I am new owner of Allison SS 2000 excel 2011 with Evinrude e tec 130 DPLIIR 11/2010, spline 13, low water intake,gears 2:1 ,185 r.hrs, living in Dubrovnik Croatia. My propellers VIPER ss 13 7/8" x 19", max achiving speed is only 51-52 m.hrs with 6150-6200 revs reaching eng.limiter. I play with...