115 Battery Question

[Garpoe05]

I have a 2005 Yamaha 115. I had it hooked to an Interstate battery, 800 cold cranking amps and it has about had it. I was in Sears today and they had Diehard marine batteries. But they only had a 560 CCA battery. I live in South Florida, where it is pretty much always warm. Is there any issues with going with this lower CCA battery? I noticed in my owner's manual for the 115 that the minimum CCA is rated at 380. But it says the minimum reserve is 124 minutes, and the minimum reserve on the Diehard is 85 minutes. The Diehards are on sale this week so was trying to get a good deal, but didn't know if it would matter.
Thanks,
GP

[boats.net]

If this is a 2 stroke 115 then that battery will start it and run it ok, but would depend on how much current other equipment in boat will draw.