by Larry
(Menomonie, Wisconsin)
I have a 1962 16' Starcraft runabout that had a 1963 100hp Mercury 6cyl tower of power. My kids grew up with this boat and we wore that motor out. I have acquired a low hours 1979 115 2 stroke 6cyl tower of power and my grandkids are now growing up with it. Installed it and it runs perfect. The one thing I have not been able to figure out is how to get the two wire tach from the 63' 100hp to work with this 79 115 Merc. Can anyone help me with this? What should the tach wires hook up to with this "Thunderbolt" ignition?