I purchased a 01 TR21 with a 3.3L 225 H.O. Evinrude motor. I purchased the rig from the original owner and he advised that he had always used the "flip down" OMC motor prop. I didn't give it much thought at the time. I figured if thats what he had been doing for the past 4 years it must be fine. This past Sunday when I got to the boat ramp I fielded yet another question about where was my motor toter and did I understand how much additional stress I was putting on the transom of the boat. I checked the Evinrude owners manuel and it looks like they recomend using the OMC prop. What is the rest of the Evinrude world doing in this situation? Lastly, This is the first OMC motor I have ever had (been Merc's up till now).