Hi all, <br />I have a 1973 15 foot crestliner with a 65hp johnson on it. It's max rpm according to specs is 5500. It has a 13 3/4 X 17 prop on it. However, it is allum and is all banged up. Any suggestions on what type of prop I should go with? It is more of a fun boat, and I will be using it to ski for my 3 young boys. Mainly doing lake boating. We just bought it about a month ago. I was thinking of maybe getting more speed out of it. What reasons would I want to go to a 19" pitch? Thanks for help. I am new to the boating world and having fun with it.<br /><br />Norton