Yamaha F150A Service Manual

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8-28Drive shaft and lower case (regular rotation model)012345678910A4. Align the slot “a” in the impeller “2” withthe Woodruff key “1”, and then install theimpeller “2”.5. Install the washers “1”, wave washer “2”,spacer “3”, and collar “4”.TIP:The spacer “3” and collar “4” should fittogether firmly.6. Install a new O-ring “1”.7. Install the water pump housing “1”.Do not turn the drive shaft counterclock-wise. Otherwise, the water pump impellercould be damaged.TIP:While turning the drive shaft clockwise, pushthe water pump housing down to install it.Checking the lower unit for airleakage1. Remove the check screw “1”, and theninstall the special service tool “2”.2. Apply the specified pressure. Check thatthe pressure is maintained in the lowerunit for 10 seconds or more.Do not overpressurize the lower unit. Oth-erwise, the oil seals could be damaged.12a112341 Leakage tester “2”: 90890-06840Lower unit holding pressure:69.0 kPa (0.69 kgf/cm2, 10.0 psi)112