... The remedy is to pump the bulb a few times every minute or so (more if the engine is cold) when idling. This is a PITA when entering/exiting the marina, but not too bad... figuring out how to fix this is on that loooong boat maintenance list I keep in my wallet...)
Have the same problem with my 9.9 Evinrude. It's stranded me overnight because of this issue. Nowadays, I pump the little bulb a lot. Hoping fuel pump replacement kit will take care of the problem.
Defintely would like to get a new Yamaha by next Spring.