First of all thanks to those who helped with my last questions. I am pretty new at boat ownership so any advice is really appreciated. I have a new Nitro 750NX and it came with a Mercury 75 2stroke. I started it up in my driveway for the first time with the garden hose and engine muffs. It sounded like the engine runs a little rough and also sputters. I'm not used to a big engine so I am not sure what to listen for. Is this normal for a new motor? I know the dealership also put a special mixture in the gas telling me since it is new it needed it. They also advised not to go over 3000rpm for the first ten hours. I can't wait for the maiden voyage and hope the motor runs smoother in the water. Thanks and this is a great web site.