RE: fine tunning K&B outboard high RPM
I think the word that he wants is throw, not through.
The cavitation plate is what is keeping the engine from tossing a big 'tail. A roostertail isn't everything. If you've ever seen a FAST boat run, their roostertail comes out flat. A high roostertail comes from a prop that is too high. Compare it to smoking your tires, it looks cool but you're not going anywhere.