High Oil Pressure on Mercruiser

sessasails

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Jul 12, 2018
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Was cruising along and warning buzzer sounded off. The Smartgauge and dash gauge said oil pressure was 60#. What should the oil pressure be on a 240 Sundeck with a 5.0 Bravo II (OW344212)? At idle, showing about 30# but at almost 4000 rpm, showing almost 60# with a newer filter and oil change (quicksilver filter). Any idea of cause?
 

Rick Stephens

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Aug 13, 2013
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Both my year 2000 7.4L powered welding truck and my '07 8.1L pickup run about that with over 100,000 miles and 5-30 Mobile 1 in em. Doesn't sound like a problem to me. My rebuilt '93 4.3L V6 is just under that.
 

Bondo

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What should the oil pressure be

Ayuh,..... Welcome Aboard,....... 10 psi per 1000 rpms is the accepted minimum,..... No problem where yer at,.....
 

alldodge

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Was cruising along and warning buzzer sounded off. The Smartgauge and dash gauge said oil pressure was 60#. What should the oil pressure be on a 240 Sundeck with a 5.0 Bravo II (OW344212)? At idle, showing about 30# but at almost 4000 rpm, showing almost 60# with a newer filter and oil change (quicksilver filter). Any idea of cause?

You sure smartcraft was showing the error??

Now if it showed 50.7 then there is a sensor problem

Also was it a constant alarm or 2 beeps?
 

sessasails

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Jul 12, 2018
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Constant beep. The smartgauge would show up to 60.2 with no alarm, but I did not want to push it again to see exactly where the alarm would sound.
 

alldodge

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Don't think its oil pressure

Need to go thru the SC gauge and see what's causing the beep

Here is what causes beeps

Fault Codes 555.jpg
 

QBhoy

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Mar 10, 2016
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Hi. What’s the cooling temp showing ? Other than that being low...I’d suggest the alarm is coming from a different source...like the rpm limiter...low gear oil...
 
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