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  1. ranger335

    1981 Johnson 90 HP overheating, but not all the time

    I think I've found the intermittent part of my problem. I retested the sensor that sounded at 180 and it went to just over 200. Gunna try again and report back.
  2. ranger335

    1981 Johnson 90 HP overheating, but not all the time

    I removed the water covers, no blockages. I tested the heat sensors one grounds at 180 and the other a hair over 200. I can't seem to find a definitive answer to at what temp they should ground.
  3. ranger335

    1981 Johnson 90 HP overheating, but not all the time

    Can you explain what the diverters do? I don't have a problem with replacing them, I just want to understand.
  4. ranger335

    1981 Johnson 90 HP overheating, but not all the time

    After I looked at several pictures on here, I think I figured out the water diverters. They make the water go vertical, not horizontal. If so, mine are fine.
  5. ranger335

    1981 Johnson 90 HP overheating, but not all the time

    I have welder fingers, so I'm not a good judge.
  6. ranger335

    1981 Johnson 90 HP overheating, but not all the time

    Yes, 180 something and 165.
  7. ranger335

    1981 Johnson 90 HP overheating, but not all the time

    No, but that can be my project for later today.
  8. ranger335

    1981 Johnson 90 HP overheating, but not all the time

    Yes. Last summer. All seemed to be good. This morning I left them in place. gaskets are cheap though, I can remove them if you think it will provide some insight.
  9. ranger335

    1981 Johnson 90 HP overheating, but not all the time

    Ongoing/intermittant problem for over a year. Replaced the impeller (twice), thermostats and flushed out the heads and or block using a water hose hooked directly to the hose fittings on the blocks. That was last year. This year I replaced the inlet screens and re flushed. Thought I had it, but...
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