How to take prop off Bravo II

[humphrys]

Hi,

I think my prop is slipping and I need to get it off. It's a 25' Grady and I can't take it out of the water. With the outdrive all the way up it's still underwater and I can't tell how to get it off. Every other prop that I have taken off uses a cotter pin to hold the bolt. This has what looks like a very large star washer under the bolt, where one or more
of the star points (they are actually more like small rectangles) pushed into recesses.

With my small screw driver I could not lift the depressed small rectangles out of the recesses. Is this washer attached to the nut?

I could not budge the nut with large vice grips, but that may because it is attached to the washer. I will bring a large screw driver this time and a breaker bar with a socket. I'm hoping the nut is 1 or 1.25 since those are the only large sockets I have.

Any hints are greatly appreciated.


john