Hello all. I know there are many posts pertaining to this topic, but don't think I found what I am looking for. I have a Lowe 21' pontoon boat with a 2006 Mercury 60hp Big Foot motor. I want to add an aditional battery, so I bought an isolator. I remember using one on my car once, and connected the alternator to the center post, and 1 battery to each post, and the starter came off the first battery. Well, when I looked at this Mercury a little closer, it looks as if the same cable is used to charge the battery and to start the motor. Is this correct? There are only 2 cables, the positive and the ground, coming out of the engine. If so, how would I get this system to use a 3 post isolator?
Thank you for your time,
Mike
Thank you for your time,
Mike