1983 Johnson/Evinrude 2 thru V-6 outboards Service Repair Manual P/N 393765, Page 638Get this manual
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drop off no more than 700-1400 kPa (100-200 psi) after the motor is stoppedIf the gauge reading continues to drop, leakage is indicated in the trim up relief valve, impact letdown valve, tilt check va