I have a 1976 Sea Ray which I have owned since 1978. She has Ford 351w with a Mercruiser outdrive. The problem I'm having is that while in crank position she starts right up as soon as I put ignition switch in run position she dies. Prior to this issue I was winterizing her. I ran the engine to warm it up. Then proceeded to winterization. I replaced plugs, cap and rotor, oil and filter and did a compression check. Distributor is a Flamethrower with Petronics ignition. Went to start it and she fired right up as usual but upon going from crank to run she dies. So hmmm she is 41 yes old so I replaced ignition switch still no run. Then I replaced the starter solenoid, still same issue. Then I disconnected the shift interrupter circuit, still same issue. Any suggestions would be greatly appreciated.