Hi, Have 2000 Checkmate 17.5 feet, with a 2010 evinrude 150hp etec on it. Right not I have a 22p prop, not sure of diam (having ski pole installed). It runs about 55mph at 5,200rpm wot. Has great hole shot with me and one more person. But trying to pull tuber and 3 other people, very, very bad...