1988 Astroglass 166v 17' bass boat.1988 90hp v4 vro.I need to try to figure out where to start with this. <br />It came with a hydrofoil (not hydrofoil brand) a 15"x13 3/4 alum. prop,a 17"x13 3/4 alum prop and a 19x13 stainless prop. Old owner said he put the 15 on it for the hole shot. is it worth putting a 4" spacer or jack plate on the moter and any Ideas what prop to start out with? or any other ideas.<br />Thanks