Replace Fuel Filters - Yanmar BY Series Service Manual

Repair
12/05
10. Connect electrical connector to fuel volume
regulator (Figure 6-35, (1)).
11. Install alternator drive belt. See Remove and
Install Alternator on page 11-5.
12. Install intake manifold. See Intake Manifold on
page 5-66.
13. Open all fuel supply valves.
14. Connect the battery negative (-) cable.
15. Bleed fuel system. See Bleed the Fuel System
on page 6-22.
16. Start the engine and check for leaks.
17. Check and delete any trouble codes that are
registered in the ECU after the work has been
completed. See Trouble Codes on page 13-10.
BY Service Manual

Replace Fuel Filters

Replace Fuel Fine Filter
CAUTION! Remove any insulation material that
has come into contact with fuel.
1. Disconnect the battery negative (-) cable.
2. Close the fuel tank cock.
3. Unscrew and remove filter cartridge
(Figure 6-36, (1)).
Figure 6-36
4. Replace rubber seal.
5. Replace filter. NOTICE: When replacing fuel
filters, always pre-fill them with fresh, clean fuel
to improve the system ability to be bled.
6. Hand-tighten cartridge to filter.
7. Connect the battery negative (-) cable.
8. Bleed the fuel system and check for leaks. See
Bleed the Fuel System on page 6-22.
Replace the Fuel Filter / Water Separator
Note: Yanmar supplies a water separating
pre-filter separate from the engine.
Location and type of filter may vary.
1. Disconnect the battery negative (-) cable.
2. Close the fuel tank cock.
3. Loosen the drain plug (Figure 6-37, (4)) on the
bottom of the fuel filter / water separator and
drain off any water or sediment.
4. Disconnect water sensor connector
(Figure 6-37, (1)).
5. Turn the filter bowl (Figure 6-37, (5))
counterclockwise to remove.
© 2009 Yanmar Marine International
FUEL SYSTEM
(1)
0006638
Figure 6-36
6-19