Car battery for starter battery in boat an issue?

[fisher_king2004]

Is there any issues in using a car battery instead of a marine battery for your boat starting battery?

I know the marine batteries are tougher and will last longer. A friend is having issues with his rectifier/regulator failing and he is using a car battery for the starter battery in his boat. If working properly how many volts should the rectifier/regulator put out when going full throttle?

[BobT]

An automotive battery in this application is fine. A marine battery is typically a dual-purpose battery which falls between a starting battery and a deep-cycle battery. The advantage of using a marine battery for the main starting battery is that most boats are wired to use that same battery for operating lights, live well, bait well, bilge pump, and other electronics found on your console. For this reason, a marine dual-purpose is a better choice.

[Whoaru99]

If working properly how many volts should the rectifier/regulator put out when going full throttle?

I think you'd like to see 14V, give or take.

[delcecchi]

Mine is about 14.4 according to readout on depth finder. (it has voltage display as option)