Hi men,I think I have a low speed problem.....this is what I have: 16 ft Lowe Roughneck(utility) 1-5 gal. gas tank,a starting battery,and an'05 40 HP E-tec the numbers stamped on the aluminum prop are 14X13 my top speed is 27.4 MPH (GPS) I need more speed to get off the lakes in a hurry.All the...