"4. The trailer length is a little short for this 16'7" boat so the tongue weight is heavier than normal."
That doesn't make any sense. It should be just the opposite.
Humminbird Helix 12 CHIRP SI, 1198c SI, 1198c SI, ONIX 10 SI NT, Helix 7 CHIRP SI GPS G2, 360, RC-1