Yanmar 2YM15 Operation Manual page 75

12/05
When there is dirt in the fuel, the filter
becomes clogged and the fuel will not flow
easily. Check and replace the element.
1. Close the fuel cock of the fuel tank.
2. Place an approved container under the
fuel filter.
3. Remove the filter case by loosening the
retaining ring (Figure 8, (2)). Turn the
ring counterclockwise using a filter
wrench.
4. Remove the housing (Figure 8, (1))
and remove the element. Replace the
element with a new one.
5. Apply a thin film of clean diesel fuel to
the sealing surface of the new filter
gasket.
6. Clean the inside of the housing
thoroughly, install the O-ring and
hand-tighten the retainer ring. Use a
filter wrench and tighten to 12 N·m
(106 in.-lb).
7. Air will enter the fuel system when the
filter is disassembled. Bleed the fuel
system to remove any air from the
system. See Bleeding the Fuel System
on page 30.
8. Dispose of waste properly.
Replacing the Engine Oil Filter
Element
See Replacing the Engine Oil Filter
Element on page 62.
Changing the Marine Gear Oil
See Changing the Marine Gear Oil on
page 62.
Checking or Replacing the Seawater
Pump Impeller
1. Loosen side cover bolts and remove
the side cover.
2. Inspect the inside of the seawater
pump with a flashlight. If any of the
following are found, service the
seawater pump:
YM Series Operation Manual
PERIODIC MAINTENANCE
• Impeller blades are cracked or nicked.
Edges or surfaces of the blades are
marred or scratched.
• Wear plate is damaged.
3. If no damage is found when inspecting
the inside of the pump, install the
O-ring and side cover.
4. If a large amount of water leaks
continuously from the water drain line
below the seawater pump during
operation, replace the mechanical seal.
Consult authorized Yanmar Marine
dealer or distributor.
When disassembly and maintenance of
the seawater pump are necessary, consult
your Yanmar Marine dealer or distributor.
The seawater pump turns in the direction
as shown in Figure 9. The impeller must
be installed while considering the impeller
direction.
Figure 8
4
1
Figure 9
1 – Impeller Vane Direction
2 – Impeller Rotating Direction
3 – Impeller
4 – Seawater Pump
3
2
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