90 HP Yamaha 2-Stroke Problem

My neighbor is having a problem with his motor. Every now and then, just riding along normal, it will start to cut out and finally stop. He pumps up the bulb and it starts right up and runs the rest of the day.

Any ideas what this may be, i.e., weak fuel pump, bad bulb, pin hole in fuel line, etc?

Thanks,

Homey

sounds like trash in the carbs to me

2200 Pioneer Bay sport
250 Yamaha 4 stroke
16ft High Tide
90 Yamaha