I just purchased an 08 Ranger Z21 with a Mercury 250 Pro XS. Slide Master jack plate and tempest fury prop. 25P I believe. My question is in regards to getting higher speed out of the boat. I can get the boat up to about 58-60MPH at around 5100 RPM. It seems like after I tilt the trim up at this speed, it just wants to cut to the left hard. I know I should be getting at least 69-70 MPH. It may be my inexperience, but I was just curious.