On Fri, 15 Jun 2007 12:08:15 -0400, Gene Kearns
wrote:

On Fri, 15 Jun 2007 10:07:19 GMT, Short Wave Sportfishing penned the
following well considered thoughts to the readers of rec.boats:

On Thu, 14 Jun 2007 19:48:55 -0700, -rick- wrote:

Short Wave Sportfishing wrote:

Four stroke technology is inferior to two stroke technology. I have
always been a proponent of two stroke technology - in particular with
diesel engines which dollar for dollar are more efficient that four
stroke diesels.

I'm for the six-stroke...

http://www.damninteresting.com/?p=467

Cool - although I fail to see the advantage.

If I interpret correctly.....

It is using water to extract the wasted heat energy that the cooling
system would throw away.... it isn't really water injection to enhance
fuel burning efficiency, like on an aircraft. It is really a
combination gasoline/steam engine.

I see issues with shock cooling and corrosion.

Cool, nevertheless....

I understand the concept - I'm just having trouble understanding how
this becomes more efficient than a four stroke.

You still have to carry the water which is heavy and I imagine it uses
a fair amount of water to create enough oommph to move the piston on
the fifth stroke.

Interesting none the less.