You forgot a couple very important things A. Know how deep it is- you need at least 6 feet especially when learning and you pitch too far down and hold the throttle too long. Have broken many a motor mount and cracked noses.. especially doing nose stabs in surf B. bilge pumps - doing subs, nose stabs and learning barrel rolls will fill these things up fast. Dual 500 bilge pumps or scupper kits are smart, both even better.
nope. it will allow water into the hull, but that water gets siphoned back out into the river as you start moving again. if you take on too much water, you could suck some into the engine and cause your ski to run poorly