What battery is best for my Chrysler 105hp(1978)

[liusigou]

I have just bought a Kirkland Signature Marine Battery(Group Size: 27DC Fitment Code 14 Item# 207220), But my friend said it is not good enough to be used as a starter and driving gas motor. What kind of battery is best for my boat engine.

Thank you.

 

[liusigou]

Also there is another mode Kirkland Signature Marine Battery Group Size: 24DC Fitment Code 15 Item# 207200.

What is difference between 27DC and 24DC? thank you.

 

[Grub54891]

Whats the cca of the battery? I like to get at least a group 31, and the most amps I can get, just so I know it will be there when I need it. If you anchor a lot and use the electronics/stereo, I'd suggest a 2nd battery for running those.
Also a deep cycle is not what you run for the motor, I'd switch it for the electronics, and get a different battery for the motor.

 

[roscoe]

Your group 27 battery can work.
Advice above is good too.

General rules of thumb:
A Starting battery for starting.
DC Deep Cycle battery for accessories and trolling motor.
Dual purpose battery is a compromise that covers both applications.

Group 31 is large, group 27 medium, and group 24 small in physical size.

A group 31 will have the most reserve amps (power), which is handy if you ever have trouble starting your motor and are working on getting it started for 10, 20, or 30 minutes.
Think of "reserve amps" as how many times you can try to get your motor started on a day.

A group 24 starting battery will start you motor if it has 500 CCA, or 6000 MCA. (marine cranking amps)
Its hard to find a battery with less CCA than this.
CCA are measured at 0*F, usually found on a car battery.
MCA are measured at 32*F, because boats are generally used above freezing.

You don't need 900 CCA for your motor.

That being said, larger, if it will physically fit in your battery box, isn't a bad idea, if the price isn't too high.

Be happy, go boating.

 

[liusigou]

Whats the cca of the battery? I like to get at least a group 31, and the most amps I can get, just so I know it will be there when I need it. If you anchor a lot and use the electronics/stereo, I'd suggest a 2nd battery for running those.
Also a deep cycle is not what you run for the motor, I'd switch it for the electronics, and get a different battery for the motor.

The CCA of new battery(Group Size: 27DC ) is 650.