On Sun, 23 May 2004 09:44:42 +1000, "K. Smith"
wrote:


Why?? Fuel or gas leaks?? (hope not)

None.........

Once the motor is running at some revs it's sucking in more air than
any blower is likely to move; indeed leaving the blower on at cruise is
robbing the motor of free air supply or at least trying to.

I was under the impression that air was circulated while running, via
an intake/suction effect through the bilge vents. I don't see how the
engines running at high rev's could draw air into the bilge, as
there's no fan or other means of generating suction.

Assuming your engine room is reasonably well sealed, that could be part
of the problem for the blowers??? struggling against the inrushing air
trying to feed the motor??

I don't run the blowers at cruise, as the venturi effect is sufficient
to keep the bilge vented, but it's my "operating procedure," if you
will, to operate them while the generator is running, before start-up
of course, and while idling.

I also have a fume detector in the bilge which is run 100% of the time
I'm on the boat.