ok, more then just swap 2 wires
A breaker is like a switch, can connect either wire on any side. Swapping wires is nothing and has no effect on anything. Moving other things you mentioned is probably what fixed the issue
Welcome
Water in oil doesn't mean the motor is ruined, unless the motor was left running until it locked up. Change oil a few times and get it running for a while. As the motor warms up it will start burning off the water that remains
Going to need some clarification
Start motor and prop spins, but stops spinning when placed in neutral?
That's what should happen, but it should not be able to be started in-gear
Should be very little noise from drive, check the gimbal bearing for smoothness. It should be silky smooth to...
No issue with wiring
The reason for disconnecting the ALT wires was to see if there was a problem with the ALT which was back feeding the ignition. Doesn't appear that is happening
On one of the wires yes, but I was asking if there is power at the coil or key purple wire. One of the 2 wires on the ALT other then the orange wire comes from the 50 amp breaker. The breaker has Bat voltage full time
Should be looking for volts not ohms, unless your talking about across contacts
The original problem was motor won't shut OFF. If that's still true then there should be 12V on the coil with key OFF
Unable to determine what manufacture but do see some corrosion issues. Maybe remove wires, clean and reinstall may fix the issues, or at least some of them
Motor not shutting off may be a bad key switch or other.
With voltmeter check for power on the purple wire with key off. If you have power with it off then disconnect purple wire and see if it goes dead.
If it does not go dead look for something miswired
