Moderated Discussion Areas
ContinuousWave: The Whaler GAM or General Area
|Author||Topic: low batteries|
posted 05-10-2002 03:40 PM ET (US)
I have 2 low batteries on my Montauk (it has a dual battery system in the console). Can I jump start them with a car and jumper cables? Are there any secrets to this?
posted 05-10-2002 04:25 PM ET (US)
Tarracott: Do the batteries hold a charge?
posted 05-10-2002 04:40 PM ET (US)
Yes, they are just dead from lack of winter use.
posted 05-10-2002 04:47 PM ET (US)
Tarracott - yes, you can jump your boat boat battery(s) to you car battery. But, consider just hooking up a battery charger - easier, probably cheaper, et.al. But, realize that if the battery is REALLY DEAD, some battery chargers will not pick it up and then requires jumping to a vehicle battery/charging system to get the dead battery off the bottom - to where the battery charger can pick it up.
Secrets - not really - just make sure that you hook positive to positive and negative to negative. ---- Jerry/Idaho
posted 05-10-2002 07:11 PM ET (US)
Also, if the batteries are not maintance free, check the water in them as well.
posted 05-10-2002 07:36 PM ET (US)
It's a really good idea to keep a battery
on a smart trickle charger when it isn't
used for a long time. I don't drive my
'Vette much, it lives on one, and I think
the battery in it is nine years old.
The Montauk goes on one too whenever it's
posted 05-11-2002 12:43 AM ET (US)
I buy decent batteries (buy by weight) and rotate them out of marine service into shop rigs every third year. Yeah, don't run them dead dead. Easy to fix a dead shop truck battery along the highway.
posted 05-11-2002 09:02 AM ET (US)
I would avoid trying to jump-start the boat if possible. Let the batteries regain a charge from a charger.
The problems with jump starting:
--you risk some high current sparking, which can generate some rather strange effects, including destroying diodes in things attached to the battery circuit (like the diodes in the alternator/charging circuit of the outboard).
--once you start, your outboard will be trying to charge two dead batteries, which will put a heavy load on its charging circuit. Since this is a MONTAUK, you probably have an outboard motor that develops its charging current from a frail little stator winding under the flywheel and is rated for 6-Amps. Run around for a few days with this circuit pegged-out delivery maximum output trying to charge the batteries and you may just cook the coil windings of the stator. That will have you looking at a big repair bill.
--it is better for the battery condition to rebuild the charge in them slowly with a modest current applied over a long time. This will produce better chemistry in the battery plates.
If you are stuck 40 miles offshore, get a jump start. If you are stuck in your driveway, use an AC-operated battery charger and let it run on the low-current setting for several days.
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