Operation; Cautions During Operation - Mitsubishi S12R-T2MPTK Operation & Maintenance Manual

Chapter 3 OPERATION

Operation

Cautions During Operation

Operate the Clutch Carefully
When shifting (operating clutch) between neutral and
forward, and between neutral and reverse, make
sure the engine speed is lower than 50 % of rated
speed.
The marine clutch can be damaged if the gear
(clutch) is shifted between forward and reverse while
the engine is operating at high speed.
Do not leave the clutch in a half-en-
gaged position.
When shifting the marine gear clutch, be sure to
securely place the clutch in the correct position, F
(Forward), R (Reverse) or N (Neutral). If the clutch
lever is not firmly engaged in one of these positions,
there is a risk for wearing or burning of clutch plates
by slipping.
Pay Attention to Gauges and Alarm
Lamps
If a gauge shows an abnormal indication or an alarm
lamp lights (buzzer is also activated), reduce the
engine speed to no load minimum rated speed, then
stop the engine. After the engine stops, inspect the
engine for abnormalities.
Pay Attention to Abnormal Noise
If the engine produces an abnormal sound during
operation, stop the engine and check for the cause of
noise. Continued operation can result in an unex-
pected accident.
3-18
Pay Attention to Exhaust Color
If the exhaust gas shows an abnormal color, there is
a problem in the engine. Stop the engine and inspect
the engine by referring to the TROUBLESHOOTING
section to locate and correct the problem.
Avoid Operating the Engine at a Speed
Which Causes Resonance
Depending on various factors such as the ship struc-
ture, engine frame rigidly and propeller shaft length,
the engine can cause amplified vibrations. Do not
operate the engine at a resonance-generating speed.
Observe Seawater Discharging Volume
If seawater does not circulate properly, overheating
and other problems can occur. Record the amount of
seawater discharged in normal operation, and regu-
larly check the amount of discharged seawater to
judge if it is normal.
Check to see if the kingston valve, seawater strainer
and other parts are clogged with dust or plastic parti-
cles.
Check to see if the seawater pump impeller is dam-
aged.