i took my boat yesterday for first run on break in first hr under 2000 rpms ok second hr not over 4000 well fron 2000 to 4000 the boat would porpoise with the motor trimmed all way down, i am only showing about 10 lbs water pressure, if i go ahead and open throttle it will get on pad and run 5800 rpms and 58 mph with full tank gas and 2 people weighing about 450 lbs took boat back to dealer they said the motor was mounted high for max speed my question does porpoising at low speed normal for this set up i never had a boat do this with motor trimmed all way down. some of you xperss guys please give me some advise. x19 with 175 sho and 22 pt yamaha sho prop which showes in there bulletin