My neighbor heard I was into boats and left me with a 1978 Evinrude 2HP to fix. It needed a new pull start cord. I was in a hurry and didnt pay attention so I took out the screw that holds the assembly together. When I got the cover, parts went flying. I have them, and it looks like I need to take the pulley apart to replace the cord, but any secrets on how to put this assembly back together?