Yanmar 6LY3 series, Operation Manual

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PERIODIC MAINTENANCE
106
6LY3 Operation Manual
Replace the Fuel Filter Element
When the engine is operated on light
diesel oil, replace the fuel filter element
every 250 hours or one year of operation.
1. Close the fuel tank drain cock.
2. Remove the center bolt (Figure 6, (1))
at the bottom of the filter and take out
the filter element
(Figure 6, (2)) .
3. Replace the element with a new one
and tighten the center bolt
(Figure 6, (1)) .
Figure 6
Replace the Engine Oil
(Crankcase)
See Replace Engine Oil and Engine Oil
Filter on page 96.
Replace the Engine Oil Filter
Element
See Replace Engine Oil and Engine Oil
Filter on page 96.
Check the Seawater Pump
Impeller
Depending on use, the inside parts of the
seawater pump deteriorate and discharge
performance drops.
At the specified interval or when the
volume of seawater discharged is reduced,
inspect the seawater pump in accordance
with the following procedures:
1. Loosen the side cover bolts and
remove the side cover.
2. Illuminate the inside of the seawater
pump with a flashlight and inspect.
3. If any of the following problems are
found, disassembly and maintenance
are necessary:
• Impeller blades are cracked or nicked.
• Edges or surfaces of the blades are
marred or scratched.
• Wear plate is damaged.
4. If no damage is found when inspecting
the inside of the pump, reassemble the
side cover.
Note: Fit the O-ring to the groove on
the joint face before replacing
the side cover.
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000207 8 A
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