Repair; Remove Fuel Injector - Yanmar BY Series Service Manual

Repair

12/05

REPAIR

After completing work that involves opening the fuel
system, do the following:
• Bleed the system. See Bleed the Fuel System on
page 6-22.
• Start engine and check for leaks. Allow engine to
run until it is running smoothly.
• Check and delete any trouble codes that are
registered in the ECU after the work has been
completed.

Remove Fuel Injector

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 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. Remove return fuel line from fuel injector. See
Replace Injector Return Fuel Line on
page 6-21.
5. If removing only one fuel injector, remove the
clamp (Figure 6-9, (1)) joining the fuel injector
lines to each other. NOTICE: Immediately cap
or plug all openings to prevent contamination of
system.
Figure 6-9
Figure 6-9
BY Service Manual
( 1 )
( 2 )
0003677
© 2009 Yanmar Marine International
6. Remove high-pressure fuel line
(Figure 6-9, (2)) from injector and fuel rail. See
Remove and Install High-Pressure Fuel Lines
on page 6-14.
7. Remove two nuts retaining fuel injector flange.
Remove fuel injector and flange (Figure 6-10).
NOTICE: NEVER disassemble the fuel injector.
Replace the entire unit as necessary.
Figure 6-10
Figure 6-10
8. If the injector is stuck, assemble special tools
OEM No. 13 5 250, 13 5 231 and 13 5 232 and
fasten to injector high-pressure fuel line
connection. Remove using slide hammer
(Figure 6-11).
Figure 6-11
Figure 6-11
9. If injector gasket did not come out with injector,
remove it from the bottom of the injector seat.
FUEL SYSTEM
6-11