I'm having a problem with my 25' Sportscraft I/O and wanted to know if anyone has had this problem. When the boat starts out in the morning its runs like a champ going about 25mph at 350-4000 rpm's. After 15-20 minutes the speed and rpm's both drop way down. I went into Canada and by the time I hit the line I dropped to 2500 RPM's and 17 mph and then to 2200 at 14 mph??? The Fuel Filter and Water Separater are both clean? Gas pumps in fine without backing up and shutting off the Pump so it must be vented OK? Its a I/O with a Edelbrock ? Carb. and a Bravo 3 260 HP Merc.
Any Ideas?