I have a mercruiser marine tachometer from 1969<br />and I need some help wiring it.<br />There is a place for a positive wire in the center of the tach, I would assume it is for a positive wire because the rubber around it is red.<br />To the loser left of it is a hole that you can make an adjustment with a philips screwdriver. What is this for? And where would i connect my distributor. <br />The motor i am using is a chevy inline 6.
