Four winns quit coming in. After further investigation the distributor rotor melted and made the inside of cap like a powder film. So I changed cap and rotor and boat tries to start for about one second and quits.Checked spark and it looks good. checked fuel pressure and filter at carb and all is good. Not sure what would cause this and why it won't run now. HELP!!! I converted the points to a pertronix ignition with a flame thrower 2 coil. It's ran fine for about a year til now. Talked to a marine mechanic and he thought to check the grounding of the distributor. Any other suggestions would be greatly appreciated.