OK here is my problem , I have a 2001 Pro V 150 and it starts up fine and will run but when you run at WOT (4500 RPM) the motor acts like it ran out of gas but the motor will start right back up and run . I replaced the main fuel filter but this didn't help it keeps doing it it will run at a lower speed fine (3000 rpm) but will not run at WOT I also checked the hand pump fuel bulb and it is firm but not hard so can someone please help me and tell mw ehat else to do.