So, this has been going on all summer. If I leave the boat sit for over a week, battery is drained. But, the master switch is off. I thought I found the problem but no. There is a black wire from the negative side of the battery that has a fuse in it. Took out the fuse and the amp for the radio did not work. So…not the problem. Battery still drained. There is also a red wire from the battery but when I took the fuse out of that, no dashboard. By the way, the battery is only two years old. When I charge the battery all is good, starts every time unless sitting for multiple days with the MASTER SWITCH OFF. What is going on?
Cheers.
Tom