YAMAHA OUTBOARD ??????

I HAVE A QUESTION, WHAT WOULD MAKE A BRAND NEW YAMAHA 25 TILLER OUTBOARD MOTOR SNEEZE OR MAYBE IT SOUND LIKE A COUGH AND SOMETIME IT WILL DO IT AND CUT OFF. IT WILL ALWAYS START RIGHT BACK UP WITH A HALF A PULL, IT RUNS FINE AT HIGHER RPMS AND W/O THROTTLE BUT AT IDLE IT WILL DO THAT SNEEZE AND COUGH. HAVE ANYBODY EVER SEEN THIS BEFORE......?

THANKS IN ADVANCE
JAY......

possibly a lean idle condition. Could also be a reed, but that is unlikely. If it were a reed, it probably wouldn't run well at any RPM. Did it start all of a sudden?