1993 Johnson Evinrude "ET" 40 thru 55 Service Repair Manual, P/N 508283, Page 329Get this manual

1993 Johnson Evinrude "ET" 40 thru 55 Service Repair Manual, P/N 508283, Page 329

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Modes of Operation UP
from the reservoir
6 When the piston is completely extended, the UP relief valve is mechanically opened to protect the unit from extreme operating pressures7 When the