I have a 1998 Johnson 150. Motor starts easily and idles well for several minutes. However after several minutes or an attempt to accelerate the motor dies. I can maintain an idle by pumping primer bulb occasionally but this only works at an idle. I have replaced bulb and fuel line from tank to motor. Does the loss of pressure on the bulb indicate a problem between the bulb and the tank? Or could it be an issue with fuel diaphragm or VRO pump?
