On 2007-12-06 11:47:45 -0500, (Richard
Casady) said:

We've found that even with the fresh water closed off, we have about 5
minutes' run-time at cruise power (about 2200 rpm) before the high-temp
alarm sounds -- quite a bit further than 200 meters. We used that
reserve once about a decade ago, so I know it exists.

What do you mean by fresh water. My [22 ft sterndrive] is cooled by
glycol and has a heat exchanger. If I am floating in salt water, there
is no fresh water involved anywhere.

You're right. I meant to say "raw (salt)" valve. It takes about 5
minutes at moderate power to bring the water recycling in the engine
loop up to to a temp that sounds the alarm.

One thing is certain, unless the pump is managing to circulate coolant
through the engine, it won't last anything like five minutes. The
difference between driving with a broken fan belt, and driving with no
coolant.

True, but I wasn't talking about that, just lack of raw cooling water.
If the fan belt breaks, we have a few other problems.

--
Jere Lull
Tanzer 28 #4 out of Tolchester, MD
Xan's pages: http://web.mac.com/jerelull/iWeb/Xan/
Our BVI trips & tips: http://homepage.mac.com/jerelull/BVI/