I have a 2012 Eyra and am running a 26 pitch Fury. When the boat was new, one person, lightly loaded (had not put my BassPro Shop tackle store in the boat) it would run 82 at 6000 Rpm, about 78-79 now. I also use the 4 battery setup. I tried a 27 on my last boat, a puma, and was not happy. I have my prop at Ronnie Gilberts shop for a complete repair including balancing and blue print. Ill let you know the results