On Sat, 19 Feb 2005 21:27:56 -0500, Wayne.B
wrote:

On Sat, 19 Feb 2005 23:58:05 GMT, Short Wave Sportfishing
wrote:

I'm still not convinced that diesels are cheaper to run than the DI
type outboards.

===================================

Usually the real issue is range, not running cost. For the same tank
capacity range is about double with a diesel. Reliabilty/longevity
is usually better with diesel also.

But doesn't range equate to efficiency?

Later,

Tom

Short Wave Sportfishing wrote:
On Sat, 19 Feb 2005 21:27:56 -0500, Wayne.B
wrote:


On Sat, 19 Feb 2005 23:58:05 GMT, Short Wave Sportfishing
wrote:


I'm still not convinced that diesels are cheaper to run than the DI
type outboards.

===================================

Usually the real issue is range, not running cost. For the same tank
capacity range is about double with a diesel. Reliabilty/longevity
is usually better with diesel also.


But doesn't range equate to efficiency?

Indeed.
Both efficiency and wear are related to engine speed. Friction increases
with the square of velocity, so a slow revving diesel will consume less
fuel and last longer at 2000 rpm than an engine running at 5000+ rpm.
The downide is weight, but this is only a problem on small boats.