Hi guys I am new to this site and new to boats. Any help I could gather on here would be greatly appreciated. Thanks in advance. Heres the issue I am having I have a 1976 Ebko boat with the 165hp mercruiser in it. The motor has been completely rebuilt. I put the boat on the water yesterday and at WOT i am only pushing about 2900 rpms. FRom what i have read i should be pushing about 39-4300rpms. Is this correct? I currently have a 14.5inch prop with a 19 pitch. I have been told if I change the prop that could fix the problem?? What should I change it too and how much difference will it make. Thanks guys I could really use your help.