Yanmar 6BY2 - Remove and Install Fuel Rail

FUEL SYSTEM
Repair
6-20 BY Service Manual
© 2009 Yanmar Marine International
6. Remove the old filter element
(Figure 6-37, (3)).
Figure 6-37
Figure 6-37
7. Clean the filter bowl. Inspect the water sensor
probe (Figure 6-37, (1)) for damage. Inspect
the bowl seal (Figure 6-37, (2)). NOTICE:
When replacing fuel filters, always pre-fill them
with fresh, clean fuel to improve the system’s
ability to be bled.
8. Lubricate the seal at the top of the new filter
element (Figure 6-37, (3)) and install.
9. Lubricate the filter bowl seal (Figure 6-37, (2))
and install the filter bowl. Turn clockwise by
hand to tighten.
10. Ensure drain plug (Figure 6-37, (4)) is securely
tightened.
11. Connect water sensor connector (Figure
6-37, (1)).
12. Open the fuel cock.
13. Connect the battery negative (-) cable.
14. Bleed fuel system and check for leaks. See
Bleed the Fuel System on page 6-22.
Remove and Install Fuel Rail
1. Disconnect the battery negative (-) cable.
2. Shut off all valves in the fuel supply system.
3. Remove intake manifold. See Intake Manifold
on page 5-66.
4. Use special socket (Figure 6-38, (2)) to loosen
clamp (Figure 6-38, (1)). Remove the hose.
Figure 6-38
Figure 6-38
5. Remove all high-pressure fuel lines
(Figure 6-39, (1)). See Remove and Install
High-Pressure Fuel Lines on page 6-14.
Figure 6-39
Figure 6-39
6. Disconnect electrical connectors from fuel
pressure sensor (Figure 6-39, (2)) and fuel
pressure regulator (Figure 6-39, (3)).
7. Remove bolts (Figure 6-39, (4)) and remove
fuel rail from engine.
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0003650
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0003689
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1
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0003677
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