Yanmar 6LY3 series - Every 50 Hours of Operation

PERIODIC MAINTENANCE
Periodic Maintenance Procedures
4-10 6LY3 Service Manual
© 2007 Yanmar Marine International
Be sure to check the following every
50 hours or monthly, whichever comes first.
• Drain the Fuel Filter and Fuel Filter / Water
Separator
• Check the Battery Electrolyte Level
• Adjust the V-Belt Tension or Replace V-Belt
Drain the Fuel Filter and Fuel Filter / Water
Separator
Drain the Fuel Filter
1. Close the fuel cock of the tank.
2. Loosen the drain plug (Figure 4-5, (1)). Drain
off any water and dirt collected inside.
Figure 4-5
Figure 4-5
1 – Drain Plug
Drain the Fuel / Water Separator (Optional)
1. Close the fuel cock at fuel tank.
2. Loosen the drain plug (Figure 4-6, (5)) at the
bottom of the fuel / water separator and drain
off any water and dirt. NOTICE: If nothing drips
when the drain plug is opened, loosen the air
bleed bolt (Figure 4-6, (1)) on the top of the
fuel / water separator by turning
counterclockwise 2 to 3 turns. After draining, be
sure to tighten the air bleed bolt. (Air may bleed
back into the system because the
fuel / water separator position is higher than the
fuel level in the fuel tank.)
Figure 4-6
Figure 4-6
1 – Air Bleed Bolt
2 – Seal
3–Element
4 – Center Bolt
5 – Drain Plug
3. Remove the center bolt (Figure 4-6, (4)) to
disassemble the fuel / water separator. Clean
the element (Figure 4-6, (3)) with clean fuel.
4. When an additional fuel filter or fuel / water
separator is provided on the hull, drain, clean or
replace the element in it as well.
5. After reassembly of the fuel / water separator,
be sure to bleed air from the fuel system.
Every 50 Hours of Operation
0006162
(1)
0006163
(1)
(2)
(3)
(4)
(5)