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    10hp Johnson Seahorse (QD-20) running slow

    Earlier this year I got my hands on a 1959 10hp Johnson Seahorse QD-20. It had a couple of random problems like a busted thermostat, bad water pump and I had to reset the magneto points. Before doing all this, I ran a compression test and both cylinders were at roughly 80-85 PSI (I'm not sure if...
  2. R

    1959 10hp Johnson Seahorse

    I recently bought an old 1959 Johnson Seahorse for basically dirt cheap. Ran it for a couple days no problem, but then I couldn't get it running anymore. Took it apart and ended up realigning the mag points, as well as replacing plug wires. After confirming I had good spark, I tried to get it...
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