I have a 1994 rinker with a new 5.7 yamaha 300hp short block installed have a yahama out drive with 1.5 gearing. And run a ss 14 3/4 in prop x 19. I run wot at 4400 rpm at 51 mph with half tank and me alone. With 6 grown adults at wot 4500 rpm at 45. mph. I tried a four blade 23 pitch 14 inch...
