What are these holes? Johnson AT-39

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  • September 22, 2020 at 11:16 pm #217141
    Swarlos
    Participant

      Hi folks, I’m starting to work on getting my grandfather’s old Johnson 5hp AT-39 going again. While looking around I saw 2 holes that reminded me of the weep exhaust holes in my 1968 Johnson 3hp, but they would be aimed directly at the transom while underway rather than out the back. Can anyone tell me what these are?

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      • This topic was modified 3 years, 6 months ago by Mumbles.
      September 23, 2020 at 11:35 am #217163
      aquasonic
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        US Member - 1 Year (includes $3 online payment fee)

        Those are exhaust relief holes. Just at a different orientation than your 68′ 3hp.

        September 23, 2020 at 12:23 pm #217166
        Buccaneer
        Participant

          US Member - 1 Year (includes $3 online payment fee)

          I have the next year’s version, an AT-10.
          Mine has a tell-tale hole drilled in the
          water line fitting, that pee’s out. Not sure
          if my driveshaft tube has the holes facing forward
          like yours, but will check.

          Prepare to be boarded!

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