Choke Issue

[Walter R.]

I put recently purchased 3247 carb on engine. Carb taken off had electric choke. I purchased choke kit from Long Island and installed. When engine cold the choke was opened. I read service manual and adjustment is make by bending choke rod. I bent rod as straight as possible and choke not close to closing. After specking with carb supplier I purchased another choke coil and rod from different supplier. Different choke same result. The carb gasket is standard thicknesss so there should be no problem with height. Help

[Clem Z.]

Re: Choke Issue

I put recently purchased 3247 carb on engine. Carb taken off had electric choke. I purchased choke kit from Long Island and installed. When engine cold the choke was opened. I read service manual and adjustment is make by bending choke rod. I bent rod as straight as possible and choke not close to closing. After specking with carb supplier I purchased another choke coil and rod from different supplier. Different choke same result. The carb gasket is standard thicknesss so there should be no problem with height. Help

if i remember correctly there are 2 different divorce choke styles one pushes the choke closed and one pull it closed.do you have the correct one ???

[Walter R.]

Re: Choke Issue

Yes, the choke coil pulls down on the choke rod which opens the choke plate. When engine is cold the coil spring is in position that has choke open. The end of the coil (Where you attach choke rod) is almost to the bottom of the coil or at about the 4 o'clock position, I hope this makes sense, which puts no upward pressure on choke rod to close choke plate. It would have to be around 1 o'clock position to close plate. There would be a significant amount of coil travel to close the plate.

[Clem Z.]

Re: Choke Issue

Yes, the choke coil pulls down on the choke rod which opens the choke plate. When engine is cold the coil spring is in position that has choke open. The end of the coil (Where you attach choke rod) is almost to the bottom of the coil or at about the 4 o'clock position, I hope this makes sense, which puts no upward pressure on choke rod to close choke plate. It would have to be around 1 o'clock position to close plate. There would be a significant amount of coil travel to close the plate.

maybe the coil was put on backwards. can you remove it and reverse it ?? i have had to do this with choke on the carb

[Walter R.]

Re: Choke Issue

I thought something like that could be my problem. I ordered another coil spring and rod from another supplier with same results.

[Paul J.]

Re: Choke Issue

Yes, the choke coil pulls down on the choke rod which opens the choke plate. When engine is cold the coil spring is in position that has choke open. The end of the coil (Where you attach choke rod) is almost to the bottom of the coil or at about the 4 o'clock position, I hope this makes sense, which puts no upward pressure on choke rod to close choke plate. It would have to be around 1 o'clock position to close plate. There would be a significant amount of coil travel to close the plate.

A picture would help a lot.

[John H.]

Re: Choke Issue

Walter -

Assuming this is a '66 L-72, do you have the stock casting #3885069 intake manifold?

[Walter R.]

Re: Choke Issue

Yes, it is the original intake and I will post a picture tomorrow.

[John D.]

Re: Choke Issue

Walter, Once in a while Clem hits on something. He is the carb guru in my/our area.
A new customer complainted that his 65 FI choke wouldn't work for crap. Problem is that someone put the bimetallic choke spring on backwards. I reversed the spring and it worked like it was supposed to. John

[Walter R.]

Re: Choke Issue

Attached are pictures.P1012378.jpgP1012379.jpg

[Russ S.]

Re: Choke Issue

I put recently purchased 3247 carb on engine. Carb taken off had electric choke. I purchased choke kit from Long Island and installed. When engine cold the choke was opened. I read service manual and adjustment is make by bending choke rod. I bent rod as straight as possible and choke not close to closing. After specking with carb supplier I purchased another choke coil and rod from different supplier. Different choke same result. The carb gasket is standard thicknesss so there should be no problem with height. Help

Walter, Which way does the coil spring go when you bring the engine up to temperature? Finding that out should tell you whether or not the coil is correct.

[Timothy B.]

Re: Choke Issue

Walter,

Me thinks your choke coil is upside down. With out looking at my 67, the coil when cold is down and after warming the coil expands upward to open the choke.

If the lever on the carburetor (where the choke rod attaches) pulls down to open the choke then there is no way the coil can pull down also when cold, something is ass backwards and it seems to me like the coil.

[Clem Z.]

Re: Choke Issue

i always check the direction the choke coil moves by dropping the whole unit in very hot water

[Walter R.]

Re: Choke Issue

The coil pulls down when heated which is the correct direction to open the choke. It opens the choke fine but does not close the choke at ambient temp, which is pretty warm in Virginia. The pictures show the choke at ambient temperture and you can see the choke plate is opened.

[Dave B.]

Re: Choke Issue

Walter,

This is kind of a stretch, but in the photo it looks like the link from the vacuum unit is resting against the top of the slot in the choke linkage. If it were totally free, I would think it would drop and rest on the bottom of the slot. Is it possible this link is binding the linkage and preventing the choke from opening?

Dave Brown