Help ID this Napa Echlin...thing.

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My first thought was like Dan's that it is part of an after-market electric choke. I had one from J.C. Whitney on my Dart slant that looked similar, though I recall only 2 wires. The big hole is so it fits on an exhaust stud. It had some type of thermal material that changed resistance with temperature to control the electric heater in the choke, similar to the later Mopar design (which was smaller).

Could also be an electric fan relay, as many suggest. 4 wires would be right - 2 for the coil and 2 for the contacts.

Final guess, there was a small box called a "load ..." something on F or J bodies that had to do with the alternator. Search for a post on that in the last few months. Dan solved that one. That part is in the 80's wiring diagrams as an optional part, as I recall. I think it had more than 2 wires, so might fit what you have.
 
"field loads relay" is what you are trying to think of.
 
Dan, can you recommend one for a similar electric choke?

slantsixdan said:
It's not a relay. It appears to be a thermal sensor-switch for the heater in an aftermarket electric choke. You'll see one much like it here, but with only one wire. That one wire goes to the choke heater. The big copper mount is also a ground path; as it warms up, the thermal sensor-switch gradually decreases the resistance in the choke heater's ground leg so the heater warms up progressively more and more to relax the choke spring tension and allow the choke plate to open. The simple one-wire variety senses engine temperature via the big copper grounding strap. You mount in a location that heats up at the right pace and to the right degree to operate the choke correctly. Usually this is on or near the manifold.

Yours has more wires and appears to be more intricate than the linked one. Does one of the wires go to the engine coolant temp sender, or does it just look that way because of the angle of the photo?

It also does not appear to be hooked up any more; looks disconnected and abandoned.

I do see an electric choke on your (nonstock) carburetor. Can't see for sure, but it looks as if one of its two terminals has a wire, but the other might not. Without a thermal sensor-switch (either built in or external), an electric choke of this type will not behave properly.
Click to expand...
 
Hit the link I posted previously, given the electric choke kit people a shout and see if they'll sell you just the thermal sensor/ground modulator.
 
slantsixdan said:
Hit the link I posted previously, given the electric choke kit people a shout and see if they'll sell you just the thermal sensor/ground modulator.
Click to expand...

Thanks o wise bearded one.
 
Heck, I thought it was a police head light flasher relay :D :toothy8:
 
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