Smitty010203
Twelve Pointer
If it is doing it with two props I am betting you have your motor too high, cavitating.
That's what I am hoping. Maybe I just wasnt thinking clearly when I set the motor trim (manual with a pin). I would have screwed that up twice though because I lifted it out when I swapped props and put it back down. I probably looked 10 times to see if that was what it was but I am about 99% it was all the way down.