You probably will want a 20″ pitch in a Bravo LT. You may even be able to spin a 20.5″, depending on where your rpm’s are now. On the Bravo’s you move up 1″ pitch from the Yamaha 3 blades, if you would like to keep the apx same rpm. Just as an example, when I went from a 20″ Yamaha prop, to a 20.5″ Bravo LT, on my 2017 MX 2040, my rpms were apx 150 more with the 20.5″ Bravo LT, than the 20″ Yamaha prop that I had been using. Also a 3 mph lower planning speed with the LT, 1 mph more top end, and much faster acceleration. If I remember right, I was at a little over 5900 rpm’s, and 58.5-59 mph with the 20″ Yamaha. Bravo LT in 20.5″ was 59.5+ mph, at 6100 rpm. You will also want to raise your engine 1/2″-1″ with the Bravo props. While some people have said they can raise their engine more than that, that wasn’t my experience, as while a higher setting worked fine in a straight line, at two inches up, I broke loose in a hard turn.