I'm working on this motor. Owner brough it home and it had spark , he decided to let his dad re-wire it. I had a look at a wiring diagram online and it corresponded to the keyswitch colour codes which tells me its a 65. His dad ran it the same as the PO had it wired and they said it melted a wire going to under the powerhead when they tried to start it. There are 2 wires, assuming they are the ground wires to the points. I'm used to working on OMC's, are these Merc's any different. Something tells me putting power to these wires fried components under the magneto. Any advice welcome.
Signature- If you have fuel and spark- Have you checked compression?