I'm not sure if I'm posting this in the right area. Sorry if it is wrong. So I bought a 2003 Stingray 200lx, test drove it, everything worked great. I did see a battery jumper on the swim platform when it was in the garage. Went to drop it in the lake today and it wouldn't start. After a couple trys the battery started loosing power. It is fuel injected volvo 4.3. I took the battery and got it tested and they said it was a bad battery and I haven't had the time to go try it out. Do you all think this could be the case. The voltage meter read 10 - 12 on the gauges. This is my first boat and was pretty excited about taking it out and then this happened.