[C320-list] Electrical Engine Alarm problem

[Irving Grunes]

Bruce,
I first have assume that you can start and run the engine except without the
alarm going off.
When the engine is running, check to see if the Oil Pressure gage is
registering, because that would be an indication that the Oil Pressure
sensor is working.

If I remember correctly the alarm sounds under only two conditions, Low Oil
Pressure and High Water Temp.
The alarm is wired across the LOP and HWT lights

When you turn the key on, the LOP light should go on immediately. If it
lights, then there must be a bad connection between the light and the alarm,
because you said the alarm works when you ground it.

If the LOP light does not go on, then find the LOP sensor on the engine and
short it to ground at the engine.

If the LOP does not light,  then there is a problem with the wireing back to
engine box.  Most likely at the terminal board in the engine box.
If  the LOP light does go on and the alarm does sound when you short the
sensor, then the sensor is bad and needs to be replaced.

At the same time you are messing around, short the HWT sensor to make sure
it's light goes on and the alarm should sound as well

Irv Grunes #851

On Thu, Sep 25, 2008 at 8:31 AM, Larry Frank <WindSwept at stx.rr.com> wrote:

> Maybe a bad oil pressure sender?
>
> Since I have the Westerbeke, I do not know how your Yanmar works.  I had a
> similar problem when I broke the electrical leads off the oil pressure
> sender on WindSwept.
>
> Larry
> #246
>
> -----Original Message-----
> From: c320-list-bounces at lists.catalina320.com
> [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of Bruce
> Stanley
> Sent: Thursday, September 25, 2008 1:36 AM
> To: C320-List
> Subject: [C320-list] Electrical Engine Alarm problem
>
> Electrical Engine Alarm problem.
>
> Alarm works,
> but not properly...
> -----------------------------
> NO ALARM SOUND when Key is in ON position.
> NO ALARM SOUND when engine is running.
> -----------------------------
> ALARM SOUNDS if the Electrical LEAD to Engine is MOVED from DESIGNATED Male
> connection on engine
>         TO any GROUND POINT ON THE engine, AND the Key is on.
> ALARM continues to SOUND if (AS ABOVE) and Engine is ON.
> ------------------------------
>
> obviously the Alarm works, but not as it should.
> -----------------------------
>
> any suggestions appreciated
>
> Bruce Stanley / C320 #1084/Sydney
>
>
>