1989 supra ts6m shaft.

[SquamInboards]

This is my go-to prop lapping reference video:

https://www.youtube.com/watch?v=2ozh4JjoWm4

[chris young]

Yup, mine as well. When I did mine, I did it also with the shaft out of the boat, made a little adapter so I could put a drill one the coupling end. I was doing it by spinning the prop on the shaft by hand, but it was taking forever. If I was going to lap it on the boat I'd build something to spin the prop with a drill.

I do believe everyone should watch the whole video because he addresses all the issues. I think fitting the key and making sure the prop is seating on the shaft the same depth with or without the key is one thing that a lot of people may skip over, and all the lapping in the world won't work properly if the key is keeping the prop from seating. As I've posted numerous times in the past I lost my prop due to improper lapping. I was very fortunate that the shaft didn't crack(I did a die penetrant check at both keyways while the shaft was out) as for a while I'm sure the prop was banging against the key. I also went the extra bit and heated the prop in a 200 deg oven before I put it on the boat. With that extra step I think I could probably run the boat even with both of the nuts missing LOL. (which btw is how I lost my prop)