Yanmar 6BY2 - Every 250 Hours of Operation

PERIODIC MAINTENANCE
Periodic Maintenance Procedures
12/05
BY Service Manual
4-11
© 2009 Yanmar Marine International
NOTICE: NEVER turn off the battery switch (if
equipped) or short the battery cables during
operation. Damage to the electric system will result.
1. Turn the battery master switch to OFF (if
equipped) or disconnect the negative (-) battery
cable.
2. Do not operate with insufficient battery
electrolyte as the battery will be destroyed.
3. NOTICE: NEVER attempt to remove the covers
or fill a maintenance-free battery.
Remove the caps and check the electrolyte level
in all cells.
4. If the level is lower than the minimum fill level
(Figure 4-3, (1)), fill with distilled water
(Figure 4-3, (2)) (available locally) up to the
upper limit (Figure 4-3, (3)) of the battery.
Figure 4-3
Figure 4-3
Note: The maximum fill level is approximately
10 to 15 mm (3/8 to 9/16 in.) above the
plates. Battery fluid tends to evaporate in
high temperatures, especially in summer.
In such conditions, inspect the battery
more often.
Perform the following maintenance every 250 hours
of operation or one year, whichever comes first.
• Draining Water and Sediment from Fuel Tank
• Replacing the Fuel Fine Filter
• Replacing the Fuel Filter / Water Separator
Element
• Changing the Engine Oil and Replacing the
Engine Oil Filter Element
• Checking / Replacing the Seawater Pump and
Alternator Belts
• Replacing the Anodes
• Checking or Replacing the Seawater Pump
Impeller
• Replacing the Turbocharger Heat Shield
• Checking the Exhaust / Water Mixing Elbow
• Replacing the Air Filter Element
• Cleaning the Turbocharger Blower
• Checking / Changing the Alternator Belt
• Checking / Changing the Power Steering Fluid
• Checking the Shift Cable Adjustment
• Adjusting the Propeller Shaft Alignment
• Checking the Hydraulic Oil Cooler
• Checking or Replacing Rubber Hoses
• Checking the Flexible Engine Mounts
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Every 250 Hours of Operation