On Thu, 18 Mar 2004 17:35:57 GMT, "Capt Frank Hopkins"
wrote:
I looked at my tank and the engine discharge flows into the bottom of the
tank through a flow sensor. What the sensor is for I have no clue, but it's
wires go to the main computer box. There is a check valve on the output side
that discharges overboard. (Under swim platform)

I suppose the direction of floe does not matter except for the high loop
(well above waterline) in the discharge hose. I guess the factory did this
to limit any possibility of flooding in case a hose or something else gave
way.

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I believe that Lloyds heater is setup for a fresh water cooled engine
where the engine coolant recirculates through the engine, heat
exchanger and hot water heater in one continuous loop. That's the
most common type in my experience.

What you are describing sounds like a raw water cooled engine to me,
where some of the cooling water is diverted through the water heater
and then discharged. Assuming you have a wet exhaust, the rest of the
cooling water would exit there.