Guys, have F250's and fish NE canyons.Have noticed that every year have less speed.this year am winding up 5000 rpm and am turning 26-27 knots, last trip to the Hudson was 5100 rpm burning 35 gph. most trips is 4-5 guys,overnite gear, 500-600 lbs ice and alot of chunk bait.what are others burning? should I be looking for a problem like injectors? Blades are perfect, bottom is painted every two years with ablative, thx in advance.