If a large amount of water leaks continuously
from the water drain pipe beneath the
seawater pump during operation,
disassembly and maintenance
(replacement of the lip seal) are necessary.
When disassembly and maintenance of the
seawater pump are necessary, see your
Yanmar dealer or distributor.
Note: The seawater pump turns in the
direction as shown (Figure 7) and the
impeller must be installed to run in this
direction. If the impeller has been removed
for any reason and must be reassembled, be
very careful not to install it in the wrong
direction. Additionally, if the engine is being
turned manually, be careful to turn it in the
correct direction. Incorrect turning will twist
the impeller and damage it.
1
0002080
2
Figure 7
Replace the Zinc Anode
The timing for replacing the zinc anode
varies depending on the characteristics of
the seawater and operational conditions.
Inspect the zinc anode periodically and
remove the corroded area on the surface.
Replace the zinc anode when it has
decreased to less than 1/2 of the original
volume. If replacement of zinc anode is
neglected and operation is continued with a
corroded zinc anode, corrosion of the
seawater cooling system will occur and
water leakage or parts breakage will result.
The label (Figure 8) is stamped on the plugs
which have the zinc anode.
ZINC
0002081
Figure 8
Be sure to close the seacock before
removing the plug to replace the zinc anode.
Clean the Air Intake Silencer
Disassemble the intake silencer and clean
the inside thoroughly.
1. Take off the clamp and remove the
muffler.
2. Clean the element with a neutral
detergent.
3. Reassemble after the muffler is
completely dry.
PERIODIC MAINTENANCE
58
6LY3 LDC Operation Manual
© 2008 Yanmar Marine International