Long story, but I lost my prop to the bottom of the lake. I have a 1978 Evinrude 115hp on an 18 foot Crestliner. I'm new to boating and I'm not sure what was on there. <br /><br />Can anyone suggest a prop size and pitch for my new prop? I want to be able to waterski with this boat. Also, I know I've lost the cotter pin, castle nut, washer and prop, but is there anything else that I would have lost?