FUEL SYSTEM
6LPA Service Manual
6-15
Fuel Injection Nozzle
12/05
© 2007 Yanmar Marine International
9. Remove the nozzle holder clamp from the
cylinder head (Figure 6-14).
10. Remove the fuel injection nozzle and seat from
the cylinder head. Remove the O-ring from the
fuel injection nozzle. Store fuel injection nozzle
in orderly manner so that they can be
reassembled to corresponding cylinders.
Figure 6-14
Figure 6-14
Fuel Injection Nozzle Testing
Leak Test
CAUTION! ALWAYS wear eye protection when
servicing the engine.
Increase the pressure to near the specified
injection pressure of 10 to 20 kgf/cm
2
, 0.98 to 1.96
MPa (142 to 284 psi). Check for oil leakage from
the injection hole and around the retaining nut.
There should be no leakage (Figure 6-15, (1)). If
leakage occurs from the nozzle (Figure 6-15, (2)),
replace, clean or repair the nozzle.
Figure 6-15
Figure 6-15
Spray Test
Check the spray condition for an even spray pattern
(Figure 6-16, (1)). If the spray condition is improper
(Figure 6-16, (2)), replace or clean the nozzle.
Figure 6-16
Figure 6-16
000526
3
(1)
(2)
0005264
(1)
(2)
(2)
(2)
0005265