Maintenance43NOTE:When operating in salt water, turbid or muddy water, the engine should be flushed with cleanwater after each use.EMU28931GreasingYamaha marine grease (Water resistant grease)60D, 70DOil tank water drain Inspection / cleaningSpark plug(s) Cleaning / adjustment /replacementItem ActionsInitial Every10 hours(1 month)50 hours(3months)100hours (6months)200hours (1year)ZMU03125