Battery cranking amp?

DragonSlayer · 04-04-2012, 10:32 PM

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?

Ocean Master · 04-05-2012, 11:36 AM

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.

04-04-2012, 10:32 PM	#1
DragonSlayer Senior Member Snapper Join Date: Nov 2007 Location: Beulah Posts: 524	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? __________________ "Nothing beats a try, like a failure."

04-05-2012, 11:36 AM	#2
Ocean Master Senior Member Sailfish Join Date: May 2008 Location: Gulf Breeze Intercoastal Posts: 2,180	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. __________________ "How I Roll" On channel 68 "Wheelchair Accessible Fishing"

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