The stator produces AC current, which is then changed to DC through the rectifier. The good news for me was that our outboard motor, an 8HP Yamaha 4-cycle (model F8MLHC), already had generator coils installed (on top of the flywheel) at the factory. Product ID: 6X9-82570-40-00 / 6X9-82570-00-00. The F350 is available in three sizes, extra-longshaft 635 (25. "The output of the F300 Offshore model is stated as 70 amps. Hi,I have noticed that Yamaha on a new outboard, the F150 4-stroke, has in the specifications how much alternator output is at 1000 rpm, for F150 they say. May 13, 2009 #1 Hi, A couple of questions, would appreciate a reply. … Is it possible to add an alternator to a 2002 F9. Yamaha outboard motors are known for their exceptional performance and reliability.