Well I have a 1977 Mark Twain Boat, with a 1982 115 Evinrude, recently new to me. Tach was not hooked up, just a wire that dead ended. I have run a new signal wire from the block on the starboard side of the motor 3rd post to the signal post on the back of the tach (thanks to the info I previously found on iboats!) The tach ground appears to be ok, i tested with test light and it works. The only other thing on the back is the adjustment setting screw....It is now set on #1 from what I can see. Can anyone tell me if this is right or should I just try it and adjust if neccesary? I'm afraid if it's on the wrong setting I may fry it? It is a Meallion tach it made in the USA. The adjustment settings are 1, 2, 3, 4, Anyone tell me which one I need it would be greatly appreciated! Thanks
o position. Ok can I probably made that really confusing. So I'm going to reset to the #4 and reinstall and see what happens. Anyone got any Ideas?????