I have a tach with the following terminals.
Sender - Ign. - Grd. - J/E sender- light.
What does the J/E stand for - I am geussing Johnson/Evinrude, if that is correct what is different internally with this tach? I am putting this on a 12 pole 90 horse Evinrude, how do I hook it up? Do I only use...