1985 OMC 65, 100 and 155 HP Models Commercial Service Manual, PN 507450-D, Page 146Get this manual
Ignition System Schematic
Current flowing through the No.1 ignition coil primary winding produces large magnetic field surrounding the secondary wind ing and produces the high voltage to the spark plug, igniting the fuel in cylinder No.1When S.CRNo2 is triggered in the port side packthe same process fires cylinder No2Then S.C.RNo.3 is triggered in the same mannerThe S.C.R No.4 is then triggered in the port side pack to fire cylinder No.4S.C.RNo.5 is triggered in the starboard power pack to fire cylinder No.5 in the same mannerThe S.C .RNo is then triggered in the port side pack to fire cylinder No.6
Ignition Coils SensorSensor #2 Sensor3