Is it safe to pull one PWC on a double trailer.? I didnt know if the uneven weight distribution would damage the trailer. Also, would it be possible to adjust the bunks so 1 PWC would fit in the middle?
Double trailers are designed to safely tow one or two skis. You will be ok, the weight is still between the wheels regardless of one or two skis on it.
When towing one ski on my old double I ran it in the middle. The 2 center bunks were on a codder pin and swiveled to flip into the middle. Then I would just hook it to both winches.
The trailer ran fine with just one one either side but felt way better over bumps and higher speeds.