1985 OMC 65, 100 and 155 HP Models Commercial Service Repair manual, PN 507450-D, Page 103Get this manual

1985 OMC 65, 100 and 155 HP Models Commercial Service Repair manual, PN 507450-D, Page 103

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The vacuum reading must be no more than 140 mm (5-12 inches) of mercury for 65 and 100 models, or 178 mm (7 inches) of mercury for 155 modelsIf vacuum reading exceeds maximum tolerance, the fue system