Compare your old prop and your new one first........
Some of the Carolina Skiff boats have a "hook" already built into the hull
to help them plane better with small motors. Fixed tabs at the angle needed
to plane quickly will force the bow down too much at speed, resulting in
plowing and slower top speed. Try one of the hydrofoils mounted on the
cavitation plate, or try some of the "automatic" tabs that are available.

Bill Sheffield