Yanmar 4BY2 Operation Manuals page 57

Draining the Fuel Tank
(3)
Figure 4
1 – Sediment Bowl
2 – Drain Cock
3 – Fuel Line to Engine
Note: Typical fuel tank shown. Actual
equipment may differ.
1. Turn engine OFF.
2. Put a container under the drain cock
(Figure 4, (2)) to catch fuel.
3. Open the drain cock and drain water
and sediment. Close the drain cock
when the fuel is clean.
4. Dispose of waste properly.
BY Series Operation Manual
(2)
(1)
0004542
© 2008 Yanmar Marine International
PERIODIC MAINTENANCE
Replacing the Fuel Fine Filter
1. Disconnect the battery negative (-)
cable.
2. Close the fuel tank cock.
Figure 5
3. Unscrew and remove filter cartridge
(Figure 5, (1)).
4. Replace rubber seal.
5. Replace filter. NOTICE: When replacing
fuel filters, always pre-fill them with
fresh, clean fuel to improve the system's
ability to be bled.
6. Hand-tighten cartridge to filter.
7. Connect battery negative (-) cable.
8. Bleed the fuel system and check for
leaks. See Bleeding the Fuel System on
page 24.
(1)
0006638
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