Bulb/fuel line issue….

[charlie_the_tuna]

I’m running home last week after a day of fishing and I’m at about 4,600rpm. The rpm’s drop a couple hundred and back up and back down and then drop all the way and shut down. It restarts right away and I bumped it back up and it happens again. So I figure let me check the bulb. Soft. I squeeze it hard and start back up. Runs fine for about 25 minutes and happens again. So I squeeze and head home and it runs fine.
I’m out today and it happens again. Same thing. I squeeze and it runs fine.
My plan is to run it best I can and address it when I’m out after the season. I’ll replace the fuel line from tank to motor.
I haven’t done any required maintenance yet. My plan was to do all maintenance after the season.
What could be the cause of something like this? Will replacing the fuel line fix the problem?
Spare?