Yanmar BY series, Service Manual

Page: 148 / 275

FUEL SYSTEM
BY Service Manual 6-19
Repair
12. Start engine and check for fuel leaks.
Replacing the Fuel Feed Pump
1. Disconnect the battery negative (-) cable.
2. Shut off fuel supply valve at fuel tank.
Figure 6-19
3. Disconnect electrical connector
(Figure 6-19, (1)) .
4. Remove supply line (Figure 6-19, (2)) and
pressure line (Figure 6-19, (3)) from fuel feed
pump. Install caps or plugs on all open fittings
to prevent contamination of the fuel system.
5. Remove four bolts and remove pump from
electrical bracket.
6. Transfer fuel pump mounts to new pump.
7. Install fuel feed pump.
8. Connect the supply and pressure lines.
9. Connect the electrical wiring connector.
10. Open fuel supply valve.
11. Bleed fuel system. See Bleeding the Fuel
System on page 6-29 .
12. Start the engine and check for leaks.
13. Check and delete any trouble codes that are
registered in the ECU after the work has been
completed.
See Fault Codes on page 13-20.
A
WARNING
HIGH PRESSURE HAZARD!
• Avoid skin contact with high pressure
diesel fuel spray caused by a fuel
system leak such as a broken fuel
injection line. High pressure fuel can
penetrate your skin and result in
serious injury. If you are exposed to
high pressure fuel spray, obtain
prompt medical treatment.
• NEVER check for a fuel leak with your
hands. ALWAYS use a piece of wood
or cardboard. Have your authorized
Yanmar marine dealer or distributor
repair the damage.
• Failure to comply could result in death
or serious injury.
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000 3 6 8 6
(
3
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(2)
(1)