I have a 21' 1999 Centurion Ski Boat with an inboard 350 Mercuiser V8. Right now it has a 13x13 LH 1 1/8 Prop that is stainless steel. I'm looking at trying to get more top speed. With 5 or 6 people in the boat the top speed is only 30-32 mph (true speed from my GPS. Boat reads more like 35...
