I boat a used boat about 7 or 8 years ago and now need a new prop. The part # on the prop is 48-825902-21, offshore mercury marine series. Should I stick w/stainless steel or does it really matter? I run it in lakes and the delta. The boat is a 2003 Laser Vision w/a MerCruiser 350 Mag/Bravo One; 375 HP; 22+; 3100 lbs.