I have an 05 navigator with a 60 hp merc tiller. The best prop I have found is a 11.25 x 10p. This one is quick out of the hole and max RPM’s is 6000. I do get a lot of spray from the out board and I am thinking the motor may be mounted wrong. These are very heavy boats and I’m surprised with the sixty max hp on the tiller. Seems like a 75 or 90 would be ideal?? Side Note: the new merc flo torque prop does perform better than the standard merc prop. Nick..