1993 Johnson Evinrude "ET" 2 thru 8 Service Repair Manual, P/N 508281, Page 222Get this manual
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Pump pressure up to 3-6 PSI (21-42 kPa)If pressure gauge indicates leakage, submerge the gearcase in water to determine source of leakage as evidenced by bubblesIf the gearcase pressure gauge does not