Sue, For awhile I pulled a 13'
Burro with a Dodge Raider (4 cyl., 2.1 L). It pulled it O.K., but I really needed more oomph going over the Smoky Mountains. (On the long hills I had to use the truck lane...and the truckers were not happy with my speed!) I have switched to a Jeep Cherokee straight 6, 4L and it holds its speed on any hill. You might do O.K. on flat land, but on the big hills, you'd probably want more power. :)