OK, so the next steps are to try a different spark plug, then try holding the spark plug lead itself close to the metal, and if both of those fail, find out why there is no spark. (I can tell you though, that quite a few people find it was the spark plug that was at fault.)
When there really is no spark, it is usually because of a fault in the kill-switch (engine-stop switch) circuit. This seems especially likely in the case of your machine, because from the owner manual, it seems that the owner has to connect the wires involved as part of the initial assembly process when he buys the machine. So, you will need to disconnect the wires that go to the kill switch, at their connectors just outside the magneto. After disconnecting them, make sure there are no bare metal bits that could touch something: and we need to see pictures of what you have done. Then see if it suddenly has spark.
Remember, if you establish definitely that the kill switch wiring is not the problem, the next step has to be trying another magneto, which is likely to be uneconomic to do. Hence you've got a lot riding on finding a cause of no spark that is external to the magneto unit.
