On Sat, 27 Dec 2008 11:35:52 -0800 (PST), Tim
wrote:

i think they're operating cost comparison's are W-A-A-A-Y overboard.
("Overboard" pardon the pun)

For one thing, they're using gasoline and diesel at the same purchase
costs....

Yes but that's the least of it in my opinion. It is difficult, if
not impossible to build a reliable, high output, lightweight diesel.
If it were possible lots of other people would have done it by now.
High power to weight ratio is what outboards excel at - diesels, not
so much.