I started my 91 last night.  It ran very well.  It seemed to be running at a very good idle, but my tach battery was too low so I could not get any good readings at any speed.  Plus it was just to d#%^m cold to hang out in the garage with the door open and changing throttle settings in the prop wash.  It should be warmer tomorrow and I already replaced the tach batteries. 
Man it sure did sound great.  I love 4 strokes.