Yanmar 4BY2, Service Manual, Page: 144 / 248

FUEL SYSTEM
Repair
6-12
BY Service Manual
© 2009 Yanmar Marine International
Clean Fuel Injector Cavities
1. Remove fuel injector. See Remove Fuel Injector
on page 6-11.
2. Ensure the injector seal has been removed
from the bottom of the injector cavity
(Figure 6-12, (1)).
Figure 6-12
Figure 6-12
3. Thread the tip (special tool OEM No. 13 5 215)
(Figure 6-13, (1)) onto the end of special tool
OEM No. 13 5 214 (Figure 6-13, (2)).
Figure 6-13
Figure 6-13
4. Ensure O-ring (Figure 6-13, (3)) is in place and
insert the tip into hole at bottom of injector
cavity.
5. Remove tool OEM No. 13 5 214 from injector
cavity, leaving the tip in hole at bottom of cavity.
6. Push brush (Figure 6-13, (4)) into guide sleeve
(special tool OEM No. 13 5 210)
(Figure 6-13, (5)).
7. Insert brush and sleeve into injector cavity until
it touches the bottom (Figure 6-14).
Figure 6-14
Figure 6-14
8. Use a socket wrench to turn tool while applying
light pressure (Figure 6-15).
Figure 6-15
Figure 6-15
9. Clean sides of cavity by sliding tool in and out
(Figure 6-16).
Figure 6-16
Figure 6-16
000 3 67 9
(1)
000 3 6 8 1
(1) (
3
)
(4)
(5)
(2)