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Given that new 4 stroke outboard engines weigh so much, when does the increased weight defeat the ability of a Whaler to stay upright when it is filled with water? For example, let's say we have a classic 16 foot 7 inch Nauset (or newer Montauk) outfitted with a very big modern motor. Have tests been run to see how the boat maintains its flotation as the weight of the motor is increased? This test could apply to any of the Whalers, so I would be interested to know if any data exist concerning this matter? I'm not referring to water simply accumulating in the boat, but I am instead wondering about the potential for a boat to roll over or to be pointed down stern first. Any info out there?