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Old 06-04-2015, 05:05 PM   #21
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You can purchase a thermal switch disk in any temp range for $10 and hold it on the exhaust elbow with a hose clamp then wire it into your existing alarm system.
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Old 06-05-2015, 12:07 AM   #22
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Originally Posted by Larry M View Post
We have an older Aqualarm Five System Monitoring Kit. I've never had the exhaust temperature go off but we did lose our water flow and the sensor did it's job. We shut the engine down immediately. The response was quick enough that we did not damage the impellor. All our sensors are tied to a bell that gets your attention on or off the boat. I think they are a good idea.

There are other good systems out there. Maybe someone can suggest an other manufacturer.

20001 Five Systems Monitoring Kit Single [] - $349.00 : AQUALARM, Warning Systems For Land And Sea

I am surprised the exhaust temp alarm didn't go off. You must have been quick on the shut down!
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Old 06-05-2015, 12:22 AM   #23
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I've been thinking of installing an alarm system. Aqualarm make good ones and they've been doing it for more than thirty years.

Yes they do make some sensors in both normally open and normally closed versions. I think Bertram as well as Hatteras used the normally closed system.
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Old 06-05-2015, 07:05 AM   #24
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Originally Posted by Arcticspud View Post
I am surprised the exhaust temp alarm didn't go off. You must have been quick on the shut down!
Not really...I have had 3 instances where the water flow alarm went off and not even a degree change in engine temp...I realize that's not exhaust temp but.......

The Aqua alarm goes off at a reduced water flow..not necessarily a complete blockage....a Lehman at reduced power probably doesn't need a huge flow to keep from overheating or setting g off the exhaust alarm...depending what it is set at.
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Old 06-05-2015, 07:38 AM   #25
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Chris, do you have a source for those digital temp indicators.

They're made by CruzPro (they have a website) and I bought 'em on-line from downwindmarine.com.

My thought was that increasing engine temps can come from several sources (i.e., not just raw water flow).

FWIW, I'm intending to continue swapping out existing analog gauges to their products, as time and budget allows. That way I can set alarms on oil pressure, too. Also, looks like their fuel tank gauges can give me a better idea of fuel consumption -- compared to just guessing, using engine performance curves -- without the expense (and installation) of a real Floscan system.

It turns out that CruzPro's built-in LED backlighting means I can remove a whole bunch of extra circuit wiring -- for dash lights -- under the helm, too.

-Chris
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Old 06-05-2015, 07:47 AM   #26
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I've got the Cruze Pro tank level gauges.
I installed it 10 years ago. Its singularly one of the best things I added to my boat. Their products are great.
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Old 06-05-2015, 07:59 AM   #27
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Quote:
Originally Posted by meridian View Post
You can purchase a thermal switch disk in any temp range for $10 and hold it on the exhaust elbow with a hose clamp then wire it into your existing alarm system.
You can tie this into your existing temperature sensor and alarm on the engine.

Fan Limit Switch Therm O Disc 60T12 610064 | eBay
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