Yanmar 4BY2 Operation Manuals

Also see for 4BY2: Service manual

Contents

3. NOTICE: NEVER attempt to remove thecovers or fill a maintenance-free battery.Remove the caps and check theelectrolyte level in all cells.4. If the level is lower than the minimum filllevel (Figure 3, (1)), fill with distilledwater (Figure 3, (2)) (available locally)up to the upper limit (Figure 3, (3)) ofthe battery.(1)(2)(3)0002388Figure 3Note: The maximum fill level isapproximately 10 - 15 mm (3/8 - 9/16 in.)above the plates. Battery fluid tends toevaporate in high temperatures, especiallyin summer. In such conditions, inspect thebattery more often.Every 250 Hours of OperationPerform the following maintenance every250 hours of operation or yearly, whichevercomes first.• Draining the Fuel Tank• Replacing the Fuel Fine Filter• Replacing the Fuel Filter / WaterSeparator Element• Changing the Engine Oil andReplacing the Engine Oil FilterElement• Checking or Replacing the SeawaterPump Belt• Replacing the Anodes• Checking or Replacing the SeawaterPump Impeller• Replacing the Turbocharger HeatShield• Checking the Exhaust / Water MixingElbow• Replacing the Air Filter Element• Cleaning the Turbocharger Blower• Checking or Replacing the AlternatorBelt• Changing the Power Steering Fluid• Checking the Shift Cable Adjustment• Adjusting the Propeller ShaftAlignment• Checking the Hydraulic Oil Cooler• Checking or Replacing Rubber Hoses• Checking Flexible Engine MountsPERIODIC MAINTENANCE50 BY Series Operation Manual© 2008 Yanmar Marine International