Hey, no problem. Always fun and helpful on tinboats.In all my years of boating ... maybe 55 or more in a boat running it myself ... I have NEVER seen this topic raised or discussed anywhere!
I've also never read it in print, in any of my manuals, but mostly have had OMC motors. Also NEVER had any issues. With Merc, maybe it's just 'lawyer speak' ...
I do want to recognize #BigCity and give him a big thanks for coming back on here and expanding upon his input, thanks!
But, after looooong consideration I have a new plan. I'm going to install a receiver hitch on the FRONT of my truck like they do at some marinas. Then I'm going to push my boat to the lake next time and see if unobstructed air flow makes a difference in prop speed!