Yanmar 6LY3 series Service Manual page 53

Periodic Maintenance Procedures
12/05
Fuel System Air Bleeding Procedures
1. Check the fuel level in the fuel tank. Fill if
necessary.
2. Loosen the air bleed bolt on the fuel filter by
turning it 2 or 3 turns.
3. Pump fuel with the fuel feed pump by moving
the knob on the top of the feed pump up and
down.
4. Allow the fuel and air bubbles to flow from the
air bleed bolt hole. When the fuel no longer
contains bubbles, tighten the air bleed bolt. This
completes the air bleeding of the fuel system.
Start the engine.
5. Repeat steps 1 through 4 if necessary.
6. After engine start-up, the automatic air-bleeding
device purges the air from the fuel system. No
manual air bleeding is required for normal
engine operation.
6LY3 Service Manual
Figure 4-24
1 – Cover
2 – Gasket
3 – Filter Element
4 – Gasket
5 – Spring
6 – Case
7 – Gasket
8 – Drain Plug
9 – Gasket
10 – Center Bolt
© 2007 Yanmar Marine International
PERIODIC MAINTENANCE
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Figure 4-24
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