33 Ford coupe I'm putting the harness in. Did a search but not finding what I need although I"m starting to wonder if this one uses a sender. Assuming 60's vintage green line tach, 2 unmarked studs, one copper colored the other nickle colored. Wired car with assumption of a gauge power wire and a signal wire but don't really want to experiment and screw up someone elses tach. Any ideas?
Evidently my search skills suck . Found this thread which tells what instructions say in last entry- https://www.jalopyjournal.com/forum/threads/stewart-warner.603557/#post-10608236 And this picture pprather posted in a different thread.
That is my photo. I was able to label the connections from a schematic I found for this tach on a marine forum on the internet. I can only guess that your tach wires the same. Also, it would be a fair guess that mine was made by SW for Chrysler Marine. I've not yet installed mine.
The Jalopy Journal
