****HELP**** Boat will not crank!!
So about three weeks ago we too the boat out for the first run. It is a 2000 Moomba Outback. When we got down to the water I realized that one of my battery's was bad. I took it back to the parts store and swapped it out and the boat cranked fine and ran great. We only were out for a hour. Two weeks later we took it out for a nice day on the water. I ran the boat for three hours with out a problem. OK now the rest of the story.... Memorial day we attempted to have a nice day on the river. I charged the battery's the night before so I would not have any issues. We dropped it in and it fired up perfect. We rode about five minuets down the river and shut it off so the kids could jump in. We were there for 10 minutes and went to fired it back up and nothing happened. I had a guy tow me back to the dock and I jumped the boat off with my truck. It fired up and off we went. We rode up and down the river for about a hour to make sure the battery's were good and charged. We dropped anchor for a couple of hours and I cut the battery switch off. I fired it up and it was fine. We pulled my daughter on the tube for 30 minuets and turned it off to load her up and it would not start. So I got towed in again. I ordered a new alternator and just got it installed. Now with the battery fully charged it will turn over twice then nothing....HELP!