It's not a Terrova issue Major, it's a battery issue. Minn Kota is correct, it will pull Sat around the lake at 2.5mph "all day long" as long as he has the battery power for the job. Two golf cart batteries may do it but I'm sure four batteries connected parallel and then in a series would last all day. My Group 27 Trojans will pull me at 1.7 for 5 hours so another pair could net him an 8 hour fishing day I would think. Do you think two Group 31's could do it? I have heard you mention you have had very good luck with your 31's.Thumbs Up