My wife and I just towed a 18 ft. Shawdow Cruiser Fun Finder from ***** Gorda Fl. home to KC. I bought it on ebay. I went Thru small mountains, heavy rain, and fast semi's trying to blow us off the road. Our 2004 Sporty 3.7 with a equalizer hitch and prodigy brake controler never had a problem. The Libby pulled like a Champ. It bogged down on some of the steep hills but not enough to really matter. It ate gas like crazy if I ran 65-70mph. So I kept it at 60-65mph. Welllll most of the time. The trailel weights about 2500lbs. and hitch weight was around 250 lbs. I don't have a larger fan in fact I only heard the fan kick on once. and it was 90 degrees while we were there. Don't let anyone tell you these things can't tow, they can.