leaving marina could barely steer one way back to slot1/2 arc almost nothing the other almost fully intact. Angled back to slip.eventually pulled boat mainly due to sound of prop hitting apeture. Out of water,marks on rudder, also notice on one side of skeg a small block of fbg which stops rudder fromover turning, other side has none , prop hits on this side in past. Remove cap & find NO key andhead not lined up key way to keyway.This I can fix.....But have gears or clutch been damaged...Last few minutes preceding failure hitting sound was more like metal on metat!!!!???? Will have westerbeke deisel man look at it! Comments on this and rudder shaft replacement very welcome!