"Bryan, Those harnesses are no
"Bryan, Those harnesses are not too complicated, or at least don't need to be. You could make one up. I do not know what motor you have, but the largest motor of that year was the 50HP V4. It had wires for +12V, Ground, starter solenoid, elec choke, and magneto killer wire. There were wires for an ammeter, but a voltmeter is better and can be run off the +12V wire. The 50HP did not have an overheat wire, but the 35HP twins did, I think. So you need 5 or 6 wires, a SPST switch for ignition and two pushbuttons(choke, start) and a hot light and you have a complete harness. This of course presumes you have the external starter solenoid box, or can make one up."