Even though the responses may have answered your question re the props, if you do not have the original Hatteras manual that came with the boat, order it from Hatt. It used to cost $75 and at four or five times that price, it's one of the most useful things you can have to help you understand/maintain the systems on the boat. It is NOT a generic operating manual that was the same for every boat of that model. It will include all the line drawings, all system info/use, paint codes, light bulb types, wiring diagrams and the specific equipment that was installed on YOUR boat - by hull number - when it left the factory. It is the only reliable way to determine what your boat was like originally and it's a great help in correcting issues that previous owners/mechanics created when they "upgraded" stuff...especially anything that has any sort of electrical wire connected to it...