1996 Johnson/Evinrude Outboards 50 thru 70 3-Cylinder Service Repair Manual P/N 507125, Page 219Get this manual

1996 Johnson/Evinrude Outboards 50 thru 70 3-Cylinder Service Repair Manual P/N 507125, Page 219

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Screw in vacuum testerPump out to 3-6 in(76-127of ecuy and see if vacuum holdsThen pump out to 15 in(381of ecuy and checkIf the gearcase fails to hold either test, put lubricant around suspected sealI