1985 OMC 65, 100 and 155 HP Models Commercial Service Repair manual, PN 507450-D, Page 180Get this manual

1985 OMC 65, 100 and 155 HP Models Commercial Service Repair manual, PN 507450-D, Page 180

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Running Tests Using C.DVoltmeter and Adapter100 Models
Make All Running Tests at Minimum of 1000 RPM Before making ignition checks, place spark checker on the spark plug high tension leadsAdjust