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  1. J

    2002 MerCruiser 5 Liter MPI Water in Oil

    I discovered water in my motor oil after an oil change. I believe the water is leaking through the intake manifold gasket. I replaced the manifold intake gaskets two years ago because of an oil leak in the back of the intake. I fixed the oil leak, but maybe the coolant ports of the intake did...
  2. J

    Water in Engine Oil 5.0 Liter MPI 2002

    Thanks..No salt water. The exhaust manifolds looked good a couple of years ago. I did a pressure test a couple of years ago as well. That is a good suggestion. What pressure should I put thru the system? I forget what I did in the past. If I remember correctly, I sealed off the exhaust at the...
  3. J

    Water in Engine Oil 5.0 Liter MPI 2002

    Thanks for your reply. I need to clone myself to get all of my fun projects completed.
  4. J

    Water in Engine Oil 5.0 Liter MPI 2002

    Thanks...Motor runs great...No dieseling...It does appear that Vortec motors do have issues with water leaking into the motor from the intake. I did replace the intake gasket in the spring because of a small oil leak and noticed a small amount of pitting around the water ports. I did not use any...
  5. J

    Water in Engine Oil 5.0 Liter MPI 2002

    Thanks for the reply!! I have a feeling it is the intake manifold gasket. Is there a way I can know for sure without pulling the intake off?
  6. J

    Water in Engine Oil 5.0 Liter MPI 2002

    It was a summer of boating hell. The drive locking up was random and very frustrating. It would lock at high rpms and then move freely afterwards. Before I knew it was the drive, I would pull the plugs and water was in the cylinders. I would turn the motor over without the plugs and water would...
  7. J

    Water in Engine Oil 5.0 Liter MPI 2002

    I replaced the intake gaskets because a small oil leak in the rear of the intake. I replaced the head gaskets because I thought the engine was Hydo locking (misdiagnosed). The Hydo locking turned out to be my stern drive locking-up at high rpms and sucking water thru the exhaust manifold...
  8. J

    Water in Engine Oil 5.0 Liter MPI 2002

    I change my engine oil today in preparation for winter storage and noticed the oil was milky so there is water in the oil. I don't believe there is a lot of water since I check my oil regularly though-out the season and did not notice the oil level rising. I replaced the intake manifold...
  9. J

    2002 Mercruiser 5 liter MPI Distributor Timing

    Got out on the water tonight and it appears the issue was timing. I did also replace the plugs, distributor cap and rotor to be safe, but moving the distributor around fixed the problem. Thanks!!
  10. J

    2002 Mercruiser 5 liter MPI Distributor Timing

    I was very careful in torqueing the intake bolts. Followed the Mercruiser Shop Manual word for word. Thanks....I will check for a vacuum leak. I have not checked that.
  11. J

    2002 Mercruiser 5 liter MPI Distributor Timing

    Thanks for the detailed response.!!
  12. J

    2002 Mercruiser 5 liter MPI Distributor Timing

  13. J

    2002 Mercruiser 5 liter MPI Distributor Timing

    Sorry..I should have kept my original thread. Thank you for the information...Any suggestions on how to get distributor closer to the mark? It appears if I go to the next gear on the distributor the tang points too far to the other side of the mark.
  14. J

    2002 Mercruiser 5 liter MPI Distributor Timing

    I did remove the distributor to replace the intake manifold gaskets and marked the placement of the distributor. I believed I got it back in the correct orientation. I just want to make sure it looks right.
  15. J

    2002 Mercruiser 5 liter MPI Distributor Timing

    Thanks for the info!!...I ordered a new cap and rotor to eliminate any issues with them. My plan for the distributor "phase issue", is to go to TDC on cylinder 1 and check if everything lines up correctly without removing the distributor. Make any adjustments if needed... I believe this should...
  16. J

    2002 Mercruiser 5 liter MPI Distributor Timing

    I marked the shaft relative to the intake manifold and the rotor relative to the housing before removal. When reassembling, I got the marks within + or -1/16 of an inch. Could this still be the issue?
  17. J

    2002 Mercruiser 5 liter MPI Distributor Timing

    Serial number = 0m345217 Some Background... Because of a small oil leak in the back of the intake manifold, I removed the intake manifold and replaced the gaskets. I ran it after the repair on muffs and it ran great at idle and at higher RPMs. Put the boat into the water today. It idled...
  18. J

    2002 Mercruiser 5 liter MPI cold start issue

    motor serial number = 0m345217
  19. J

    2002 Mercruiser 5 liter MPI cold start issue

    I have a cold start issue. This started two weeks ago. When I turn the key and start cranking the motor, it gives no signs of starting even after cranking the motor for 10-15 seconds. If I release the key from the cranking position to the run position it starts. As long as the key is in the...
  20. J

    5 liter Mercruiser wont Idle

    Thank You!!
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