Specifications and requirements15for a smaller operating load and a smallerpitch propeller for a heavier load. If you carryloads that vary widely, select the propellerthat lets the engine run in the proper range foryour maximum load but remember that youmay need to reduce your throttle setting tostay within the recommended engine speedrange when carrying lighter loads.To check the propeller, see page 78.F2.5AF4B, F5A, F6CEMU39192Start-in-gear protection (F4B,F5A, F6C)Yamaha outboard motors are equipped withstart-in-gear protection device. This featurepermits the engine to be started only when itis in neutral. Always select neutral beforestarting the engine.EMU44830Engine oil requirementsSelect an oil grade according to the averagetemperatures in the area where the outboardmotor will be used.If oil grades listed under Recommended en-gine oil grade 1 are not available, select an al-ternative oil grade listed underRecommended engine oil grade 2.1. Propeller diameter in inches2. Propeller pitch in inches3. Type of propeller (propeller mark)1. Propeller diameter in inches2. Propeller pitch in inches3. Type of propeller (propeller mark)ZMU04604-x1 2 3ZMU06853-x1 2 3Recommended engine oil:YAMALUBE 4 or 4-stroke outboardmotor oilRecommended engine oil grade 1:SAE 10W-30/10W-40/5W-30API SE/SF/SG/SH/SJ/SLRecommended engine oil grade 2:SAE 15W-40/20W-40/20W-50API SH/SJ/SLEngine oil quantity:F2.5AMH 0.35 L (0.37 US qt,0.31 Imp.qt)F4BMH 0.6 L (0.63 US qt,0.53 Imp.qt)F5AMH 0.6 L (0.63 US qt,0.53 Imp.qt)F6CMH 0.6 L (0.63 US qt,0.53 Imp.qt)