[me and my metro]

Well now you’ve done it. Of course it is going to die when you need it most. Or it may outlive both of us just to prove us wrong. It is not going to get any better with time. I had an air cooled Honda motorcycle stick a piston due to overheating out in the desert. When it cooled off we bumped it free and rode it the rest of the weekend. However you have damaged the bottom end due to oil starvation. At the very least it needs a crank and a couple rods. You should still be able to get parts for a 1980 outboard if it is a name brand.