Talking to a guy today that has ran numerous boats suggested I install Murphy gauges such as these on my Detroits to warn me if the coolant level drops. Anyone have them on their boat and if so where are they installed, experience with them, etc? Was suggested to me to install to monitor coolant level in tank with an external alarm. Thus if coolant level drops due to leaking or busted hose you would know before engine overheats. Sounds like a good idea and they are only about $100 bucks each. I was thinking of mounting on engine room bulkhead and piping over to the coolant tank. They also provide a visual gauge so you dont have to stick your finger in the radiator cap to check levels as you do on mine which are inches from the ER ceiling
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Thread: Murphy Swichgauge
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06-22-2018 10:35 PM #1
Murphy Swichgauge
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06-24-2018 10:09 AM #2Senior Member
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- Apr 2008
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Re: Murphy Swichgauge
They are plumbed in at tar expansion tank top line above coolant level bottom line five or so inches below coolant level. Then wired to the warning light and alarm.
GLORY Hull # 365
Northport, NY
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06-24-2018 10:51 AM #3
Re: Murphy Swichgauge
Is there an existing port that is normally used or do they have to be tapped? I have two ports for anodes was thinking of somehow using one of them
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06-24-2018 08:18 PM #4Senior Member
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- Apr 2008
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Re: Murphy Swichgauge
You will likely be drilling and taping.
GLORY Hull # 365
Northport, NY
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06-24-2018 10:27 PM #5
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06-24-2018 11:23 PM #6
Re: Murphy Swichgauge
After my recent overheating escapade, I am installing them after mechanic recommended. I'd be interested in following your install
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06-24-2018 11:42 PM #7
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06-25-2018 12:07 AM #8Registered Member
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- Jul 2016
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- 34
Re: Murphy Swichgauge
I recently found out that the reason for my port engine overheating was a broken line. Wonder if these could be installed on CAT 3208 engines. Anyone know?
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06-25-2018 12:08 AM #9Registered Member
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- Jul 2016
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- 34
Re: Murphy Swichgauge
I should have specified a broken coolant hose leading to low coolant level.
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06-25-2018 09:16 AM #10