Hi Jerry, The answer to your question is NO. N-O, No! Don't go bouncing down the road with an outboard mounted on the stern of the boat. That is asking for trouble. Let the powerboat people with their big motors enjoy all that fun! The major problem is that the boat's stern and the motor mount are not designed to handle shock loads.Shock loads would be applied by a 55 lb weight hanging on a lever arm of xx inches as your trailer - which most likely has cast iron springs (i.e., much too stiff) - hits bumps in the road; pot holes; debris; goes over curbs, etc. The trailer will pivot on the hitch: the trailer wheels hitting the bump will cause the stern to act like a slingshot. The resulting "g" forces have to be countered by the boat's stern. If it is a very mild bump, then the motor mount / stern may be subjected to 2 g. 2g would equal 110 lbs. if the bump becomes more severe; then you could be looking at 3 g or 4 g: then we are talking about the motor mount and the stern structure holding forces of 165 lbs, and 220 lbs, or higher, depending on the severity of the bump. That is not a normal boat stern design operating condition, and no stern is designed to absorb such shock loading. You are running a very expensive destructive test on the stern. Do you really want to see your 55 lbs of outboard attempt solo flying lessons on a heavily traveled Interstate, while taking a good piece of the stern with it? Connie M15 #400 LEPPO