[barnacle]

As I see it Mercury has a 60 amp alternator. THis is one system that work both the engine plus the onboard systems. Bombardier has a 60 amp alternator. Being a dual design there is more power available for the onboard systems, plus it offers a battery isolator for charging twin batteries. Yamaha offers a 50 amp alternator that works both the engine plus the onboard systems. There is truth to there statement. Like you said they all offer pleanty of amps for todays systems. It all depends what outboard brand you like.