Powersports battery for starting?

[BlkGS]

Anyone using a powersports battery for a starter?

I'm thinking about hooking my two large batteries together in parallel, and using an ACR ro separate those from a small powersports battery. The large bank would be the house batteries for the stereo, and the small battery would hopefully stay charged pretty much all the time.

Thoughts on a setup like this?

 

[Jgorm]

These engines start fine with the little jet ski batteries. Probably only need 100a cca.

 

[swatski]

These engines start fine with the little jet ski batteries. Probably only need 100a cca.

I would agree. But that also makes a dual battery setup in these boats practical with two deep-cycle batteries. Perfectly fine (or more than enough cranking power) plus all the benefits of (two!) deep cycle batteries on board.

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[BlkGS]

An ACR wont overcharge a small battery will it? The bank of 2 larger batteries will obviously need more juice, would the acr boil the small battery trying to charge it while charging the big batteries as well?

 

[BlkGS]

For anyone who ever start along my line of thinking, it turned out to not be worth it.

The thought was the powersports battery would be smaller and thus cheaper. This was where reality dodnt match up to thought. A group 24 battery is MUCH cheaper than a powersports battery, except for maybe a very small 100 CCA battery. So I ended up going with a group 24 cranking battery, and 2x deep cycle group 24s for house use.