Thanks for the link Steve, but I'm sure you will agree this is the
exception, as to the rule. It also looks homemade.

My reply was aimed more towards Joseph, who stated:

"Sometimes, I really get shocked, reading some of this crap ! and the
responses are just as dumb !!!
People, call some dealers, look at the boats for sale on the web. There are
plenty of inboards, with closed
fresh water systems, using radiators. "

And he finishes his unfounded insults with...

"God Bless, the dumb and the stupid because they know,not what they say."

Aside from the irony, I say to him...show me "plenty of inboards" using
radiators.

--
-Netsock

"It's just about going fast...that's all..."
http://home.insight.rr.com/cgreen/
"Steve Alexanderson"
Idon'tlikegreeneggsandspamIdon'tlikethemsamIamsal
wrote in message ...

http://www.boatered.com/forum/photo_...Album&mid=691&
cid=21675&page=1&pic=Engine.jpg

I don't think so.

There is a known difference between heat exchangers and radiators.

--
-Netsock

"It's just about going fast...that's all..."
http://home.insight.rr.com/cgreen/
"Kevin in San Diego" wrote in message
news:eTGjc.7823$6L3.6703@fed1read05...
Thats a lame argument. Think about it.

KH

"God Bless, the dumb and the stupid because they know,not what they say."

Aside from the irony, I say to him...show me "plenty of inboards" using
radiators.

One of the many reasons that we don't comonly see radiators on inboard boats
is that
a normally sized radiator would fail to sufficiently cool the engine. In an
automotive or truck applicaton, a portion
of the engine cooling is accomplished by air moving across the block and heads
as the vehicle travels down the highway. In some extreme cases, engines with
enough fins attached to sufficiently increase the surface area exposed to the
moving air can be air cooled. No such conditions exist in an engine
room.....(we hope!)

Thats a lame argument. Think about it.

KH

You're right. There's no difference between a cow and a horse, either. Both are
mammals, walk on four legs, eat grass, and are commonly domesticated. Just as
devices designed to transfer heat to the atmosphere and devices designed to
transfer heat from one liquid to another are not different in concept and one
term is properly interchangeable with the other, so it is also a waste of time
to nitpick whether an animal is a cow or a horse. (At least until you want to
go for a ride or get some milk to make butter and cheese).

Paul Schilter paulschilter@comcast,dot,net wrote:
: Since external water used in cooling engines causes a lot of problems, why
: hasn't a car type radiator system with fan ever been used?
: Paul

Your "argument by incorrect assertion" is untrue regarding "external
water used in cooling engines causes a lot of problems".

As others have mentioned, boats use heat exchangers vs. radiators.
What are ya gonna do? Have a fan behind the radiator mounted on the
front of the boat (think how silly that would look) to cool the
radiator at idle speed?

FWIW, my father had a MercCruiser 470 with a heat exchanger. He had
nothing but trouble with it (overheating). I have an old OMC V-6 without
a heat exchanger and have had zero problems with the cooling system
since 1982. There's plentful cool water in the lake for cooling an engine.
Not using it doesn't make much sense (unless the boat is run in a salt
water environment).

b.

That 470 has a small exchanger or a big one. My 470 has the larger exchanger
and runs very cool.
KH

wrote in message
...
Paul Schilter paulschilter@comcast,dot,net wrote:
: Since external water used in cooling engines causes a lot of problems,
why
: hasn't a car type radiator system with fan ever been used?
: Paul

Your "argument by incorrect assertion" is untrue regarding "external
water used in cooling engines causes a lot of problems".

As others have mentioned, boats use heat exchangers vs. radiators.
What are ya gonna do? Have a fan behind the radiator mounted on the
front of the boat (think how silly that would look) to cool the
radiator at idle speed?

FWIW, my father had a MercCruiser 470 with a heat exchanger. He had
nothing but trouble with it (overheating). I have an old OMC V-6 without
a heat exchanger and have had zero problems with the cooling system
since 1982. There's plentful cool water in the lake for cooling an
engine.
Not using it doesn't make much sense (unless the boat is run in a salt
water environment).

b.

