2006 SD Johnson 4 Stroke 9.9-15HP Outboards Service Manual, Page 96Get this manual
IGNITION SYSTEM OPERATION
OPERATION
The ignition system is condenser discharge typeThe condenser built in the COl unit stores the electrical energy generated by the condenser charge coilThe electrical energy stored in the condenser is released to the ignition coil primary windings by the ignition timing signal calculated by the COl unit from the pulser coil signalIgnition timing varies based upon engine speed Timing is fixed at 10 ATOC until the engine startsTiming then varies from ATOC to 30 BTOC based on engine speedEngine stop switch