The boat is a 21 Renegade the carb is a 600cfm marine carb with elect choke.I researched alot of different carbs and had some good advise on why to choose the Edelbrock.The engine is a small block 350/io with alpha drive runs about 54 mph spinning a 20 4 blade ss. Im sure I will have to have my prop reworked.I have not had a chance to run the boat yet but im thinking next sat at elsinore??? sure hope it makes a difference.