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  1. #1
    Al Ebstein's Avatar
    Al Ebstein Guest

    Default "Port engine runs at 75psi whi

    "Port engine runs at 75psi while starboard runs at 115-125psi at WOT. It is either real or I have a sensor or gage problem on starboard engine. This engine was at 75psi before an oil change. Went to 120psi right after the oil change. Port engine at75psi before and after the oil change. Both engines run well, no temp problems no smoke they sound the same too.

    Has anyone ever run into this before? and if so what was found t be the problem."

  2. #2
    Join Date
    Dec 2005
    Vancouver , British Columbia , Canada

    Default take the senders and switch th

    take the senders and switch them from one engine to the other and see what it does. I have found that the senders that Yanmar use have been not all that accurate. Try that and see what happens.
    Guages are usually good. Then not with out faults either. In most cases it is the senders.

  3. #3
    Join Date
    May 2006
    pensacola, fl., u.s.a.

    Default "first, verify that the pressu

    "first, verify that the pressure is real. switch sensors as advised, or use a mechanical O.P. guage. (my preference) most of the larger yanmars have an oil pressure regulator. it may be sticking. normally it would be located in the bottom of the oil cooler. large plug with spring and plunger above. definately get a service manual if you are going to do any maintainance or repairs yourself. the yanmar factory manuals are excellent and very easy to understand."

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