Yanmar 6LY3 series, Operation Manual

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PERIODIC MAINTENANCE
6LY3 Operation Manual
107
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.
Figure 7
Replace the Anode
The timing for replacing anode varies
depending on the characteristics of the
seawater and operational conditions.
Inspect the anode periodically and remove
the corroded area on the surface.
Replace the anode when it has decreased
to less than 1/2 of the original volume. If
replacement of anode is neglected and
operation is continued with a corroded
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 anode.
Figure 8
Be sure to close the seacock before
removing the plug to replace the 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.
1
00020 8 0
2
ZINC
00020 8 1
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