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Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxt!houxm!ihnp4!amdcad!mike
From: mike@amdcad.UUCP (Mike Parker)
Newsgroups: net.rec.boat
Subject: Re: Outboard water pressure
Message-ID: <1368@amdcad.UUCP>
Date: Fri, 17-May-85 16:04:01 EDT
Article-I.D.: amdcad.1368
Posted: Fri May 17 16:04:01 1985
Date-Received: Sat, 18-May-85 01:45:56 EDT
References: <53@biomed.UUCP>
Organization: AMDCAD, Sunnyvale, CA
Lines: 28
Summary: other causes of impeller death

In article <53@biomed.UUCP>, lagasse@biomed.UUCP (Robert C. Lagasse) writes:
> Outboard engines use a rubber impeller as a cooling water pump and from what
> I have been told by several outboard mechanics is that this part will burn
> up and turn into little rubber bands in seconds if the engine is not
> immersed in water while running.  Once this part fails, the engine will

If you have an outboard ( or fro that matter inboard ) engine that has
been in storage for a period of years. In my case a brand new Volvo
marine engine that had set for 2 years. The impeller may have died
of "dry rot". For what they cost it help to have a spare around the
first time you start such an engine.


>   I have installed a fluid pressure switch at the engine by cutting the hose
> that runs to the "water indicator" and inserting a tee connector to feed the
> switch.  A pair of wires run up to the dashboard where a piezo buzzer is
> mounted.  The buzzer sounds for a few seconds on start-up until the water
> pressure rises which clicks the switch contacts open.  The power is tapped
> from the "ignition on" + lead so all is quiet when the key is off.  This
> also lets me know when I have left the key on without the engine running.
> Any comments ??????
> Bob Lagasse Biomed Eng. MGH

Nice idea, wish it was mine. The volvo has an analog temperature 
guage but you don't see the problem until you're miles from home
and hot.

Mike