Yanmar 4BY2 Operation Manuals

Also see for 4BY2: Service manual

Contents

○: Check or Clean ◊: Replace ●: Contact your authorized Yanmar marine dealer or distributorSystem Item Periodic Maintenance IntervalDailySee DailyCheckson page46Every50hours ormonthlywhich-evercomesfirstEvery250hoursor oneyearwhich-evercomesfirstEvery500hoursor 2yearswhich-evercomesfirstEvery1000hoursor 4yearswhich-evercomesfirstEvery2000hoursor 8yearswhich-evercomesfirstElectricalSystemCheck theelectrolyte levelin the battery(serviceable bat-teries only)●Check the wiringconnectors○BeforestartingCheck alternatorbelt for wear,replace ifnecessary○ ●Miscellane-ous ItemsCheck the alarmand indicators (ifequipped)○Check orchange powersteering fluid● ●Check for wateror oil leakage○BeforestartingCheck shiftcable adjust-ment●Initial 50 ●Adjust thepropeller shaftalignment (ifequipped withmarine gear)●Initial 50 ●Check hydraulicoil cooler ●Check andreplacerubberized ho-ses (fuel and wa-ter)●Check flexibleengine mounts ○ ●* Check anodes periodically. Any anode having less than half its original size remaining should be replaced -use this to establish a regular replacement interval.Note: These procedures are considerednormal maintenance and are performed atthe owner’s expense.PERIODIC MAINTENANCEBY Series Operation Manual 45© 2008 Yanmar Marine International