I need a tach for this motor serial-4141159. It has the 3 wire plug-in on the front of the Mercontrol. Do i just need an old Mercury tach that fits this plug, or does it have to be from a 4 cylinder? I see one from a 6 cylinder that has the right plug, but doesn't appear to be switchable for the number of pulses. Any other alternatives besides the older tachs? Obviously, I'm not well versed in tachometers.
Stephen
Stephen