""""This engine produces about 80 HP. Not a Diamond Series Cummins. Do you really think it will rip the marina apart? Has your marina ever weathered a storm? Tie some knots? Put some extra ropes on it? Put the bow against something?""""
If I gave offence I apologize. That was not my intention, rather to get the O.P. attention. I tried later, upon rethinking my comment, to edit but I was too late.
No, I do not think this action will rip the marina apart. Yes, put extra lines on it but some times in spite of the best intentions things go awry.
And I did say take someone with you to run the boat. That's what I do, my wife runs the boat while I check things.