I have a light SUV17 with a Mercury 25hp 2 stroke, power tech cupped 3 blade prop, TSG custom manual jack plate and a Bob's cavitation plate. My pin is in the 2nd from the bottom on my motor and my cavitation plate is 4" from the bottom of the hull. When I'm running the cavitation plate is out of the water with just the downward fins in the water. I have no problems with blow-out at all and since I have been running this set-up for over 50 hours and have not killed my engine I would guess I'm getting enough water pressure. I get much better hole shot in the 1st pin setting, but it does not feel as nice as the 2nd. Does it sound right where the cavitation plate is? Do I go higher on the jack plate? I have no water pressure gauge. The hull is flat bottom with no tunnel and the jack plate has a 4" of set back.