I have a 2008 Moomba Mobius LSV.
It has an OJ 13.7 X 17.5 MVC 1-1/8" prop on it now. I'm guessing this is what came stock as I have not changed it.

Is there a better choice or upgrade?

I like to slalom, wakeboard and surf.
Looking for better gas mileage and better pull out of the hole.