Yanmar 4BY2 - Initial 50-Hour Maintenance

PERIODIC MAINTENANCE
PROCEDURES
After Initial 50 Hours of
Operation
Perform the following maintenance
procedures after the initial 50 hours of
operation.
• Changing the Engine Oil and
Replacing the Engine Oil Filter
• Checking Shift Cable Adjustment
• Adjusting the Propeller Shaft
Alignment (If Equipped with Marine
Gear)
Changing the Engine Oil and
Replacing the Engine Oil Filter
The engine oil on a new engine becomes
contaminated from the initial break-in of
internal parts. It is very important that the
initial oil replacement is performed as
scheduled.
It is easiest and most effective to drain the
engine oil after operation while the engine is
still warm. WARNING! If you must drain
the engine oil while it is still hot, stay
clear of the hot engine oil to avoid being
burned. ALWAYS wear eye protection.
1. Turn engine OFF.
2. Remove engine cover.
3. NOTICE: Prevent dirt and debris from
contaminating engine oil. Carefully
clean the dipstick and the surrounding
area before you remove the cap.Loosen
the engine oil filter cap (Figure 1, (2)) 1
- 2 turns with a socket wrench. Allow to
sit a few minutes to allow oil to drain into
crankcase.
0003653
(
1
)
(
2
)
Figure 1
4. Remove the engine oil dipstick
(Figure 1, (1)). Attach an oil drain pump
and pump out the oil. Dispose of waste
properly.
5. Remove the engine oil filter cap and
filter assembly.
6. Remove the filter element from stem.
7. Replace the three O-rings
(Figure 2, (1)) on the stem.
0003652
(1)
Figure 2
PERIODIC MAINTENANCE
48 BY Series Operation Manual
© 2008 Yanmar Marine International