So after all of the work, the ski runs well. My only issue now is that when I put it in reverse and give it gas, the reverse handle pops down to the forward position lifting the scoop in front of the pump (from the pressure of the prop wash), and the ski starts going forward. I have tightened and rechecked the screws on the assembly to the right torques etc.

I can hold the reverse handle, and it will stay in reverse, but not on its own.

Any ideas?