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Old 25-04-2013, 02:31   #1
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Audible Overheat Alarm For Engine

Can anyone advise on how to set up a very loud overheat alarm for our main engine - a Ford FSD 425. We have an overheat on the exhaust hose but this only shows a visual light and can be easily overlooked. Maybe something wired into the engine block? We recently had an overheat situation when a hose came off and no cooling water was getting to the engine and just by luck we noticed it before it did harm
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Old 25-04-2013, 03:59   #2
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Re: audible overheat alarm for engine

Greetings and welcome aboard the CF, Pam.

Use the Cole Hersee M-40177BP Marine Engine Warning Kit
http://www.colehersee.com/home/item/cat/232/M-40177BP/
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Old 25-04-2013, 04:03   #3
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Re: audible overheat alarm for engine

Not sure how much current your engine overheat switch can handle? let assume it can handle 15ma to run this piezo. $4 and half an hour labour
Mini Piezo Buzzer 3-16V - Jaycar Electronics
just wire it in parallel to your indicator light.
indicator light powers up, piezo also powers up.

Im going to do this same installation to a yacht tomorrow, i will let you know how it goes.

If anyone has better ideas let them fly!
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Old 25-04-2013, 06:33   #4
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Re: Audible Overheat Alarm For Engine

Many thanks for the info - I will wait for your advice on wiring. Very reasonable price too.
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