1985 OMC 65, 100 and 155 HP Models Commercial Service Manual, PN 507450-D, Page 156Get this manual
9If meter indicates voltage listed below, check ignition coil or coilsPower Pack Output
230 volts or higher 170 volts or higher
10If meter does not read indicated voltage or higher on one output, remove jumper lead from that cavity of connector from power packI nsert meter red lead into that cavityCrank engineIf meter reads indicated voltage or higher, ignition coil is defectiveIf meter does not read indicated voltage or higher, power pack is defective