Search results

  1. F

    Overheating mercruiser 3.7l lx

    I have the aluminum exhaust manifold.
  2. F

    Overheating mercruiser 3.7l lx

    I don’t let it get hot enough to do that
  3. F

    Overheating mercruiser 3.7l lx

    I feel like the heat is starting in the exhaust manifold but only because that is the first place to get hot. Could there be something obstructing flow through there?
  4. F

    Overheating mercruiser 3.7l lx

    As far as checking the circulation impeller, what I have done was installed a clear tube on the return side of the HX to verify flow and it seemed to have good flow.
  5. F

    Overheating mercruiser 3.7l lx

    Thanks for jumping on this so darn fast too. I love this forum
  6. F

    Overheating mercruiser 3.7l lx

  7. F

    Overheating mercruiser 3.7l lx

    And yes, if I put the engine under load it will go above 180. I just got a head back because of that
  8. F

    Overheating mercruiser 3.7l lx

    I removed the out drive before starting the engine with hose on the hx so the impeller is fine. I know 116 is too cold I was just doing different thing on both engine to gather a frame of reference. I wanted data to compare one engine to the other in a variety of situations. As far as check it...
  9. F

    Overheating mercruiser 3.7l lx

    Yes sir, I’m only reading the temp with an ir gun
  10. F

    Overheating mercruiser 3.7l lx

    Ok, I know this has been covered but I haven’t found the thread that can give me the info I need to solve the issue. So here it goes... I had a pair of these engines completely rebuilt, one of which works perfectly. The other however has run hot from the first turn of the key. New riser, new...
Top