posted 04-20-2011 03:48 PM ET (US)
quote:
A standard deep cycle battery should be fine. You're not running a big motor on the boat, so the starting current won't be excessive, and you can likely pull start it if you needed to.
My first ever boat, that I got not even 3 years ago, had a 1959 35hp Johnson Super Seahorse. After some research, I found that mine had the rare, generator/voltage regulator, charging system, with the rare and expensive, toothed belt to drive the generator. Only, the voltage regulator had been removed. Once I found out how rare and desireable that option was for collectors, I removed the toothed belt, and ran the motor with no charging system to charge the battery. So, I did what Dave suggests in the quote. I got a deep cycle battery to start the motor and run the lights. At first, I was careful and dilligently charged the battery every time I got back from boating. In the end, I found out I could go WEEKS without recharging the battery. I could get dozens of strong starts plus at least a handful of hours of basic nav light operation, (two bulbs: white all around, and single bulb, split red/green housing), on a single charge.
I concluded that for a small boat like a classic 13, most users would be just fine, electrically speaking, with a single deep cycle battery and an outboard that has no charging system.
The new owner of my old boat got a second battery to run his bait tank. I never had a bait tank. He also stays out all night sometimes. He's a hardcore fisherman.
-Peter