Moderated Discussion Areas
ContinuousWave: Small Boat Electrical
On A New Battery And Its Rating of Cranking Amperes
|Author||Topic: On A New Battery And Its Rating of Cranking Amperes|
posted 04-14-2009 08:47 PM ET (US)
[I] have a 2005 [Boston Whaler 170 MONTAUK boat]. [I] have decided to change my battery this year. [I] bought a [cranking battery with a rating of 600-amperes]. When [I] pulled out my original cranking battery, [I] noticed that it was [rated at] 800-amperes. Six-hundred amperes should be enough to start my boat.
posted 04-14-2009 09:03 PM ET (US)
It is the motor more than the boat which determines the minimum battery rating needed to successfully crank over the engine.
posted 04-16-2009 10:26 PM ET (US)
its a 90 merc saltwater series
posted 04-17-2009 03:09 PM ET (US)
525 Marine Cranking Amps MCA) or 450 Cold Cranking Amps (CCA)for that engine. Additional electrical loads from the boat will require larger batteries.
posted 04-18-2009 01:57 PM ET (US)
If indeed the motor on the boat in question suggests the use of a battery with a rating of 525-MCA, then a battery with a rating of "six hundred amperes", either MCA or CCA, will be sufficient to start the motor.
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