"DSK" wrote in message
...



This
particular boat was a planing boat, and the increased efficiency of the
diesels allowed the boat to carry somewhat less fuel, making it lighter
& easier to plane,

In general, a diesel engine weighs a lot more than a gas engine of the same
horsepower. I would think that you would have to be talking about some very
large fuel tanks to have the fuel weight significantly counteract the engine
weight.

Rod