I have a 22.5 cabin cruiser with a 5.0 v8 15 diameter by 17 pitch prop.when loaded with 4 adults the boat will not plane and can only reach 2100 rpm at wot, it should be between 4200 and 4600 rpm at wot per spec. sheet. I can plane the boat with 2 adults but can only attain 3100 rpms at wot, my...
