Welcome Pete,
with the bow lifting as you described, try tilting the motor down further, if it's already right down and still lifting adjust the spring loaded lever on the engine bracket to a setting that makes the engine more perpendicular . try one hole lower at a time and it should come right. If all fails go see the dealer you got it from . you shouldn't need the 300 sport but they do help with leaping out of the hole
hope this helps
Jimmy