Maintenance80TIP:If the propeller nut hole does not align withthe propeller shaft hole after tightening thepropeller nut, tighten the nut further or loosenthe nut to align the holes.EMU39785Changing gear oilWARNINGEWM02351Be 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 andgasket.F2.5AF4B, F5A, F6C4. Remove the oil level plug and gasket toallow the 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 oil, consult your Yamahadealer.5. Using a flexible or pressurized filling de-vice, inject the gear oil into the gear oildrain screw hole.1. Gear oil drain screw2. Oil level plug1. Gear oil drain screw2. Oil level plugRecommended gear oil:YAMALUBE outboard gear oil or Hyp-oid gear oilRecommended gear oil grade:SAE 90 API GL-4Gear oil quantity:F2.5AMH 0.075 L (0.079 US qt,0.066 Imp.qt)F4BMH 0.100 L (0.106 US qt,0.088 Imp.qt)F5AMH 0.100 L (0.106 US qt,0.088 Imp.qt)F6CMH 0.100 L (0.106 US qt,0.088 Imp.qt)12ZMU06779