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Old 06-26-2020, 10:21 AM   #1
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Temperature sensor

Can someone tell me where the water temperature sensor is located on a ‘77 MerCruiser 454? Thanks
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Old 06-26-2020, 12:01 PM   #2
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A very long life for a gasser. I had the same engine, a rebuild but eventually it had to be replaced. Has your engine been fresh water only? There are three Virmilion's listed, Ohio, Michigan and Illinois.
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Old 06-26-2020, 12:31 PM   #3
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I’m 99% certain it’s been fresh water the whole time. I think I’m the 4th or 5th owner. At one time it was registered in Kentucky but I do t think it’s never seen salt water.
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Old 06-26-2020, 05:07 PM   #4
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It's either on the side of the cylinder head near the spark plugs, or the front of the intake manifold near the thermostat.
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Old 06-27-2020, 11:49 AM   #5
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I know there's a lot of knowledgeable folks on here and I do appreciate the feedback but isn't there anyone out there that knows for sure where this temperature sensor goes? It's important for me to locate the old ones and replace them.
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Old 06-27-2020, 12:42 PM   #6
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Didn't Ski answer this?

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Old 06-27-2020, 01:01 PM   #7
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Quote:
Originally Posted by Lou_tribal View Post
Didn't Ski answer this?

L
Yes, he did and I appreciate it. I was just trying to get a little more definitive answer. I'm trying to not go digging around and taking too much apart to find it. Thank you.
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