This was passed on to me by my neighbor at our campground…we both have F150’s that do the same thing, they run great, just when taking off they stumble and sometimes die. They start right back up and will run fine, just can’t gun it.
He said he had his in last week, the tech took the line/bulb and installed the bulb right next to the motor, per Yamaha’s instruction. I mean it has maybe an inch of fuel line coming out of the motor, bulb then the rest of the line going to the tank.
He said his motor no longer dies/stumbles out of the hole.
I havn’t had a chance to do the new install on mine but will soon.
Might want to give it a try.
BIRDDOG