Heard this on CarTalk today, as I'm a NPR nut these days .guy has a boat that ran fine all day starting and stopping engine throughout the day. Ties boat up that evening, comes back the next day and realizes he left lights on and battery is totally dead .0.0 vdc marina removes battery and charges it in the shop. re-installs battery.Tries to start engine but starter motor runs, but the clutch on the shaft doesn't engage the starter gear to flywheel.Test starter on bench, starter engages fine, reinstall in boat, starter spins, but no clutch .I've never heard of this, it seems marina guy reversed polarity on the totally dead battery and it took the charge backwards thereby turning the starter backwards as well. Installed new battery and all was well. Anyone else ever heard of this being done? Is it even possible??