Need some help guys. My motor has a strong pee stream in the water at idle and slow to medium speeds. Once the boat gets on plane and I am close to wide open throttle the motor stops peeing and steam starts to come out. Once I cut back to idle it starts peeing again. I initially thought it could be the angle of the motor but I have tried several adjustments and I still have the issue.

I cant find anyone else experiencing the same issue. Impeller? TIA

95' Evinrude 30hp