I have posted this in a couple of other forums as I need some help. Does anyone have any ideas?

I have had some battery problems in the past, but it now appears that I have a voltage drain on my starter battery. I don't know how much, but it ran down my brand new Optima Battery from 13 volts to 11.2 in less than a week while it was sitting in my garage.

It seems to be leaking even when I have all of the main breakers turned off.

I have a Yamaha 225 on my 520 Ranger. Is it normal for that Engine to pull some current all the time...perhaps for computer function or something?

Does anyone have any suggestions as to where I should begin in order to solve this issue or have any experience with a similar problem?

Thanks in advance for your help!