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What is Normal marine power 5.7 340hp oil pressure

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    What is Normal marine power 5.7 340hp oil pressure

    I have a 2007 24ve with the 340hp 5.7 marine power motor . What is normal oil pressure on this motor ?
    I went out this weekend and its idling oil pressure is 45psi to 50psi
    i didn't think it was this high at idle before
    and I didn't run it hard but at like 3500 to 4000 rmp it was climbing 70 psi range ,is this normal ?
    And what is the normal oil pressure for this motor if its not
    Thank you

    #2
    If memory serves my 5.7 idled around 25-30 when warm and ran 60-65 high rpm also warm.

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      #3
      My 07 is about 25 to 35 at idle but i do not think it is that high at upper rpm. I will check next time out.
      Wake Up or Stay On Shore!

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        #4
        General rule Ive always heard in the race world is 10 psi/1000 RPM increase. So while your readings seem a bit off at the guage,as they scale from idle to 3500-4k it seems about to right. Wondering if at one point the sender got replaced with the wrong ohm range sender

        Per MP pre 2011 owners manual below 20-60psi at 2k RPM is acceptable
        Attached Files
        Last edited by freeheel4life; 08-20-2020, 04:29 AM.

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