Yamaha 115-225 HP Outboards Service Manual, Page 67Get this manual
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LOWER UNIT LEAKAGE CHECK 1) Tighten the gear-ail-drain screw, and connect the tester to the oil-level hole2) Pump the tester, and apply specified pressureThen place the gear case in the water tank3) Check that the pressure is held at specified pressure for 10 secondsSpecified pressure: 1.0 kgfsq.cm, 2.2 PSI, 1.020 bar NOTE: _ If the pressure falls, the leakage from lower unit is unacceptable, requiring re-inspection of its component parts
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