I have a 28ft Tahoe tritoon with a 115 Mercury max rpm 5900. When I got the boat it was used and had a 13 x 10 pitch prop. It would cavitate pretty bad when turning. Went to a 14 x 11 pitch. It no longer cavitates however I lost top speed by about 10 mph and only can get 4900 rpm. Is there a prop that will fix the cavitation and still give me the top speed?