Just received my remanufactured Holley 4180c today. Opened it up and noticed right away that the choke thermostat on the new carb is different than on my old broken carb. I have a 1983 Ford F250 460 with the old style choke stove tube running to the choke and one wire running from the thermostat down to the alternator. The new choke thermostat has one pin style connector on it .. not the blade style that the old one had. It does have the Motorcraft stamp on it though. My questions are ..... is this a different choke setup or simply just a different connection pin? I would love to eliminate the choke stove since its rusted and JB Welded all the h*ll so is this new choke a full electric choke? And if it is a full electric choke how would I go about completing the unplanned conversion from hot air to full electric?

Confused again

 

I can't answer all the questions. But, in my limited experience the Motorcraft units with a bullet-style connection are the 7 volt units, and usually say so. If it is a 7-volt unit it can be connected to the stator connection on the alternator, which gives about 7 volts when running. And, on a 2150 I was able to use that instead of the hot-air part of the choke.

 

The bullet style connection is 7 volts and the power is supplied from the stator on the
alternator. The blade style hookup found on some truck engines is 12 volts. It won't
work with the bullet style.

 

You know, you can always swap your old style choke element onto the new carb...

That said, if the choke wire is connected to the black/white stator connection of the alternator, it -is- getting "7V".

Maybe someone in the past decided that the $100 Motorcraft element was too expensive and they went with the cheaper Holley alternative.

 

Old hickory is right. The 7 volt alternator connection is for Ford electric assist chokes ONLY. Fully electric chokes need to be hooked to 12 volts to work correctly.

The fully electric choke is more convenient, but the thermostatic "hot air" chokes work better because they work in lock step with the actual temperature of the engine.