Cautions During Operation - Yanmar 8LV320 Operation Manual

CAUTIONS DURING
OPERATION
NOTICE
• Engine trouble can arise if the engine is operated
for a long time under overloaded conditions with
the control lever in the full throttle position
(maximum engine speed position), exceeding the
continuous rated output engine speed. Operate
the engine at about 100 min
the full throttle engine speed.
• If the engine is in the first 50 hours of operation,
see New Engine Break-In on page 12.
Always be on the lookout for problems during
engine operation.
Pay particular attention to the following:
1. Is sufficient seawater being discharged from the
exhaust and seawater outlet pipe?
If the discharge is small, stop the engine
immediately; identify the cause and repair.
2. Is the exhaust color normal?
The continuous emission of black exhaust smoke
indicates engine overloading. This shortens the
engine's life and should be avoided.
3. Are there abnormal vibrations or noise?
Excessive vibration may cause damage to the
engine, marine gear, hull and onboard
equipment. In addition, it causes noticeable
passenger and crew discomfort.
Depending on the hull structure, engine and hull
resonance may suddenly become great at a
certain engine speed range, causing heavy
vibrations. Avoid operation in this speed range. If
you hear any abnormal sounds, stop the engine
and inspect.
8LV Series Operation Manual
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(rpm) lower than
NOTICE
4. Alarm buzzer sounds during operation.
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, rev up the engine once
every 2 hours.
Revving up 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 rev up 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.
This will generate higher exhaust temperatures,
which will help clean out hard carbon deposits,
maintaining engine performance and prolonging
the life of the engine.
Never turn off the battery switch (if equipped) or
short the battery cables during operation.
Damage to the electric system will result.
ENGINE OPERATION
NOTICE
NOTICE
NOTICE
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