Re: wiring trim - 3 wire on a 50hp johnson
What I did, instead of trying to track down the harness for a 30yo outboard, I went to the local auto parts store and picked up a couple $6 Ford style fender mount starter solenoides (one for yup, one for down).The 3 wires on the trim are green, blue black. I hooked the black to ground, green to one solenoid, and blue to the other. Supplied 12 volts to the other post,and set up 2 momentary switches on the dash to fire the solenoids. Works like a champ.
I could draw it out if that would help. Cost less than $20.