1983 Johnson/Evinrude 2 thru V-6 outboards Service Repair Manual P/N 393765, Page 523Get this manual

1983 Johnson/Evinrude 2 thru V-6 outboards Service Repair Manual P/N 393765, Page 523

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Screw in vacuum testerPump out to 76127 mm (3"5") of mercury and see if vacuum holdsThen pump out to 381 mm (15") of mercu ry and checkI the gearcase fails to hold on either test, put oil around suspe