Sufficient ?? .... probably not !! Not IMHO, anyway. You probably want a couple series 29 or 31 (depending on space). My Everstart Maxx has 114 amp hours, and my Everstart series 29 has 122 amp hours ... and I'm only running a 12v 42lb thrust trolling motor.

If it were me, I'd take them back ... then get 2 series 29 batteries of the same or close to the same mfg date. Be aware ... the Everstart series 29 battery weighs 60lbs. And they won't fit a series 27 battery tray.