Thats whats called a spun prop.
I bought a new prop for a 1970 small Evinrude fro iboats for about $50, delivered.
I dont have access to a boat shop that could fix mine, if they would even try. For me, the wait to get it repaired, no matter how long it'd take, wasnt something I wanted to wait for. If I could have found a place to send it to.
I know a spun prop can be fixed, but for a small outboard, w a small prop, replacement might be quicker and easier.
Hopefully otherembers that have had them.fixed will comment.