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  1. R

    Johnson 5.5 CD-20C carb and running issues

    Yeah spark and coils are fine as well as the plugs. I haven’t gotten to the drive section of the motor yet as I’m still working on getting it running. The carb kit I ordered was supposedly a sierra kit, but I suspect it’s not, however I wasn’t really using anything out of it other than the float...
  2. R

    Johnson 5.5 CD-20C carb and running issues

    The That’s super helpful, thanks, I was looking for a more complete service manual
  3. R

    Johnson 5.5 CD-20C carb and running issues

    Yeah that sounds about how I have it currently
  4. R

    Johnson 5.5 CD-20C carb and running issues

    Yes the primer bulb gets hard, I double checked that the pump does pick up and pump fuel. As for polishing the seat, it’s a pretty standard procedure we do on all our carbs at our shop, basically I pull the seat out and use a non abrasive polishing compound on the end of a skewer down where the...
  5. R

    Johnson 5.5 CD-20C carb and running issues

    I’m working at rebuilding a Johnson 5.5 just for something to do and as a bit quieter replacement over my el cheapo hangkai. Compression is a bit low on both cylinders at around 70-75 psi, both cylinders have good spark, cylinders are clean with no scoring, has a vacuum pulse fuel pump which...
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