I am a new Supra owner of a 2006 Supra Launch 22SSV as of Oct of last year. Due to being an idiot and not reading the manual (until it was too late), I have created a problem with my battery system that caused me to require towing to get back to my slip yesterday.
1. When I bought the boat, I was told to always switch from battery to battery on each outage (after reading the manual, I now know to always leave it on '1')
2. I screwed up and left my ballast pumps on after an outing - all batteries dead upon return.
3. On next outing, I charged my primary (non-accessory) battery and set the switch to dual (both 1 and 2).. Went out had a great day but radio did not work
4. On the next outing (yesterday), radio and front ballast pump didn't work but cranking seemed good and pumps for rear ballasts worked fine.. Then boom, no crank but ballast pumps worked.. Had to get a tow
5. Pulled accessory battery, brought it home and charged it, installed back into boat. Charged primary battery for about 30 minutes. Started boat and let it run for 20-30 minutes. Voltage gauge was about 14. However, cannot start with switch in "1" position, only dual and 2. No accessories work at all
Which battery is bad? I realize that I am an idiot for running the system, in "dual" as that only drains and doesn't recharge and I should always be at "1". I do think there is a problem with one of the batteries. Either it needs charged or is bad all together. I realize now that it will shut down accessories when power is weak to shift that to cranking but wonder when it will switch back. My plan is to:
1. Buy a new battery and take it on the next outing
2. Start the boat in either dual or "2" (only way it has the needed power to start)
3. As the boat is running, switch to "1" and run it for an hour or so to see if everything charges.
4. If it won't crank on "1" replace the primary battery
thoughts?