I have a 2016 180 that I bought new last August and now have 65 hours on it. I have not run WOT but have been up to 3800 rpms and hit 28 knots with the top down. With top up same rpms give me 24-25. I looked in my Yamaha info but don't see the prop called out. It is what came with the boat so you could probably ask GW cust. service if there's a standard prop they use for the 180. I hope you enjoy your boat as much as I enjoy mine. I traded in a Seafarer which I had for ten years but now I stick with back bays exclusively and the 180 is just the ticket.
Hope this helps.
B8CASTR.