Check Points And Precautions During Running - Yanmar 3YM30 Sevice Manual

2. Inspection and adjustment

2.6.3 Check points and precautions during running

Step Item
1 Checks before
operation
2 No load operation;
warm up operation
3 Cruising (load)
operation
4 Stopping the
engine
5 Checks after stop-
ping the engine
Instructions
1) Make sure that the sea cock is open.
2) Make sure there is enough lube oil and (fresh)
cooling water.
3) Operate the remote control handle and check if the
device connected to the engine works property.
1) When the lube oil temperature is raised to allow
the engine to start, the pilot lamp goes off.
2) When the engine is started, check the following:
• There is no leakage of water, fuel and lube oil.
• Exhaust gas does not leak when the engine is
started.
• here is no abnormal indication on the instrument
panel.
• There is no abnormality in cooling water discharge,
engine vibration. or engine sound.
3) To warm up the engine, operate at low speed for
about 5 minutes, then raise the speed to the rated
speed and then to max. speed.
1) Do not operate the engine at full load yet, but raise
the speed gradually for about 10 minutes until it
reaches the rated speed.
2) Make sure that exhaust gas color and temperature
are normal.
3) Check the instrument panel and see if the water
temperature and oil pressure are normal.
1) Before stopping the engine, operate it at 650-700
-1
min for about 5 minutes.
2) Raise engine speed to 1,800 min
stopping the engine and idle the engine for about
3-4 seconds.
1) Check again for water and oil leaks.
2) Make sure that no nuts and bolts are loose.
3) Close the sea cock and fuel cocks.
4) When the temperature is expected to fall below
freezing, drain the seawater.
5) Turn off the battery switch.
-1
jut before
47
Precautions
3) Lamp should go off
when engine is
running.
2)
• Fit leaks if any.
• Check the intake/
exhaust valves, fuel
injection nozzle and
cylinder head.
3) Do not raise the
engine speed
abruptly.
1) Stopping the engine
suddenly during high
speed operation
increases the
temperature of engine
parts.
2) This procedure
prevents carbon from
being deposited on
the valve seats, etc.
1) Check the oil seal
area.
2) Especially the engine
installation bolts.
4) Drain from the
seawater pump.