Home › Forum › Ask A Member › OMC tach 122923 › Re: OMC tach 122923
August 10, 2018 at 9:43 am
#80912
Early seventies should have a rectifier in the charging system, if I remember right. You would hook up the wires as Frank said, hooking the gray wire to one of the yellow wires at the rectifier, preferably the one with a gray tracer. I am going on memory but I believe you’d put the switch on 6. Then the tach should work, providing that the charging system is working to start with.
Long live American manufacturing!