So, we're talking about $13,000 for the drive system, plus about $20k for a Yanmar 440?

20K for a Yanmar 440? is that right? sounds cheap.
And will it fit? thats an inline 6? could be too long?

Apparently the measurements were taken and it will fit.

From this ad the 440 looks like $31k.
http://www.simplicity-marine.com/yanmar.htm

How about these?
They only show up to the 310HP with an outdrive on line, but the 370HP is basically the same engine. I'm sure it would couple up.
I would bet the Y2K would run well over 60mph with the 310 and near 70mph with the 370.
http://www.volvo.com/volvopenta/na/e...ndrive/d6-310/

I imagine if the boat would run 70 then it would cruise all day at 60?

If the 440 is 31k then with the drive we're talking 44k. For 50 omthing you have the whole boat and 496.

The question is, what are you trying to benefit by going to diesel?

cost benefit, but over the short run there is none. if you kept the boat for 10 years, maybe, or if you wanted to sell it, maybe.

Ok, Imagine a single diesel in a 34'. I read about one in POwerboat, cant remember what brand it was though.

I hope it would have a bow thruster too....

I know i wouldn't want to be docking that thing every day.