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  1. #1

    Default Low oil pressure at idle on 6.2

    I purchased 2 brand new, not rebuilt, 6.2 long blocks with oil pan and water pumps. They were put in a 2001 Sea Ray 340 with V drives. I am using the correct 25w 40 mercruiser oil. Correct amount of oil in both engines and new AC oil filters. I have installed 0 to 60 psi mechanical gauges, that read in 1 pound increments, on both engines. I ran both engines at the recommended break in rpm’s and times. I have installed new oil pressure sending units and low oil pressure alarm sending units on both engines. Both engines read identical temperatures and oil pressure temperatures throughout the rpm range, double checked with an infrared temp meter. I am getting the following oil pressure readings.
    Cold start - 48 psi port / 38 psi starboard
    1 hour at 2200 rpm – 44 psi port / 35 psi starboard
    At idle after 1 hour at 2200 rpm – 44 psi port / 9 psi starboard
    1 hour at 3,800 rpm – 42 psi port / 30 psi starboard
    At idle after 1 hour at 3,800 rpm 25 psi port / 4-5 psi starboard with low oil pressure alarm on.
    I am being told by the company I bought the engines from that this is normal and at idle they only need 2 psi. Even though the low oil pressure alarm is on. Need some advice on what is going on with this starboard engine.

  2. #2

    Default Re: Low oil pressure at idle on 6.2

    Hello, did you find the problem/solution? I’m having same problem

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