Maintenance91TIP:If the propeller nut slot does not align with thepropeller shaft hole after tightening the pro-peller nut to the specified torque, tighten thenut further to align the slot with the hole.EMU41194Changing gear oilWARNINGEWM02531 Make sure that the outboard motor ismounted securely to the transom or astable stand. You could be severely in-jured if the outboard motor falls on you. Never get under the lower unit while itis tilted. Severe injury could occur if theoutboard motor accidentally falls.Before filling the lower unit with gear oil, theoutboard motor must be placed in a verticalposition. If you are not able to place the out-board motor in a vertical position, have aYamaha dealer change the gear oil.1. Tilt the outboard motor so that the gearoil drain screw is at the lowest point pos-sible.2. Place a suitable container under thegear case.3. Loosen the bolt, and then remove thecooling water inlet covers on both sidesof the gear case.4. Remove the gear oil drain screw andgasket.5. Remove the oil level plug and gasket toallow the gear oil to drain completely.NOTICE: Check the used gear oil afterit has been drained. If the gear oil ismilky or contains water or a largeamount of metal particles, the gearcase may be damaged. Have aYamaha dealer check and repair theoutboard motor. [ECM00714]TIP:For disposal of used gear oil, consult yourYamaha dealer.1. Cotter pin1ZMU069561. Cooling water inlet cover2. Bolt1. Gear oil drain screw2. Gasket11 2ZMU071891 2ZMU07190©2017 Yamaha Motor Corporation, U.S.A.
