Re: Do you trailer your small boat with the motor on?
I have had 2 boats (12' Valco/9.8 Johnson and a 16' Lund/15hp Suzuki) and have always trailered them with the motor on the transom. I have never had any issues because of this. On both boat/trailer set ups, the bunks ran all the way to the back of the boat and supported the transom. I also always trailer with my motor in the down position (there is always good ground clearance). With the motor down, I think this puts the least leveraged stress on the transom.
In all, I think it's an ok thing to do as long as the motor isn't bouncing around and putting undue stress on the transom.