1998 Johnson Evinrude EC 50 thru 70 HP 3-Cylinder Service Repair Manual P/N 520208, Page 221Get this manual
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Install in testerout to 3-6 inches (76-127 Hg and see if holdsThen out to 15 inches (381 Hg and checkIf the gearcase fails to hold either test, put lubricant around suspected sealIf leak then stops lu