1985 OMC 65, 100 and 155 HP Models Commercial Service Manual, PN 507450-D, Page 149Get this manual
Ignition System Tests Using An Ohmmeter 65 and 155 Models
Ohmmeter tests are necessary to determine if the sensor coil or charge coil have failed in manner which could cause ignition failurehas completely cooled to ambient air temperatureThe higher temperature, caused by running the motor, will increase the resistance reading and may result in unnecessary parts replacement
INotel Resistance readings should be checked when the motor