I have a 95 Yamaha 200hp outboard.  Engine starts a little hard, but runs very well once it gets going.  When I restart the engine in neutral afer running for awhile (stop for a little fishing), the engine stalls when I put it in gear and give it some throttle.  It'll idle along in gear at about 1000rpm, but stalls if I try to accelerate.  If I nurse it and fiddle around with it for awhile, it restarts and runs fine again.  Have put in new in-line gas filter, cleaned gas filter on engine, primer bulb is ok, and have had carbs cleaned.  Done the simple stuff.  Mechanic suggests problem may be in Alternator/Stator not putting out enough volts at low end.  Says output should be 14V.  Gauge on center console shows about 11V while engine is running.  Any ideas?  Thanks.