Prop walk to port

[toddhaugen]

I just bought a 1989 TS6m from my uncle and it has a funny behavior, it pulls to port in reverse. This was not always the case, it used to pull to starboard, but it changed when the shaft was replaced about 5 years ago. It looks to me like it is a 13" right drive, 3 blade prop with a few nicks on the ends of the blades. Is this the original prop? I cannot find anything about the factory prop in the manual or on the Michigan Wheel site which was the supplier of props that year.