What happens if you tow a trailer with excessive tongue weight?

I have two major trips planned with my Lees-ure Lite. I went on an overnight trip a few days ago to work out bugs. After many hours I have them all corrected except excessive tongue weight. Despite my best efforts I could not get it down below 47 pounds, and specs say 40 pounds is maximum. I admit I am skeptical about the tongue weight of the empty trailer (18) and will be testing that after the seam sealer dries.

Let me know your thoughts.

Thanks.