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Recent content by Kluth

  1. K

    73 Johnson 20HP no run

    10-4, ill swap out the fuel and take a look at the thermostat. Head gasket is set to come in today!
  2. K

    73 Johnson 20HP no run

    Head gasket definitely leaky, but cylinder walls look great. No scoring, you can still see the cross hatching
  3. K

    73 Johnson 20HP no run

    Will remove and check after I get off work and report back, thank you for the help so far
  4. K

    73 Johnson 20HP no run

    Other gauge read around 70 as well. Yes good spark with plug grounded to the block. Gear case had a little bit of water in it but mainly oil. Planning on checking gear case more in depth once it’s running. Whats a good place to diagnose the low compression. I know the normal culprit on dirtbikes...
  5. K

    73 Johnson 20HP no run

    Hey guys, got my first boat motor it’s a 1973 Johnson seahorse 20Hp. It currently doesnt run and I’m at a stand still. It has spark, fuel, and compression but still no run not even a sputter. Compression was a bit low at 72psi on both cylinders not sure if thats too low or not. Not sure if I'm...
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