Jetdrive question

[joken1032]

I have a 1995 150hp v6 jetdrive. Believe it or not I have never sucked gravel with the thing until today. The impeller is not pumping and I don't know if it's just full of crap or if the impeller is free wheeling. I don's see a shear pin in the schematic, rather a special impeller key. I assume this key serves the same purpose as a shear pin. Any input will be appreciated. Ken

[rodbolt17]

not really.
however its a simple setup to dismantle.