(Gould 0738) wrote in message ...
I have a radiator. Its called a heat exchanger.
KH

Technically, a heat exchanger is not a radiator.

A radiator transfers the heat of coolant to the atmosphere. IOW, it "radiates"
heat.

A heat exchanger, as the term is commonly applied, transfers heat between
liquids.

Technically, a "radiator" is not a radiator. A real radiator is what
you see on the floor of an old apartment building with no forced air
flow through it.

A "radiator" in a car transfers the heat of coolant to the atmosphere
by convection and conduction primarily. Radiation hardly plays a
part.

A heat exchanger, as the term is commonly applied, transfers heat
between fluids, not liquids and uses convection and conduction
primarily. Air and water are both fluids. Therefore the "radiator"
in your car and the heat exchanger in your boat are both heat
exchangers.

If this is not immediately obvious, put a peice of cardboard accross
your grille and disable your radiator fan and see how well your
"radiator" works when it must rely only on radiation.

(Gould 0738) wrote in message ...
Thats a lame argument. Think about it.

KH

You're right. There's no difference between a cow and a horse, either. Both are
mammals, walk on four legs, eat grass, and are commonly domesticated. Just as
devices designed to transfer heat to the atmosphere and devices designed to
transfer heat from one liquid to another are not different in concept and one
term is properly interchangeable with the other, so it is also a waste of time
to nitpick whether an animal is a cow or a horse. (At least until you want to
go for a ride or get some milk to make butter and cheese).

I gotta come to KH's defense. As an engineer let me explain that
there is no difference at all between a "radiator" and heat exchanger.
They are both heat exchangers. The physical principles that govern
their operation are identical. One is a water to air heat exchanger
and one is a water to water heat exchanger. They just use different
fluids. This distinction only alters a few of the variables in a
machine designers calculations. The principal means of heat transfer
in both is conduction and convection. Radiation plays such an
insignificant part that it would be ignored by all but the most anal
engineers. It's not the difference between a horse and cow, it's the
difference between an arabian and a quarter horse. Same basic animal,
different applications. If a radiator actually radiated energy away
as the sun radiates energy to earth, why must it be put in front of
the car with air forced through it? www.howstuffworks.com will back
me up on this. Look up "car cooling system" and click on the radiator
link. In the first sentence it calls it a heat exchanger. You can
prove it to yourself on your car by blocking the grille with cardboard
and disabling your radiator fan, get on the highway and watch the
temperature gauge.

Just as
devices designed to transfer heat to the atmosphere and devices designed to
transfer heat from one liquid to another are not different in concept

rebutted with:

One is a water to air heat exchanger
and one is a water to water heat exchanger.

Same statement.

A heat exchanger, as the term is commonly applied, transfers heat between
liquids.



Technically, a "radiator" is not a radiator. A real radiator is what
you see on the floor of an old apartment building with no forced air
flow through it.

"As the term is commonly applied........"

Walk into your nearest auto shop this fall and ask to have your heat exchanger
serviced. You'll get more than a few strange looks.

Send a marine mechaninc down to your boat to change the zincs on your
"radiator"
and the wrench might sense this is a perfect time (and you're the perfect
client)
to recommend servicing the framus and the diogenator as long as he's aboard- it
will only run an extra $200.

If it takes a physics lecture to shore up a theory that "radiators and heat
exchangers are really the same thing" it doesn't, in the real world, address
the issues of this thread.

Those seem to have been:

1. Why don't we see radiators in boats?

schools of thought in response

a. Of course we do. I can show you hundreds of inboards with radiators

b. boats use a liquid to liquid heat exchanger rather than an automotive type
radiator to cool the engine.

c. There is no difference between an automobile radiator and a heat exchanger
on a boat.


If this were a multiple choice exam, I'd go with B. Thanks anyway, though.