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    Oil Pressure Below Mercruiser Limits Per Manual

    So I put in 25W40 and it works much better. The engine was overhauled by Blain's engines in Dallas. They have a great reputation fwiw.
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    Oil Pressure Below Mercruiser Limits Per Manual

    Yes the problem is fixed. New Block and all new bearings. No oil loss that I can see. Only about 20 minutes on the engine so far.
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    Oil Pressure Below Mercruiser Limits Per Manual

    I can try that. I didn't see anything but 40W in the manual but now I see it clear as day.
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    Oil Pressure Below Mercruiser Limits Per Manual

    Sorry forgot to say that Yes I did verify it with a mechanical guage.
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    1993 MerCruiser 4.3L V6 RAN OUT OF OIL

    Its possible the high oil pressure pushed out the RTV on that manifold. It was not uncommon for that engine to be at 80psi on first start up. Interestingly after we got another overhaul it is now on the low oil pressure side. We had to get a new block so who knows. I started another thread on...
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    Oil Pressure Below Mercruiser Limits Per Manual

    Hi Braintrust, Just overhauled my engine again after it ran out of oil which was covered in another thread. Now with a fresh overhaul and new oil pump I am getting low(er) oil pressure than expected. Mercruiser says anything below 30psi at 2,000 rpm is too low. I am getting around 15-18psi at...
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    1993 MerCruiser 4.3L V6 RAN OUT OF OIL

    UPDATE - Pulled the engine. Found metal in the oil as expected. Also found a crack in the side of the block from the great freeze of 2021 here in Texas. New block is on the way along with a check of all our internals and new bearings. Also got the audio warning system fixed. The leak was the...
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    1993 MerCruiser 4.3L V6 RAN OUT OF OIL

    So if it was a rod bearing how do I know for sure? I also had a mechanic at the lake say the Cam Shaft might be likely.
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    1993 MerCruiser 4.3L V6 RAN OUT OF OIL

    Unfortunately no I wasn't watching that. I was playing with the sonar about 5 inches away.
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    1993 MerCruiser 4.3L V6 RAN OUT OF OIL

    I was the mechanic. The shop only did the block overhaul.
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    1993 MerCruiser 4.3L V6 RAN OUT OF OIL

    I installed the motor and I tightened EVERYTHING to factory recommended specs. The boat SHOULD have that alarm system but it doesn't work.
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    1993 MerCruiser 4.3L V6 RAN OUT OF OIL

    1993 MerCruiser 4.3L V6. TSMOH 4.6hrs Engine block professionally overhauled under 5 hours ago. I have been running the boat over the past couple of weeks fixing various issues. Today we put it in the water and ran about 2 miles across the lake to play with a new sonar. After idling for a...
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