Hello all, I have a 1989 Evinrude 90 on a 16 ft. Skeeter SD-80. I keep reading how I should be turning 5800 RPM'S with this motor wide open with an average load but cannot get close to that number. A little info on the motor, it has a new CDI power pack, new coils, 120 psi in all 4 cylinders...