Actually, I got the solenoid from Amazon. It's aftermarket, but it's supposed to be a replacement for the original part number. So what about the "I" terminal? Just leave it unconnected or should it go to ground?
Also, since the Hitachi solenoid was just wire-tied to something, I have no idea...
I have a Mercury 650 Thunderbolt 4-cylinder. The serial number (2504342) tells me that it was made early in 1969.
The wiring in the motor has been jacked up by at least two different "mechanics" over the years. Instead of replacing the crumbling wiring harness, they just drilled holes in the...