Looking at a new boat this weekend. It has a 200 Yamaha VMAX HPDI Series 2. I've ran Evinrude all my life, so I got questions about the motor. What's the difference between a regular HPDI and a HPDI Series 2? I heard it was something with the pistons but not sure. And I also heard a 200 VMAX HPDI is really putting out 225hp? Answers and reviews to this motor would be great. And it's 2009 with 75 hours.