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Our daughter and I are fixing up a 1969 F100 with a 240. It was a runner when we bought it, but we parked it to do some work (tune up, new front end grommets, shocks, etc.). Now that we thought it was drivable, we've discovered that the throttle will stick open (fortunately, its a manual). Upon investigation, the butterfly at the bottom is loose side-to-side and apparently gets sucked to one side and stuck. We can see the metal arm that connects to the back side of the butterfly rod bending when it sticks.
The carb has been rebuilt. We also cleaned up the manifold with Simple Green and water.
It is a Carter YF-4670S. Vacuum advance.
I had posted this on another forum and have learned that these carbs are hard to find. I found one in 700 miles away, as-is and more than I want to pay. One of the users of that forum directed me to this one, given the focus on 6-cylinders.
Open for suggestions...sounds like one option is to upgrade the distributor. If we do that, I want to make sure we understand what else I will need to do and what my carb choices are at that point.
By the sound of what you describe on the carburetor, the bushings on the base plate itself are worn. Unless you take it to a high end repair shop, 99% of the time this is not addressed in a carb rebuild, as it's physical wear on the carb itself and not something simple like gaskets.
It's possible to remove the throttle blade and pull the throttle arm out, drill out, and rebush/resleeve the base plate, and put it back together, but it takes some know-how.
Do you know which carburetor it is? I'm not familiar with the 240s, particularly that old, but I thought they had an Autolite 1100. Is that the case?
The carb is a Carter 4670S. I have been unable to find one online. I found a used one 700 miles away, as-is. Too risky. Apparently, they are very hard to find.
$99 would be cheaper than a new carb...if I can find a place (haven't looked yet).
I'm starting to lean toward a distributor upgrade and a different carb, but no idea what that will entail.
We want to stay stock mostly from a cost control expensive. Our daughter is paying for this and has spent much more than she intended already.
I found a guy that says he can fix the bushings on the butterfly. If that works, we'll go that direction. Would like more performance in the future, but that's a year or two out.
i have a real USA carter and a china copy almost new. both work good, but decided to stay with the original autolite that came stock on the 67 for the manual choke. if you dont get yours fixed, you may want to consider one of these. wanting $50.00 for either one. just a thought.
Hi fluff,
'65 F100 Pete here, I have a Carter carb on my 240. Not sure of the #. My truck is in the shop. It is due to be finished on Friday 11/19. I'll look and see what the # is when I get it back. I am interested in buying your carb if you still have it. I'll tell you the # when I get it back. I'll gladly pay the shipping cost. It is a manual choke model. I take it yours is too?
All the best, Pete
PS, I have just looked at a pic of my carb ... the #...62453, hmm...I could have my wife send you the pic I am refering to. It'll be a little later tonight, Pete
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