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Old 05-15-2019, 07:44 AM   #1
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Default 5.7 v8 No I mag

5.7 v8 mpi mag. Can anyone help with a part number for a new oil pressure sensor.

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Old 05-15-2019, 11:19 AM   #2
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Do you have the engine serial number or at least the year? To be clear you are asking about the sender for the helm gauge, correct?
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Old 05-17-2019, 06:32 AM   #3
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I'm not able to get over to the boat unti next week to get the serial number but I can tell you it's a 2006
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Old 05-17-2019, 10:30 AM   #4
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You have same sender as I do, p/n 18-5899 (Sierra), or 8M0068784 (Mercury).
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Old 06-02-2019, 08:16 AM   #5
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I was down on the boat yesterday and i wasn't able to locate the oil pressure sensor. Any ideas?
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Old 06-02-2019, 11:16 AM   #6
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Quote:
Originally Posted by Simonhall1282 View Post
I was down on the boat yesterday and i wasn't able to locate the oil pressure sensor. Any ideas?
Still not sure which one you are looking for. The helm gauge sender should be mounted near the distributor on the top rear of the engine. The alarm and fuel pump senders are located on the port side of the block just above the oil filter or where the remote oil filter adapter connects to the block, standard GM location.
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Old 06-02-2019, 12:18 PM   #7
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I will go have another look today. The helm gauge sensor is what I'm looking for. Thanks for your help Mike
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Old 06-02-2019, 12:49 PM   #8
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Itís a bell shaped sensor like in this link.

https://www.amazon.com/Pressure-Send...a-574196842012
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Old 06-02-2019, 02:07 PM   #9
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Ok I've replaced the sensor and the gauge is still reading high pressure. About 50psi on idle and almost 80psi with max revs.
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Old 06-02-2019, 02:08 PM   #10
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Could this be caused by a faulty gauge?
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