Yanmar BY series, Service Manual

Page: 146 / 275

FUEL SYSTEM
BY Service Manual 6-17
Repair
9. Install injector return fuel lines
(Figure 6-16, (4)) . See Replacing Injector
Return Fuel Line on page 6-28.
10. Install intake manifold. See Intake Manifold on
page 5-70.
11. Open all fuel supply valves.
12. Connect the battery negative (-) cable.
13. Fill and bleed fuel system. See Bleeding the
Fuel System on page 6-29 .
14. Start the engine and check for fuel leaks. Allow
the engine to run until it is running smoothly.
15. Check and delete any trouble codes that are
registered in the ECU after the work has been
completed.
Removing and Installing
High-Pressure Fuel Lines
IMPORTANT
When working on the oil, coolant or fuel
circuits you must protect the alternator from
contamination. Cover alternator with
suitable materials. Failure to comply may
result in an alternator failure.
Note: The procedures for high-pressure
injection lines or high-pressure line from
high-pressure fuel pump are essentially
the same. Differences are called out
within the steps.
1. Disconnect the battery negative (-) cable.
2. Shut off all valves in fuel supply system.
3. Remove intake manifold and cover intake ports
to prevent foreign objects from entering engine.
See Intake Manifold on page 5-70.
4. If removing only one line, remove the clamp
joining the fuel injector lines to each other.
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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CAUTION
• ALWAYS be environmentally
responsible.
• Follow the guidelines of the EPA or
other governmental agencies for the
proper disposal of hazardous
materials such as engine oil, diesel
fuel and engine coolant. Consult the
local authorities or reclamation facility.
• NEVER dispose of hazardous
materials irresponsibly by dumping
them into a sewer, on the ground, or
into ground water or waterways.
• Failure to follow these procedures may
seriously harm the environment.
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