Im not a motor guy or anything but been rebuilding a boat with a 25 hp mercury motor and have just got everything done on motor such as carberator and exc. once i tried to start it up for the first time my brushes inside starter melted so replaced starter. Just installed knew starter and once i turn over key the starter teeth catch the flywheel and will not turn it from there. Not sure what the probleme can be and dont want to burn up knew starer. My flywheen turns by hand so i know it should be turning with no problem. Any ideas or information can help thanks. DON