Ok, I am like most guys. I want more speed out of my motor. I posted a question a little while back about it blowing the head gasket and got some good replys. And after taking the advice and pretty much wearing my arm down to a numb nub by working the head piece around and around on several different pieces of emory cloth the true it up. I am ready to move on to the next problem. More speed. I just can't accept that it wont get up and go any better without trying other things to coax it along a little faster. The more I look into it, the more things I find that might be holding it back. I am running a 1976 Johnson 35hp. I think is pushing about 5500-6000 rpm's. I don't have a manual so does anyone know if that is right? I did some calculations using the prop on it and, I'm no mathmatician, but I think I am only working at half that, around 2600rpm. If I am close on that then that would explain why it has no get up and go. --------------------------------------------------------------------- 1. I think I might have the wrong prop on it. I got it with a 10.5x13 prop. It is on it now. But I am thinking of dropping it to a 10.5x11. (will that improve take off and top end? If so how much? ) 2. My neighbor says I need one of those fins on the cavitation plate ( how much would that help me?) 3. Another thing I foud out was my motor might be setting down a little too far. From a level line to the bottom of my boat out to the cavitation plate the motor is a little more than an inch lower than the bottom. The motor is about 8 inches out from the transom at this point. (I will have to have the transom built up a little to accomplish this. But I will have it done if it will help.) 4. I found that the motor was setting at a canted inward angle to the bottom of the boat and I corrected that. I think it might have been causing the boat to try and submarine down at the bow. Right now I can't lighten the boat any but later I am going to take all the flooring I just put in it out. And replace it with an Aluminum one. Thanks for any advice and help. If after doing all this, I can get it up around 30mph I would be happy.