On Fri, 29 Feb 2008 17:17:03 GMT, "Dennis Pogson"
wrote:

Why aren't boats tested
annually? They burn much more fuel than a car. In fact, boat exhaust
has hurt people on the water:

More fuel than a car?Per hour but not per mile or per year. Any kind
of combusion product can hurt people. You can't breathe pure nitrogen,
which is what perfect combustion will leave for an atmosphere.

Casady