Was running across the lake at 4000 rpm and it starts losing rpm and then will just barely idle and no change with throttle change. Let off gas and it tries to die then sputters and quits. Wont restart, just tries like it is going to. Went to the primer bulb and squeezed a couplke times and it starts and runs fine. Did it a second time later in the day and went to primer bulb and it is soft again. Squeezed it 8 to 10 times before it got hard and it started and ran fine. No alarms and no lites. Someone tell me how a primer bulb should feel while motor is running. Also could I have a fuel line collapsing or a bad fuel pickup or inline filter. Help please,this motor scares me when it acts stupid.