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  1. R

    Mercruiser 502 (7.4l) turning over slowly, won't start.

    Engine oil is forest green and thick. Smells like gear oil to me.
  2. R

    Mercruiser 502 (7.4l) turning over slowly, won't start.

    Just discovered that the engine oil is too high and is a translucent forest green color that smells suspiciously like gear oil.
  3. R

    Mercruiser 502 (7.4l) turning over slowly, won't start.

    Uh oh. Oil is thick forest green. Looks like someone put gear oil in engine at last service.
  4. R

    Mercruiser 502 (7.4l) turning over slowly, won't start.

    Six months ago all you had to do was just touch the ignition key and it would fire right up
  5. R

    Mercruiser 502 (7.4l) turning over slowly, won't start.

    Super clan boat and terminals
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    Mercruiser 502 (7.4l) turning over slowly, won't start.

    1993 bowrider with a mercruiser 502 EFI engine. Was attempting to jump start it and it would turn over slowly but not start and then eventually wouldn't turn over at all. Pulled the old starter and it was non-working. Put in a new starter and and new batteris. Now the engine turns over but...
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    1999 Mercruiser 7.4 (454) MPI Engine overheated today...

    Roger that…
  8. R

    1999 Mercruiser 7.4 (454) MPI Engine overheated today...

    This is a great forum. Gotten much more useful information than I would’ve ever suspected. Thank you all above for all of your input I’m sure I’ll figure this out.
  9. R

    1999 Mercruiser 7.4 (454) MPI Engine overheated today...

    If I suspect pieces of impeller in the oil cooler or other components how do I fish them out?
  10. R

    1999 Mercruiser 7.4 (454) MPI Engine overheated today...

    This great Info! I can easily do all this...One question though what will be in the hose between fuel module and oil cooler? ...Pieces of Pump!? yikes...
  11. R

    1999 Mercruiser 7.4 (454) MPI Engine overheated today...

    0L335439
  12. R

    1999 Mercruiser 7.4 (454) MPI Engine overheated today...

    IAC whistle? Identify IAC please... Thanks, Bob
  13. R

    1999 Mercruiser 7.4 (454) MPI Engine overheated today...

    6 mos ago
  14. R

    1999 Mercruiser 7.4 (454) MPI Engine overheated today...

    This is the flame arrestor with crud scraped off. The edges still indicate the material that was coating it when I looked at it.
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    1999 Mercruiser 7.4 (454) MPI Engine overheated today...

    I have a 1999 Mercruiser 7.4 (454) MPI Engine Connected to a Mercruiser Bravo I outdrive. Today while at 3/4 throttle I heard a whistling sound from the engine bay and it started to over heat. I raised the engine cover and traced the sound to the throttle body area. The flame arrestor had a...
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