That 45 motor guide on a tracker that size is not going to run very long on high speed. They are not a very efficient motor and you probably have a group 27 battery which won't hold up long under those conditions. At the very least you need a group 31 deep cycle battery and you will still be lucky to get 3-4 good hr's run time on high. Get you a couple of 5 gal buckets and rig them up and pull with big motor. Or spend the money and get a terrova.