I run one on a 17.9 Wareagle stick steer. In run 2 group 27 battery's on it. I mostly spider rig but do a little long lining and pull cranks. Pulling cranks at 1.5-1.7 on a pretty breeze day I can get about 5 hrs. I have done .7-.8 for 6/7 hrs with no problem. I love the motor. Group 31 battery's would get you more time. If it was me and I did more long lining and crank pulling with trolling motor I would go with the 24. Lower settings to get same speed equals longer battery life equals longer time fishing. So little cost difference between the two since I'm talking 2 battery's anyway I think you would be happier in the long run.