Doing the best you can includes being responsible enough to respond to concerns.
If somebody (Ham) says "Wrench sold me a motor with a bad water pump, and assured me that it was fresh and working fine. He bold-faced lied to me". I would at least say that I didn't bold face lie, what actually happened was that I aquired the motor with a fresh water pump, it was test run before I ever took possession of it and it was pumping water just fine. Just before delivering it to him I realized the tiller arm bushings were sloppy, so I quickly replaced them and test ran it one more time. It fired right up, shifted fine, and was pumping water, so I put fresh gear lube in it and dropped it off to his buddy in Springfield. I made a whopping 60.00 on the deal. Something went wrong between then and a month later....and Ham still hates me to this day over it and has shared his side of the story plenty. Maybe somebody started it out of the water before taking a trip out of state....I dunno, but that's what I suspect. I've been open for a debate about it to anyone who cared to discuss it, and there has been about 4 of them.
That's the right way to handle bad press, not just pretending to ignore it, declaring him a Wack Job, pleading the 5th, and waiting out the statute of limitations.