1990 Johnson Evinrude "ES" 60 thru 70 Service Manual, P/N 507873, Page 293Get this manual
COA2503
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18Insert the trim-down pump relief valve and spring the manifold in the position shown
19Oil and install new high pressure port a-ring the position shown
20Inspect the rubber keeper on the pump drive coupling The rubber keeper provides cushion between the motor and the pumpIf the keeper is not present, there is chance that the tang on the pump coupling could be broken off when the motor is energized