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Jeff

Bruce in Bangkok wrote:
In article ,
says...
In article ,
Larry wrote:

Molesworth wrote in news:ukmole-
:

I have a buzzer on the control panel but it's only for 'ignition on' -
can I add the overheat warning into that circuit?

Of course! Yanmar even has them! No boat should be without overtemp
alarms....but you knew that, right?

Look in your Yanmar manual. That SAME buzzer is supposed to blast away if
the engine overheats! You may just have a bad sensor, or some idiot
removed it because he didn't like to hear it warning him his engine was
overheating....

Which Yanmar do you have that DOESN'T have a high temperature alarm LIGHT?

If it's got a light, you can easily add a loud alarm to it by paralleling
that light with an electronic siren module from any Radio Shack store.

I can't find any Yanmars without overtemp alarm circuits.....
I've now got all the manuals and I'll look at the wiring diags. I've got
the heat exchanger and water pump off.. just the inlet man to remove
before I can lift the head.

Thanks Larry!

--
Molesworth

What model Yanmar do you have? Larry is correct that all of the smaller
Yanmars commonly used in yachts have a warning system - both low oil
pressure and high water temperature. The Yanmar panel has warning lights
and a warning buzzer.

In addition, many Yanmars have several places where you can add a sensor
into the water system. You can have both the buzzer and an analog temp
gauge. I added gauges so I can watch the temp go up as it warms up and
even if the fridge goes on. I get quick feedback when a belt breaks,
since the buzzer doesn't trip until about 190, but the normal temp is
about 170. The only downside is that my wife has decided that 180 is
"too hot" and she starts to throttle back when I'd rather be running
closer to the design RPM.