Maintenance623. Remove the propeller and thrust washer.EMU30672Installing propellerEMU39322Spline modelsNOTICEECM00500Be sure to use a new cotter pin and bendthe ends over securely. Otherwise the pro-peller could come off during operation andbe lost.1. Apply Yamaha grease D (corrosion resis-tant grease) into the propeller shaft.2. Install the thrust washer and propelleronto the propeller shaft. NOTICE: Besure to install the thrust washer beforeinstalling the propeller, otherwise thelower case and propeller boss couldbe damaged. [ECM01880]3. Install the washer and tighten the propel-ler nut until there is no looseness in thepropeller.4. Align the propeller nut hole with the pro-peller shaft hole. Insert a new cotter pin inthe holes and bend the cotter pin ends.NOTICE: Do not reuse the cotter pininstalled. Otherwise the propeller cancome off during operation. [ECM01890]TIP:If the propeller nut hole does not align with thepropeller shaft hole after tightening the pro-peller nut, tighten the nut further or loosen thenut to align the holes.EMU39780Changing gear oilWARNINGEWM02350Be sure the outboard motor is securelyfastened to the transom or a stable stand.You could be severely injured if the out-board motor falls on you.1. Put the outboard motor in an upright po-sition (not tilted).2. Place a suitable container under the gearcase.3. Remove the gear oil drain screw and gas-ket.1. Cotter pin2. Propeller nut3. Washer4. Propeller5. Thrust washer