so i got NO help in last post so here goes again.1988 cajun bassboat.18 1/2ft w/1988 mercury 150hp xr4 black max.small jackplate,stingray hydrofoil,laser11(two)SS 21p prop.diameter unknown(number on prop is 48-16546A45 21p).2 adults@220lbs. ea.,3 batteries,@15gal. gas,and normal bass gear.dry...