Pissed off with motor, want to change

If you have voltage here and there on what should be non-energized parts, you found the problem. Disconnect the bulkhead connector and see it it's full of water. Same with the engine harnes connector. If you have brake cleaner or shop air, blow the connectors out and let them dry well. Then stick some di-electric grease inside the female connections, and reconnect. See if that makes it go away. Also, there should be grounds from the cowl to engine, and engine block to frame.