Looking at new Yamaha 4 Stroke and dealer has new, in-box 200 HP in model years 2003, 2004, and 2005 with approx $800 difference in prices (older being the cheapest). Does anyone know of any particular changes in the models from year to year? As they are all new, they all come with the 3 year warranty. Can't find any site which describes differences in model year so any help would be much appreciated.