prop and top speed for 17.5 open bow 3.0?

[TWIZLR]

Just asking cause I want to buy a new prop for my little boat. It's a 1993 Glastron 175 with a Merc 3.0LX. Currently it has a 14.5 x 18 four blade that isn't bad, just doesn't touch the rpm range at wot. It'll hit 4200 at 38mph wot and shoots out of the hole pretty quick. I was just thinking about buying another to see if I can get a few more mph out of it. Usually just my wife and I and our dogs. Would like to see if any 3.0's hit the 45mph mark.

 

[Ten Years Gone]

edit