"JAXAshby" wrote in message
...
Incredible, this usenet stuff!!

Just yesterday I learned that a wet exhaust needs an antisiphon valve. [sound
of hand coming sharply to side of head] Why didn't I know THAT? Forever
more,
now I am better informed.

who the hell was the stupid cluck who said a wet exhaust needs an antisiphon
valve?

Maybe it was the ABYC (American Boat and Yacht Council) in its "Standards and
Recommended Practices for Small Craft":

"The waterlift system shall be designed to prevent siphoning through the raw
water pump when the engine is stopped. If this is accomplished through the use
of a siphon break device, it shall be installed at the top of a loop which shall
rise high enough to assure that the high point where the siphon break device is
installed will always be above the water level surrounding the boat. Depending
on the design of the boat, the condition of its loading, and the sea conditions
encountered, this loop may be 30 to 45 cm (12 to 18 inches) above the waterline
at repose. The loop shall be between the water pump outlet and the point of
injection of cooling water into the exhaust system."

Or maybe it was Calder:
"On any engine that is below the waterline, both the water injection line and
the exhaust pipe create the potential for water to siphon back into the exhaust,
fill it and flow into the engine via open exhaust valves. The injection line
must have an effective siphon break."

who the hell were the stupid clucks who agreed with him/her?

Pretty much everyone, except you. Have you been right about anything in the
last few years?

You can backpedal and nitpick that the water injection line is not part of the
direct path of the exhaust gases, but its pretty clear that everyone considers
it part of the exhaust system.