Yanmar 6BY2 - Replace Fuel Volume Regulator; Replace Oil Pressure Sensor

ELECTRICAL AND ECU
Repair
12/05
BY Service Manual
12-27
© 2009 Yanmar Marine International
Replace Fuel Volume Regulator
NOTICE: When working on the oil, coolant or fuel
systems, you must protect the alternator from
contamination. Cover alternator with suitable
materials. Failure to comply may result in an
alternator failure.
1. Disconnect battery negative (-) cable.
2. Shut off all valves in the fuel supply system.
3. Remove intake manifold and cover intake ports
to prevent foreign objects from entering engine.
See Intake Manifold on page 5-66.
4. Thoroughly clean high-pressure fuel pump.
5. Disconnect electrical connector
(Figure 12-34, (1)). NOTICE: Immediately cap
or plug all openings to prevent contamination of
system
Figure 12-34
Figure 12-34
6. Remove three screws (Figure 12-34, (2)).
7. Remove fuel volume regulator.
8. Installation is done in the reverse of removal.
Tighten screws to 6.6 N·m (58 in.-lb).
9. Open all fuel supply valves.
10. Connect battery negative (-) cable.
11. Bleed fuel system. See Bleed the Fuel System
on page 6-22.
12. Start engine and check for fuel leaks.
13. Check and delete any trouble codes that are
registered in the ECU after the work has been
completed.
Replace Oil Pressure Sensor
1. Disconnect wires (Figure 12-35, (1)).
Figure 12-35
Figure 12-35
2. Remove oil pressure sensor (Figure 12-35, (2))
from heat exchanger bracket.
3. Install new O-ring on oil pressure sensor stem.
4. Install and tighten oil pressure sensor to 23 N·m
(204 in.-lb).
Note: Polarity of wire connections is not
important. Either wire can be connected
to either terminal.
5. Connect wires.
(
1
)
(
2
)
0006643
(1)
(
2
)