Correct Battery for 85hp Johnson?

[Kaporal]

Hi,

This is my first boat so this might be a silly question.
I have a 1979 Hydra Sport boat, it had 115HP Mercury, but I’m having an 85hp Johnson outboard installed. The Boat did not come with any batteries.
What size of battery should I have for this outboard?
And what size of battery for the 27 thrust trolling motor?

Thank you

 

[JB]

Re: Correct Battery for 85hp Johnson?

I would use the biggest dual purpose battery I could find room for, Kaporal. In the last three fishing boats I have owned I always used Walmart's Marine Maxx dual purpose (The big yellow one). They always did the job for me.