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  1. R

    73 50hp Johnson not firing top cylinder

    I posted some questions about this engine earlier. The engine was sitting for a few years. before I got it. This is what's going on.<br /><br />Top cylinder not firing. (running on bottom only)<br />Removed plugs, both sparks look strong.<br />Swapped plugs, no change.<br />Swapped Coils, no...
  2. R

    Johnson 50 cuts out

    I just purchased a boat with a '73 Johnson 50hp. the boat hasen't been run in years. I took it out for a spin and it ran great for about 15 miles full throttle. I turned around to head back up the lake and when I went to give it full throttle it had no power. I switched to a different tank and...
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