Listed here are the minimum "Cold Cranking Amperage" battery Ratings to be used on most marine engines in these Cubic Inch brackets.

** (See note below.)

In this case bigger is usually better.
Also, a new measurement called "reserve cranking" came out and it is exactly as it sounds and worth getting the highest reserve available.

*EFI models Require a 650 CCA or 150 Ah Rating

DIESEL ENGINE CHART

 

The temperature chart below shows how temperature affects a battery and the load an engine puts on the battery when cranking.

 

When installing and/or replacing battery cables, the guides below should help when selecting how heavy a battery cable to use.

 

Temperature not only effects the output of the battery but it also effects the batteries life span. Batteries kept cold and dry during extended storage, slows down the chemical reaction. This extends the life-span of the battery a bit. Something to think about during storage time…..

 

 

 

** When selecting a battery it is important to know that "Deep-Cycle" batteries are not designed to crank an inboard engine or a large outboard. Using one can cause early battery failure. As of a few years ago, they came out with several types of dual-purpose batteries. (Cranking/"Deep Cycle" ) For the most part, these have a longer storage life span. It was designed for those who don't use the boat much or  the boat sits unattended with auto-pumps and the like on, all the time. If you are purchasing one of these, it is recommended to increase the cold cranking size of the battery as compared to the battery chart at the top of the page.

 

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