Originally Posted by Fox hunt
could you use a heavy weight bathroom scale for a bumper pull by putting it under the jack then raising it off the ball until the full weight was on the scale?
Yes and no.
This approach can work, but you will only get the right value if you measure with the tongue at the same height as when towing... which means pulling the tug out of the way and lowering back down. With a single-axle trailer such as the Escape 17', by the time you have raised the coupler enough to that the tug's suspension rises and the coupler just comes off the ball, the extra height will make the measured weight lower than it would be at towing height. Tandem-axle trailers behave in the opposite way.
Also, the reading at the jack will be higher than at the coupler (ball), so it needs to be adjusted (reduced about 10%) to get the right value.