<John wrote in part: I feel better knowing that our engine is solidly bolted to the engine bed. I know these mounts are designed (or supposed to be) to survive a roll-over.> I'm not aware of many boats, Nordhavns included, who bolt their engine directly to the beds anymore. I may be wrong but none that I've seen recently. I believe that the mounts we have will hold the 2800 lbs of engine in an inverted position.heck that's only 700 lbs each ;-) Now Swan Song rolled over and "hanging the engine" would have some other issues that might be more insurmountable. The beer in the fridge would become foamy, the heads would dump the water all over and I'd have to clean up the pilothouse seats if we survived. Doubtful that we would. I think the 99.9999% of the time that the reduced vibration and noise coupled to the structure reduces the fatigue factor on the crew is a very good trade off. Low frequency noise/vibrations over a long time are known to increase fatigue and cause the level of mental alertness to become reduced. Better to be alert and fit, IMO rather than worry about that roll and if the engine will "hang". With a dry stack I can hear the engine and know if it's a few rpm off or has any other unusual things happening. As always YMMV.. Dave & Nancy Swan Song Roughwater 58