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  1. R

    1994 Mercury 40HP 2 stroke outboard overheating

    Not to the point where the metal flares up in the center because it is rubbing on the main shaft. Anyhow, let's just agree it was bad sir. So far your input has not been helpful at all.
  2. R

    1994 Mercury 40HP 2 stroke outboard overheating

    Hello Buddhapi. I found the issue and fixed my outboard yesterday. Where the copper pipe from the water pump inserts into the exhaust plate there into a small plastic fitting and grommet that has two screws that hold the fitting to the exhaust plate. The screws were loose and the gasket was...
  3. R

    1994 Mercury 40HP 2 stroke outboard overheating

    Exactly same. I think it has to be the exhaust plate gasket. Water is blasting right from the copper pipe into the mid unit through the gasket. Who knows maybe the copper pipe housing or gasket is loose/bad. I bought the parts to replace all of it. Will do it when they arrive mid week. I’ll let...
  4. R

    1994 Mercury 40HP 2 stroke outboard overheating

    Thanks for your help. So water pouring down the exhaust tube as in picture #6492 is normal? adding to that, the majority of the water flow is coming down the central cavity where the drive shaft is. I estimate 80% comes down the central cavity, 10-15% out through the exhaust tube and the rest...
  5. R

    1994 Mercury 40HP 2 stroke outboard overheating

    I've replaced my water pump twice and engine is still overheating. I get tons of smoke/steam out of the pee hole and when I shut down the engine it puffs out a huge cloud of steam/smoke. See photo. I suspect the exhaust plate gasket is damaged right where the copper tube slips into it's home...
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