Sizing a proper battery for a motor-cranking amps

[tractorboy]

Im trying to make sure my new battery is big enough/has proper cranking amps for my boat. the old battery does NOT have info on it. I looked EVERYWHERE. Its a willard and a 24 class battery.

I have a gm vortec v6 motor and I want to make sure the battery has enough amps to turn it over at the proper speed. this on now is a 675MCA and a 500CCA.

How can I attempt to find out what this engine needs to start properly. its the starter battery for it obviously.

Thanks

 

[sethjon]

Re: Sizing a proper battery for a motor-cranking amps

You could call any boat shop and ask such an easy question. I suggest at least 700CCA andin this case bigger is better.

 

[Bt Doctur]

Re: Sizing a proper battery for a motor-cranking amps

The MINIMUM requirements from the manual are:375cca/475mca/90Ah

 

[Brewman61]

Re: Sizing a proper battery for a motor-cranking amps

Size and budget being the limiting factors, there is nothing wrong with putting in the highest capacity battery you care to

1- Pay For
2- Wedge into the space