So I bought a new Tracker Grizzly 1648 MVX SC w/ 30hp Merc 4 stroke. No RPM or GPS speed yet (no tach) but it def. is not planing and motor seems to be lugging, not in the sweet spot after minutes of WOT. Loaded with 240 lbs of me and maybe 150 of cooler, anchor, tackle, tools etc. Running at...