Cautions During Operation - Yanmar 4JH3-TE Series Operation Manual

JH-Turbo-Engels1b 28-06-2002 19:55
3. Operation
(3) Switching to Trawling
Use the trawling handle to begin trawling.
1. Operation continues at a low engine
speed of 1000rpm or less.
2. Reduce the speed by moving the
trawling handle from H to L.
Adjust the speed to the desired rate and
secure the trawling handle in place.
3. Before returning to normal operation, be
sure to move the trawling handle from L
to H.
NOTICE
When trawling, do not raise the
engine speed above 1000rpm, as this
results in early wear of and damage
to the clutch.
L
High speed (normal operation)
Low speed (trawling operation)
Pagina 29
Option KMH4A Clutch
H

3.3.4 Cautions During Operation

Always be on the lookout for problems
during engine operation.
Pay particular attention to the following:
(1) Is sufficient water being discharged
from the seawater outlet pipe?
If the discharge is small, stop the engine
immediately, identify the cause and repair.
(2) Is the exhaust colour normal?
The continuous emission of black exhaust
indicates engine overloading. This
shortens the engine's life and should be
avoided.
(3) Are there abnormal vibrations or
noise?
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.
(4) Alarm buzzer sounds during
operation.
If the alarm buzzer sounds during opera-
tion, lower the engine speed immediately,
check the warning lamps, and stop the
engine for repairs.
(5) Is there water, oil, or gas leakage, or
are there any loose bolts?
Check the engine room periodically for any
problems.
(6) Is there sufficient fuel oil in the fuel
oil tank?
Replenish fuel oil in advance 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 clutch in NEUTRAL, accelerate
from the low speed position to the high
GB
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