Hi!
Can anyone please send pictures of Carter YFA carburetor installed on i6 300, so i can see how hoses and pipes run? Without air filter attached would be ideal.
For last few years i have been restoring 84 f150 with i6 300 in it. Now i am putting engine together, but i ran into a problem with carburetor. I did pictures when everything was in one pictures, but i didn't take air filter off, so now i don't know how every hose has to go from cabin side.
I have installed fuelline that comes from mechanicalpump. What is essential and what is not?

 

You should have a diagram on the radiator support correct? Everything is essential on yours unless you do the distributor and carb conversion to get rid of the computer.

 

Where does choke heat tube go is main question for me. can anybody help me with that? Does it go to exhaust manifold? Mine is rusted off, but can i fix it or make it work other way that replacing it with new one?

 

It should go down and attach somehow to the exhaust manifold. There is a vacuum leak inside the round black choke chamber and puts a suction on the chamber. There should be some suction on the line coming out of the choke housing with the engine running(slight not much).

The line runs down and runs against or through the exhaust manifold, and then sometimes runs back up and hooks to a line that goes to the base of the aircleaner horn on the carb so the vacuum leak can suck clean air.

I have never worked on a six so I don't know exactly how it goes, but it should be this same theme. It draws air through the pipe and that air is warmed by the exhaust manifold, and that warm air goes inside the round black choke housing and warms the spring inside which tells the choke to slowly open.

 

Oddly enough I happened to be working with the exhaust manifold on my 300 just a couple of weeks ago, so I may be able to help here. I took a picture of my manifold when it was out of the truck:



This is taken looking down into the top of the exhaust manifold where it bolts to the intake manifold. If you look at the very lower right corner of the photo, you'll see the where the tube that runs to the choke meets the manifold; you can see just the barest fringe of the insulating cover on this tube as it leaves the photo. You can't see it in the picture, but the clean air feed that Franklin mentioned fits into a hole in the same section of the manifold, just down (down meaning in the direction of the roadway when the manifold is mounted to the engine) from where the choke tube goes in.

Hope this helps.

 

Here are some photos that might help. I have heard of people making new air lines out of brake lines. My truck has a feedback Carb, so the air line is on the right side of the Carb choke housing.
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The connect point is the round thing on the bottom of the manifold, this is air IN to the manifold. The fresh air conect point to the Carb in the red line.
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Jim