hey guys,i have a 2000 18v90 kenner with a 2000 90hp mercury 2 stroke 3 cylinder on it. i was getting 36mph with a stainless 3 blade 13.25 inch 19 pitch prop at 6000 rpms. i know the working range of the motor is 5000-5500 rpms so i went with a 13.25 aluminum 3 blade 21 pitch. i am still getting...