1990 Johnson Evinrude 120 thru 140, 185 thru 225, 300 HP, P/N 507875, Page 413Get this manual
8Install pressure gauge and adapter "A" to check problems in the UP circuit INotel Tighten
gauge and adapter lightly to 5-10 inIbs(0,6-1,2 Nm)Excessive torque might damage adapter or a-ring
9Cycle hydraulic unit UP and DOWN several times and check fluid level before proceeding f"2l 10With all cylinders completely retracted, begin running the I=J unit UP The gauge should show approximately 200 PSI (1379 kPa) as the cylinders are extending The gauge should show approximately (10,342 kPa) as the unit stalls1500 PSI
The stall pressure reading must not drop by more than 200 PSI (1379 kPa) after the motor stops11If your test results vary from those in Step 10, problem in the UP circuit is indicatedRefer to Page 10-6 for list of possible faults12Following Steps through 9, install pressure gauge and adapter "8" to check problems in the DOWN circuit13With all cylinders completely extended, begin running the unit DOWN The gauge should show approximately 800 PSI (5516 kPa) as the cylinders are retracting The gauge should show approximately 900 PSI (6206 kPa) as the unit stalls The stall pressure reading must not drop by more than 200 PSI (1379 kPa) after the motor stops14If your test results vary from those in Step 13, problem in the DOWN circuit is indicatedRefer to Page 10-7 for list of possible faults