Yanmar 6LY3 series Operation Manual page 77

4. Alarm buzzer sounds during operation.
CAUTION
If any alarm indicator with
audible alarm sound appears on
the display during engine
operation, stop the engine
immediately. Determine the
cause and repair the problem
before you continue to operate
the engine.
5. Is there water, oil, or fuel leakage, or
are there any loose bolts?
Check the engine room periodically for
any problems.
6. Is there sufficient diesel fuel in the
diesel fuel tank?
Replenish diesel fuel before leaving the
dock to avoid running out of fuel during
operation.
7. When operating the engine at low
speed for long periods of time, race the
engine once every 2 hours.
Note: Racing the Engine: With the
gear in NEUTRAL, accelerate
from the low speed position to
the high speed position and
repeat this process about 5
times. This is done to clean out
carbon from the cylinders and
the fuel injection valve.
Neglecting to race the engine
will result in poor exhaust color
and reduce engine performance.
8. If possible, periodically operate the
engine at near maximum rpm, while
underway.
6LY3 Operation Manual
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0000029en6LY3
ENGINE OPERATION
This will generate higher exhaust
temperatures, which will help clean out
hard carbon deposits, maintaining
engine performance and prolonging the
life of the engine.
CAUTION
NEVER turn off the battery
switch (if equipped) or short the
battery cables during operation.
Damage to the electric system
will result.
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