The Fuji's have magneto ignition
I asume this is the connector you are referring to:
http://www.fujiengines.com/images/fjiginseta-2.jpg
If I recall, when this terminal is grounded to the engine case, the ignition is off (no spark).
If the terminal is left disconnected, the ignition is ON
I looked at the manual on the fuji website. No mention of the ignition connection.