Deep cycle?

[SkunkBoat]

It'll be fine. Better actually. Deep cycles are better for running lots of electronics, lights & pumps & motors for hours. They are supposed to be discharged and charged over and over again.

Starting batteries are designed to shoot their load in order to crank a big old carbeurated Mercury five times in the hopes that it starts. They really are not supposed to run electric loads for hours.

Your 4 stroke is going to start in a half second every time so you don't need a dedicated starting battery.

The compromise is a Dual Purpose (DP) battery. I ran a single group 27 DP for the 18 years I had the V20. No battery switch, never put it on a charger except in the spring right before hooking it up. Needed a new one every 5 years... like clockwork

and I was also going to say that 1000cca sounds like a lot for a 24 DC