Originally Posted by russlars
I'm pretty sure that is the old bracket and original alternator. When mine broke it was the bottom hole in the alternator which required a new alternator and then they added an extra bracket that hooks to the top bolt and another part of the motor for additional stabilization. I don't have a picture of the new style, but here is the picture of my alternator with the broken bracket.
On my boat the bolt failed not the alternator flange, a new grade 5.2 bolt was only 3 bucks or so, I am afraid that a grade 8 bolt might cause the flange to fail as in your picture. Your top bolt looks to be stamped as a grade 5.2.
I will order the bracket as it seems to recognize that the either a bolt or a flange will fail.