In the performance circles of jetski they market the idea of almost nothing between the water and the pump however the boats do sit deeper in the water and unless wild turning you prolly do not starve the pump - not so easy to wave jump a with a boat, I would think if you have cavitation trouble it is because of the seal to the hull is allowing air seepage - if you have the tilting weed grate maybe someone ran aground with the gate open and damaged it, I bet you could use the jetski part and marry it to the tilt feature with some 2 hole pipe straps used in the plumbing trade - anyway the tilt grate is a great featureto get out weeds and junk.