Thanks for the info John, I really appreciate it. I have a couple of more questions if you have the time. My 75 engine calls for a 13x6 prop preferably wood. On the real plane you really have to be careful not to add the power too quickly otherwise it will suck water up into the prop and damage it regardless of whether it is wood or metal. You can even see a small vortex at idle. Do you have to see if the prop is too close to the water to decide on the size prop? I have a 13x6 nylon and a 12x6 nylon prop also. I checked with pilots at the local field and the only thing that they told me is to really add the power slowly to9 keep the plane from veering to the side. If you have any other tips, I would really appreciate them. I plan on breaking in the engine tomorrow, but I am going to do a lot of research before I fly it. It is all done with the exception of parallelling the floats and adjusting the water rudders.