I've got a 2004 90hp Yahama, problem I'm having is...at full throttle it will run along like a champ, then all of a sudden, it starts to sputter...as if it was running out of gas. I will back the throttle off and then it will run just fine. Sometimes it will die, but will always start back up and will run perfect until I run it full throttle again. This only happens when I run it wide open. I checked and cleaned the fuel filter, but it didn't fix the problem. Any suggestions?