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Old 05-11-2014, 11:15   #1
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Join Date: Apr 2009
Location: Cruising the Caribbean
Boat: Morgan 461
Posts: 96
Cranking battery size for Perkins 4.236

Hi all,

My boat has always had a single battery bank, both for house and starting. I want to change that and have a dedicated starter battery, but can't find a document from Perkins that specifies the proper CCA I need from the battery.

I've measured 400 amps when cranking. Is it safe to assume that 600 CCA battery will be enough?

Again, it's a Perkins 4.236, 85 HP.

Thanks!
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Old 05-11-2014, 12:32   #2
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Join Date: May 2011
Location: PDX
Boat: Gulfstar 50
Posts: 896
Re: Cranking battery size for Perkins 4.236

I use a west marine AGM-55 to start my 4.236.
  • CCA: 775
  • MCA: 955

WEST MARINE High Cranking Power AGM Battery | West Marine

Never any problem turning it over.
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Old 06-11-2014, 07:22   #3
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Re: Cranking battery size for Perkins 4.236

Thanks, evm. I bought a 750 CCA.
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