The ignition system for the “H” series motors is a little different than the later universal ignition shown above. This ignition features “horseshoe” coils that have the coil shoes facing inward toward the crankshaft instead of outward toward the flywheel. The magnets are imbedded in a rotor that spins with the crankshaft.
Most of the time, the condensers and coils survive on these motors, and it would be unusual for both ignitions to go dead. Tubs mentioned dirty oxidized points as a possible problem and that’s a very likely cause, but you have cleaned and reset the points.
One thing to check is that the very tiny insulators in the points that prevent the tiny screws from shorting out are intact. If these easily lost insulators are missing or degraded, the points cannot break electrically and there will be no spark. Points can also be tested with an ohmmeter both opened and closed.
The kill switch also has insulating washers that alternate with conducting parts.
A helpful website for H and T model Johnsons: pochefamily.org
The 52 PSI compression is low for this model. These rotary valve motors prefer 70+ PSI for a good idle. The compression will improve some with use if you can get it running.
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