I pull my boat out every 2 - 3 weeks take it to the car wash and blast all the Green/brown crap off the bottom.
I don't have the can't get the lower out of the water issue;) (even with the anti fouling paint)
5500 -6100 is WOT for our motors, were it me I would go down to a 17 Pitch prop!
Only getting 5400 RPM @ WOT is lugging the engine (doesn't make 200HP until 6000)
Tough on $$$ hard parts.
The Prop Shop Mukilteo, Wa.
On my HEAVY ASS 25, a 19pitch is TOO BIG could barely make 5000 rpm! needs to be 6000 - 6200 at WIDE OPEN THROTTLE for the DF200