• When the impeller has been disassembled, be
careful to replace it so that it moves in the correct
direction. The seawater pump turns clockwise,
however, the impeller blades turn counterclockwise.
• When turning the engine by hand, be sure to turn
it in the correct direction. Turning it in the opposite
direction damages the blades of the impeller.
If a large amount of water leaks continuously from the
seawater pump during operation, disassembly and
maintenance (replacement of the mechanical seal) are
necessary. When disassembly and maintenance of the
seawater pump are necessary, consult your Yanmar
dealer or distributor.
(2) Washing the Cooling Water System and
Checking and Maintaining Parts
This maintenance requires specialized knowledge.
Consult your Yanmar dealer or distributor. Over time
rust and scale builds up in the seawater and fresh
water systems reducing their cooling performance.
Additionally, when the inside of the engine oil cooler
becomes dirty, lube oil cooling worsens, causing the
oil to deteriorate more quickly. Wash the following
related parts when the cooling water is being replaced.
Cooling water system related parts: seawater pump,
engine oil cooler, clutch oil cooler, fresh water pump,
fresh water cooler, thermostat, etc.
(3) Checking and Replacing the fuel pipe and
the cooling water pipe
This maintenance requires specialized knowledge.
Consult your Yanmar dealer or distributor. Check the
hoses of the fuel and cooling water piping and replace
if damaged.
(4) Replacing the Mixing Elbow
[OPTION]
This maintenance requires specialized knowledge.
Consult your Yanmar dealer or distributor. The mixing
elbows, which are constantly in contact with exhaust
gas and seawater, deteriorate with use and must be
replaced. If operation is continued without replacing
faulty elbows, water will leak into the boat, and gas
leakage may result in fires.
(5) Lapping of Intake/Exhaust Valves
This maintenance requires specialized knowledge.
Consult your Yanmar dealer or distributor. Adjustment
is necessary to maintain proper contact of the valves
and seats.
(6) Checking and Adjusting the Fuel Injection
Timing
This maintenance requires specialized knowledge.
Consult your Yanmar dealer or distributor. Fuel
injection timing must be adjusted to ensure optimal
engine performance.
Maintenace & Inspection
5
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MARINE DIESEL ENGINE 6CXM-GTE2
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Summary of Contents for 6CXM-GTE2
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