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Old 04-04-2012, 10:32 PM   #1
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Question Battery cranking amp?

I need a new battery for my boat. It's a Mako 171 with a 135 Johnson 2 stroke. My battery now is dead, I'm adding a 2nd batt and am using a "Perko" switch to hook them in. My question is how to determine my CCA requirement? I found some exide batts with 500 CCA, is that enough?
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Old 04-05-2012, 11:36 AM   #2
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You first need to find the minimum cranking amps required by the engine. For a starting batttery the 500 will be large enough. You will need more reserve amps for the other battery.
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