This is perfectly normal-- as noted, you have no oil pressure until
you start the engine. I suspect your old pressure sensor was bad /
miswired, and that is why you never experienced this before. If you
need to use your sounder or accessories without the engine on, I
suggest you have them rewired-- in fact, it is surprising that they
would be wired to only come on with the key switch.


"Matt" wrote in message ...
But it never did that before... And having it like that i can't have the
depth finder or any accessories on w/o theengine on. (only the radio will
work w/o the key in the ignition).


"Peter Bennett" wrote in message
...
On Wed, 25 Aug 2004 17:09:49 -0400, "Matt"
wrote:

I have a '94 Chaparral with a Mercruiser 5.7L engine. I recently ran
into a
problem when I put my boat in the water, the "Pressure Switch"
(partnumber
87-805605A1 http://www.mercruiserparts.com/images/mer/2689.jpg (in
picture
what is the nut and washer for? the wire just pushes on) rotted and oil
was
spurting out. After replacing the Pressure Switch (oil replaced and
pressure back to normal), WITHOUT having the engine on and when turing
the
key one click I get a continous audio warning, the only way to stop it is
remove the wire from the Pressure Switch. When the engine is running the
oil pressure is normal (see additional question below) and the alarm
doesn't
sound, it only sounds when the engine is off and the key is turned one
click
to turn on the accessories. Any suggestions??

That sounds normal to me - with the engine stopped, you have no oil
pressure, so, when you turn the key on the "low oil pressure" alarm
will sound, and will continue to sound for a few seconds after the
engine starts, until the oil pressure builds up.







--
Peter Bennett VE7CEI
email: peterbb4 (at) interchange.ubc.ca
GPS and NMEA info and programs:
http://vancouver-webpages.com/peter/index.html
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