The pontoon boat I bought (haven't picked it up yet) has a single 12V
Interstate battery and a 60 HP "Tracker" by Mercury O/B
It has an automotive type CD player/radio and a 12V "cigarette lighter"
outlet.
Has anyone ever tried to run an inverter off such a set-up ? Nothing too
big, maybe 400 watts

I had never considered an O/B motor as having a significant electrical
OUTPUT but I guess it must be enough to keep the battery charged.
Also, I'm wondering if the boat is stationary at night with the nav lites on
and also the CD player, (O/B not running) how long the battery would last
before it might fail to start the O/B ?