"Edward Greeley" wrote..
Does anyone know of any "real world" reasons why automotive-type,
corrugated flexible hoses should not be used to replace unavailable or
ridiculously expensive OEM molded hoses in marine engine cooling
applications

Nope. None at all... well maybe a small one.


Glenn Ashmore wrote:
The fresh water side probably doesn't make much difference other than the
reduced flow from the corrigations. On the raw water side it makes a lot of
difference because automobiles don't normaly sink when a rotten hose breaks.

Trivial detail!

There is a big difference between series 250 water hose and regular
automotive hose. Like almost twice the wall thickness and much more
reinforcing.

I bet boat hoses see a wider variation in temps & pressures, too. It's
quite possible to pay high prices for fancy labelled "marine" equipment
that's really not much better than K-mart brands, but OTOH if you learn
a little bit about what the specs mean, and various service ratings, you
can shop for industrial parts with the highest rating and still save a
little money. IMHO you're also better off, but then I believe that
knowledge is a good thing for it's own sake

Regards
Doug King