The bowl vent was connected to the charcoal canister. In your second picture, there is a hole to the right of the fork linkage. There is supposed to be a short tube pressed in there. That is where the vent hose connects.
Elder User
Joined: Apr 2009
Posts: 922
Likes: 1
From: San Diego
In my humle opinion, it is actually a YFA, as the previous poster noted there were two versions of the YFA, Feedback and non-feedback.
In what I have found, the YF did not have the fuel bowl vent (which is missing the tube in the op post)
If you go to Oreillies (However the hell you spell it) they should have a kit for it, ask for what ever model year you pulled it off of rebuild kit for the inline 6 carb. (However nothing beats having the carb id tag) It should get you in the ball park for the right kit, the instructions for the kit are outside of the parts box so you can verify that it will work for your carb, once you open the kit there is no returning it.
There will be more parts in the kit than you need, and will say YF or YFA in the instructions.
And I succesfully rebuilt a YF carb with a YFA kit for what it is worth by just following the instuctions to the letter with the parts in the kit I could use.
In what I have found, the YF did not have the fuel bowl vent (which is missing the tube in the op post)
If you go to Oreillies (However the hell you spell it) they should have a kit for it, ask for what ever model year you pulled it off of rebuild kit for the inline 6 carb. (However nothing beats having the carb id tag) It should get you in the ball park for the right kit, the instructions for the kit are outside of the parts box so you can verify that it will work for your carb, once you open the kit there is no returning it.
There will be more parts in the kit than you need, and will say YF or YFA in the instructions.
And I succesfully rebuilt a YF carb with a YFA kit for what it is worth by just following the instuctions to the letter with the parts in the kit I could use.
Trending Topics
Elder User
Joined: Nov 2004
Posts: 666
Likes: 5
6fifty_f1fifty: You are correct, it is a YFA. My mistake. I did not realize that there were feedback and non-feedback versions of the YFA. To the OP, you mentioned diagrams not showing the fork linkage on the end. I found the following which shows diagrams for the YF and both FB and non-FB versions of the YFA. It is a pdf document. Scroll down to page 25 for the start of the YF/YFA section. http://www.walkerproducts.com/_pdf/carter1barrel.pdf
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Post Fiend
Joined: Jul 2004
Posts: 8,786
Likes: 28
From: Northern California
It depends on which parts manual you read from to if its a YF or a YFA or not.
I have several and even they don't agree. The only way to really tell is with the carb tag number.
My Ford book has a blowup of what it calls the YF carb, and some versions of the YF have a fuel bowl vent. Ford has been known to get it wrong, but I'd rather trust them in certain situations. Other variations are electrically assisted chokes according to walkers PDF are for YFA only, and just plain thermostatic for the YF. But Ford contradicts this as well as they could be on both according to them. So who do you believe? My Haynes manual concures with the Ford one.
One thing is for sure though, All Feedback Carter Carbs are YFAs. And not all variations are shown in the blowup diagrams in the walker PDF either.
One good thing though, most carb rebuild kits are both YF and YFA compatible, so you shouldn't have any worries there, as long as you have the original carb ID number.
I have several and even they don't agree. The only way to really tell is with the carb tag number.
My Ford book has a blowup of what it calls the YF carb, and some versions of the YF have a fuel bowl vent. Ford has been known to get it wrong, but I'd rather trust them in certain situations. Other variations are electrically assisted chokes according to walkers PDF are for YFA only, and just plain thermostatic for the YF. But Ford contradicts this as well as they could be on both according to them. So who do you believe? My Haynes manual concures with the Ford one.
One thing is for sure though, All Feedback Carter Carbs are YFAs. And not all variations are shown in the blowup diagrams in the walker PDF either.
One good thing though, most carb rebuild kits are both YF and YFA compatible, so you shouldn't have any worries there, as long as you have the original carb ID number.
Thread Starter
|
Tuned
Joined: May 2009
Posts: 300
Likes: 5
From: Apex, NC
Thanks to all for some excellent knowledge, as usual !!
Just to throw some more confusion into what comes with what, this carb has a manual choke housing. It looks OEM as the cable was mounted to the same bracket as the throttle cable.
Does anyone know where I get vacuum from for the dashpot on the bowl vent linkage?
Ported or manifold?
Just to throw some more confusion into what comes with what, this carb has a manual choke housing. It looks OEM as the cable was mounted to the same bracket as the throttle cable.
Does anyone know where I get vacuum from for the dashpot on the bowl vent linkage?
Ported or manifold?
Post Fiend
Joined: Jul 2004
Posts: 8,786
Likes: 28
From: Northern California
The Carb was converted to manual choke. It originally had at least a thermostatic choke on it before, as evidenced with the ports visible on the carb. If you keep it manual, then these will not be used or needed.
The linkage on your first picture is for the fast idle cam. With the choke closed it raises the idle speed of the engine about 500 to 1000 rpm.
The thing pictured in your second picture is not a dashpot. (I believe this is what you are asking about.) It is a vacuum switch for Wide Open Throttle. On this paticular carb, it's most likely used in conjunction with the EGR Valve. (although there can be other uses) This Wide open throttle switch is "Tee'd" into the line that goes from the carb to the egr valve. In wide open throttle position, the vacuum for the EGR is bled to atmosphere making the EGR valve close during wide open throttle conditions.
The linkage on your first picture is for the fast idle cam. With the choke closed it raises the idle speed of the engine about 500 to 1000 rpm.
The thing pictured in your second picture is not a dashpot. (I believe this is what you are asking about.) It is a vacuum switch for Wide Open Throttle. On this paticular carb, it's most likely used in conjunction with the EGR Valve. (although there can be other uses) This Wide open throttle switch is "Tee'd" into the line that goes from the carb to the egr valve. In wide open throttle position, the vacuum for the EGR is bled to atmosphere making the EGR valve close during wide open throttle conditions.
Elder User
Joined: Apr 2009
Posts: 922
Likes: 1
From: San Diego
F100Jim: It's all good. I said in my opinon because that was all it was based off of information that I had gleaned from various manuals and such. I am no expert in any of this stuff I just ride the wave of info everyone shares here. I could have been talking out of my a$$ for all I know, so i did not want to step on your toes either...
Come to think of it, I bought both kits (YF and YFA ) from Shucks Auto (before they sold out) and I think I ended up using parts from both kits which is ok because they were like 12 bucks each, unlike the two barrel kits which run 40-60 bones
Come to think of it, I bought both kits (YF and YFA ) from Shucks Auto (before they sold out) and I think I ended up using parts from both kits which is ok because they were like 12 bucks each, unlike the two barrel kits which run 40-60 bones
Last edited by 6fifty_f1fifty; Nov 30, 2010 at 04:18 PM. Reason: dang spell check
Thread
Thread Starter
Forum
Replies
Last Post
DieselCamper
1973 - 1979 F-100 & Larger F-Series Trucks
8
Jan 27, 2017 11:21 AM
Nathan's Truck
1948 - 1956 F1, F100 & Larger F-Series Trucks
14
Oct 20, 2015 09:56 PM
